TPS77501 TPS77515 TPS77518 TPS77525 TPS77533 TPS77601 TPS77615 TPS77618 - Datasheet Archive

 

TPS77601, TPS77615, TPS77618, TPS77625, TPS77628, TPS77633 WITH PG OUTPUT FAST-TRANSIENT-RESPONSE 500-mA LOW-DROPOUT VOLTAGE

 

TPS77501 TPS77501, TPS77515 TPS77515, TPS77518 TPS77518, TPS77525 TPS77525, TPS77533 TPS77533 WITH RESET OUTPUT TPS77601 TPS77601, TPS77615 TPS77615, TPS77618 TPS77618, TPS77625 TPS77625, TPS77628 TPS77628, TPS77633 TPS77633 WITH PG OUTPUT FAST-TRANSIENT-RESPONSE 500-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS232B SLVS232B ­ SEPTEMBER 1999 ­ REVISED NOVEMBER 1999 D D D D D D D D D D Open Drain Power-On Reset With 200-ms Delay (TPS775xx) Open Drain Power Good (TPS776xx) 500-mA Low-Dropout Voltage Regulator Available in 1.5-V, 1.8-V, 2.5-V, 2.8-V (TPS77628 TPS77628 Only), 3.3-V Fixed Output and Adjustable Versions Dropout Voltage to 169 mV (Typ) at 500 mA (TPS77x33) Ultra Low 85 µA Typical Quiescent Current Fast Transient Response 2% Tolerance Over Specified Conditions for Fixed-Output Versions 8-Pin SOIC and 20-Pin TSSOP PowerPADTM (PWP) Package Thermal Shutdown Protection PWP PACKAGE (TOP VIEW) GND/HSINK GND/HSINK GND NC EN IN IN NC GND/HSINK GND/HSINK GND EN IN IN TPS77x33 DROPOUT VOLTAGE vs FREE-AIR TEMPERATURE 10­1 IO = 0 CO = 10 µF 10­2 ­60 ­40 ­20 0 20 40 60 VO ­ Change in Output Voltage ­ mV I O ­ Output Current ­ mA VDO ­ Dropout Voltage ­ mV IO = 10 mA 100 80 100 120 140 TA ­ Free-Air Temperature ­ °C 3 18 4 17 5 16 6 15 7 14 8 13 9 12 10 11 GND/HSINK GND/HSINK NC NC RESET/PG FB/NC OUT OUT GND/HSINK GND/HSINK 1 8 2 7 3 6 4 5 RESET/PG FB/NC OUT OUT TPS77x33 LOAD TRANSIENT RESPONSE 103 101 19 D PACKAGE (TOP VIEW) The TPS775xx and TPS776xx devices are designed to have a fast transient response and be stable with a 10-µF low ESR capacitors. This combination provides high performance at a reasonable cost. IO = 500 mA 20 2 NC ­ No internal connection description 102 1 CO = 2x47 µF ESR = 1/2x100 m VO = 3.3 V VI = 4.3 V 50 0 ­50 500 0 0 20 40 60 80 100 120 140 160 180 200 t ­ Time ­ µs Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PowerPAD is a trademark of Texas Instruments Incorporated. Copyright © 1999, Texas Instruments Incorporated PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. POST OFFICE BOX 655303 · DALLAS, TEXAS 75265 1 TPS77501 TPS77501, TPS77515 TPS77515, TPS77518 TPS77518, TPS77525 TPS77525, TPS77533 TPS77533 WITH RESET OUTPUT TPS77601 TPS77601, TPS77615 TPS77615, TPS77618 TPS77618, TPS77625 TPS77625, TPS77628 TPS77628, TPS77633 TPS77633 WITH PG OUTPUT FAST-TRANSIENT-RESPONSE 500-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS232B SLVS232B ­ SEPTEMBER 1999 ­ REVISED NOVEMBER 1999 description (continued) Because the PMOS device behaves as a low-value resistor, the dropout voltage is very low (typically 169 mV at an output current of 500 mA for the TPS77x33) and is directly proportional to the output current. Additionally, since the PMOS pass element is a voltage-driven device, the quiescent current is very low and independent of output loading (typically 85 µA over the full range of output current, 0 mA to 500 mA). These two key specifications yield a significant improvement in operating life for battery-powered systems. This LDO family also features a sleep mode; applying a TTL high signal to EN (enable) shuts down the regulator, reducing the quiescent current to 1 µA at TJ = 25°C. The RESET output of the TPS775xx initiates a reset in microcomputer and microprocessor systems in the event of an undervoltage condition. An internal comparator in the TPS775xx monitors the output voltage of the regulator to detect an undervoltage condition on the regulated output voltage. Power good (PG) of the TPS776xx is an active high output, which can be used to implement a power-on reset or a low-battery indicator. The TPS775xx and TPS776xx are offered in 1.5-V, 1.8-V, 2.5-V, 2.8 V (TPS77628 TPS77628 only), and 3.3-V fixed-voltage versions and in an adjustable version (programmable over the range of 1.5 V to 5.5 V for TPS77501 TPS77501 option and 1.2 V to 5.5 V for TPS77601 TPS77601 option). Output voltage tolerance is specified as a maximum of 2% over line, load, and temperature ranges. The TPS775xx and TPS776xx families are available in 8 pin SOIC and 20 pin TSSOP packages. AVAILABLE OPTIONS TJ OUTPUT VOLTAGE (V) PACKAGED DEVICES TSSOP (PWP) TYP SOIC (D) 3.3 TPS77633PWP TPS77633PWP TPS77533D TPS77533D TPS77633D TPS77633D TPS77525PWP TPS77525PWP TPS77625PWP TPS77625PWP TPS77525D TPS77525D TPS77625D TPS77625D 2.8 - TPS77628PWP TPS77628PWP - TPS77628D TPS77628D 1.8 TPS77518PWP TPS77518PWP TPS77618PWP TPS77618PWP TPS77518D TPS77518D TPS77618D TPS77618D 1.5 TPS77515PWP TPS77515PWP TPS77615PWP TPS77615PWP TPS77515D TPS77515D TPS77615D TPS77615D Adjustable 1.2 V to 5.5 V - TPS77601PWP TPS77601PWP - TPS77601D TPS77601D Adjustable 1.5 V to 5.5 V ­ 40°C to 125°C TPS77533PWP TPS77533PWP 2.5 TPS77501PWP TPS77501PWP - TPS77501D TPS77501D - The TPS77x01 is programmable using an external resistor divider (see application information). The D and PWP packages are available taped and reeled. Add an R suffix to the device type (e.g., TPS77501DR TPS77501DR). The TPS775xx has an open-drain power-on reset with a 200-ms delay function. The TPS776xx has an open-drain power good function. 2 POST OFFICE BOX 655303 · DALLAS, TEXAS 75265 TPS77501 TPS77501, TPS77515 TPS77515, TPS77518 TPS77518, TPS77525 TPS77525, TPS77533 TPS77533 WITH RESET OUTPUT TPS77601 TPS77601, TPS77615 TPS77615, TPS77618 TPS77618, TPS77625 TPS77625, TPS77628 TPS77628, TPS77633 TPS77633 WITH PG OUTPUT FAST-TRANSIENT-RESPONSE 500-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS232B SLVS232B ­ SEPTEMBER 1999 ­ REVISED NOVEMBER 1999 6 VI RESET/ PG IN 7 16 RESET/PG IN OUT 0.1 µF 5 EN OUT 14 VO 13 + GND CO 10 µF 3 See application information section for capacitor selection details. Figure 1. Typical Application Configuration for Fixed Output Options functional block diagram-adjustable version IN EN PG or RESET _ + OUT + _ 200 ms Delay (for RESET Option) Vref = 1.1834 V R1 FB/NC R2 GND External to the device POST OFFICE BOX 655303 · DALLAS, TEXAS 75265 3 TPS77501 TPS77501, TPS77515 TPS77515, TPS77518 TPS77518, TPS77525 TPS77525, TPS77533 TPS77533 WITH RESET OUTPUT TPS77601 TPS77601, TPS77615 TPS77615, TPS77618 TPS77618, TPS77625 TPS77625, TPS77628 TPS77628, TPS77633 TPS77633 WITH PG OUTPUT FAST-TRANSIENT-RESPONSE 500-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS232B SLVS232B ­ SEPTEMBER 1999 ­ REVISED NOVEMBER 1999 functional block diagram-fixed-voltage version IN EN PG or RESET _ + OUT + _ 200 ms Delay (for RESET Option) R1 Vref = 1.1834 V R2 GND 4 POST OFFICE BOX 655303 · DALLAS, TEXAS 75265 TPS77501 TPS77501, TPS77515 TPS77515, TPS77518 TPS77518, TPS77525 TPS77525, TPS77533 TPS77533 WITH RESET OUTPUT TPS77601 TPS77601, TPS77615 TPS77615, TPS77618 TPS77618, TPS77625 TPS77625, TPS77628 TPS77628, TPS77633 TPS77633 WITH PG OUTPUT FAST-TRANSIENT-RESPONSE 500-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS232B SLVS232B ­ SEPTEMBER 1999 ­ REVISED NOVEMBER 1999 Terminal Functions SOIC Package (TPS775xx) TERMINAL NAME I/O NO. DESCRIPTION EN 2 I Enable input FB/NC 7 I Feedback input voltage for adjustable device (no connect for fixed options) GND 1 Regulator ground IN 3, 4 I Input voltage OUT 5, 6 O Regulated output voltage 8 O RESET output RESET TSSOP Package (TPS775xx) TERMINAL NAME I/O NO. DESCRIPTION EN 5 I Enable input FB/NC 15 I Feedback input voltage for adjustable device (no connect for fixed options) GND 3 GND/HSINK Regulator ground 1, 2, 9, 10, 11, 12, 19, 20 Ground/heatsink IN 6, 7 NC 4, 8, 17, 18 OUT I Input voltage No connect 13, 14 O Regulated output voltage 16 O RESET output RESET SOIC Package (TPS776xx) TERMINAL NAME I/O NO. DESCRIPTION EN 2 I Enable input FB/NC 7 I Feedback input voltage for adjustable device (no connect for fixed options) GND 1 Regulator ground IN 3, 4 I Input voltage OUT 5, 6 O Regulated output voltage 8 O PG output PG TSSOP Package (TPS776xx) TERMINAL NAME NO. I/O DESCRIPTION EN 5 I Enable input FB/NC 15 I Feedback input voltage for adjustable device (no connect for fixed options) GND GND/HSINK 3 Regulator ground 1, 2, 9, 10, 11, 12, 19, 20 Ground/heatsink IN 6, 7 NC 4, 8, 17, 18 OUT PG I Input voltage No connect 13, 14 O Regulated output voltage 16 O PG output POST OFFICE BOX 655303 · DALLAS, TEXAS 75265 5 TPS77501 TPS77501, TPS77515 TPS77515, TPS77518 TPS77518, TPS77525 TPS77525, TPS77533 TPS77533 WITH RESET OUTPUT TPS77601 TPS77601, TPS77615 TPS77615, TPS77618 TPS77618, TPS77625 TPS77625, TPS77628 TPS77628, TPS77633 TPS77633 WITH PG OUTPUT FAST-TRANSIENT-RESPONSE 500-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS232B SLVS232B ­ SEPTEMBER 1999 ­ REVISED NOVEMBER 1999 TPS775xx RESET timing diagram VI Vres Vres t VO VIT + VIT + Threshold Voltage VIT ­ Less than 5% of the output voltage VIT ­ t 200 ms Delay ÎÎ ÎÎ ÎÎ ÎÎ ÎÎ Output Undefined 200 ms Delay ÎÎ ÎÎ ÎÎ ÎÎ ÎÎ RESET Output Output Undefined t Vres is the minimum input voltage for a valid RESET. The symbol Vres is not currently listed within EIA or JEDEC standards for semiconductor symbology. VIT ­Trip voltage is typically 5% lower than the output voltage (95%VO) VIT­ to VIT+ is the hysteresis voltage. 6 POST OFFICE BOX 655303 · DALLAS, TEXAS 75265 TPS77501 TPS77501, TPS77515 TPS77515, TPS77518 TPS77518, TPS77525 TPS77525, TPS77533 TPS77533 WITH RESET OUTPUT TPS77601 TPS77601, TPS77615 TPS77615, TPS77618 TPS77618, TPS77625 TPS77625, TPS77628 TPS77628, TPS77633 TPS77633 WITH PG OUTPUT FAST-TRANSIENT-RESPONSE 500-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS232B SLVS232B ­ SEPTEMBER 1999 ­ REVISED NOVEMBER 1999 absolute maximum ratings over operating free-air temperature range (unless otherwise noted) Input voltage range, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ­ 0.3 V to 13.5 V Voltage range at EN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ­0.3 V to 16.5 V Maximum RESET voltage (TPS775xx) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.5 V Maximum PG voltage (TPS776xx) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.5 V Peak output current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Internally limited Output voltage, VO (OUT, FB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Continuous total power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See dissipation rating tables Operating virtual junction temperature range, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ­ 40°C to 125°C Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ­ 65°C to 150°C ESD rating, HBM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 kV Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. All voltage values are with respect to network terminal ground. DISSIPATION RATING TABLE 1 ­ FREE-AIR TEMPERATURES D AIR FLOW (CFM) TA < 25°C POWER RATING DERATING FACTOR ABOVE TA = 25°C TA = 70°C POWER RATING TA = 85°C POWER RATING 0 568 mW 5.68 mW/°C 312 mW 227 mW 250 PACKAGE 904 mW 9.04 mW/°C 497 mW 361 mW DISSIPATION RATING TABLE 2 ­ FREE-AIR TEMPERATURES PACKAGE PWP# PWP|| AIR FLOW (CFM) TA < 25°C POWER RATING DERATING FACTOR ABOVE TA = 25°C TA = 70°C POWER RATING TA = 85°C POWER RATING 0 2.9 W 23.5 mW/°C 1.9 W 1.5 W 300 4.3 W 34.6 mW/°C 2.8 W 2.2 W 0 3W 23.8 mW/°C 1.9 W 1.5 W 300 7.2 W 57.9 mW/°C 4.6 W 3.8 W # This parameter is measured with the recommended copper heat sink pattern on a 1-layer PCB, 5-in × 5-in PCB, 1 oz. copper, 2-in × 2-in coverage (4 in2). || This parameter is measured with the recommended copper heat sink pattern on a 8-layer PCB, 1.5-in × 2-in PCB, 1 oz. copper with layers 1, 2, 4, 5, 7, and 8 at 5% coverage (0.9 in2) and layers 3 and 6 at 100% coverage (6 in2). For more information, refer to TI technical brief SLMA002 SLMA002. recommended operating conditions MIN Input voltage, VIk MAX UNIT 2.7 1.2 5.5 0 Operating virtual junction temperature, TJ (Note 1) 5.5 500 mA ­ 40 Output current, IO (Note 1) 1.5 TPS77601 TPS77601 Output voltage range, VO range 10 TPS77501 TPS77501 V 125 °C V k To calculate the minimum input voltage for your maximum output current, use the following equation: VI(min) = VO(max) + VDO(max load). NOTE 1: Continuous current and operating junction temperature are limited by internal protection circuitry, but it is not recommended that the device operate under conditions beyond those specified in this table for extended periods of time. POST OFFICE BOX 655303 · DALLAS, TEXAS 75265 7 TPS77501 TPS77501, TPS77515 TPS77515, TPS77518 TPS77518, TPS77525 TPS77525, TPS77533 TPS77533 WITH RESET OUTPUT TPS77601 TPS77601, TPS77615 TPS77615, TPS77618 TPS77618, TPS77625 TPS77625, TPS77628 TPS77628, TPS77633 TPS77633 WITH PG OUTPUT FAST-TRANSIENT-RESPONSE 500-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS232B SLVS232B ­ SEPTEMBER 1999 ­ REVISED NOVEMBER 1999 electrical characteristics over recommended operating free-air temperature Vi = VO(typ) + 1 V, IO = 1 mA, EN = 0 V, CO = 10 µF (unless otherwise noted) PARAMETER TEST CONDITIONS TPS77501 TPS77501 TPS77601 TPS77601 1.5 V VO 5.5 V, 1.5 V VO 5.5 V, 1.2 V VO 5.5 V, 1.2 V VO 5.5 V, TJ = 25°C TJ = ­40°C to 125°C TJ = 25°C TJ = ­40°C to 125°C TPS77x15 TPS77x18 TJ = 25°C, TJ = ­40°C to 125°C, TJ = 25°C, TJ = ­40°C to 125°C, TJ = 25°C, TJ = ­40°C to 125°C, TPS77x33 TJ = 25°C, TJ = ­40°C to 125°C, 4.3 V < VIN < 10 V 3.5 V < VIN < 10 V 3.8 V < VIN < 10 V 4.3 V < VIN < 10 V Quiescent current ( (GND current) ) EN = 0V, (see Note 2) 1.02VO 1.5 1.470 1.530 1.8 1.764 1.836 2.550 2.8 2.744 2.856 3.3 3.234 VO + 1 V < VI 10 V, TJ = 25°C 3.366 85 125 %/V 3 mV Output noise voltage BW = 300 Hz to 50 kHz, CO = 10 µF, TJ = 25°C 190 Output current Limit VO = 0 V 1.7 EN = VI, TPS77x01 µA 10 FB = 1.5 V 2 V 0.9 Minimum input voltage for valid RESET f = 1 KHz, TJ = 25°C IO(RESET) = 300µA Trip threshold voltage VO decreasing Hysteresis voltage Measured at VO Output low voltage VI = 2.7 V, Leakage current CO = 10 µF, V(RESET) = 5 V Power supply ripple rejection (see Note 2) dB 1.1 V 92 98 0.5 IO(RESET) = 1mA 0.15 1 IO(PG) = 300µA VO decreasing Hysteresis voltage Measured at VO Output low voltage VI = 2.7 V, V(PG) = 5 V POST OFFICE BOX 655303 %VO %VO · DALLAS, TEXAS 75265 0.4 V 1 NOTE 2: Minimum IN operating voltage is 2.7 V or VO(typ) + 1 V, whichever is greater. Maximum IN voltage 10V. 0.15 µA V 98 0.5 IO(PG) = 1mA V ms 1.1 92 %VO %VO 0.4 200 Trip threshold voltage V 60 RESET time-out delay Minimum input voltage for valid PG µA nA 1.7 Low level enable input voltage 8 A °C TJ = ­40°C to 125°C 2.7 V < VI < 10 V High level enable input voltage Leakage current 2 1 TJ = 25°C, 2.7 V < VI < 10 V EN = VI, Standby current PG (TPS776xx) µVrms 150 Thermal shutdown junction temperature Reset (TPS775xx) µA 0.01 Load regulation FB input current V 2.5 2.450 10 µA < IO < 500 mA, TJ = 25°C IO = 500 mA, TJ = ­40°C to 125°C Output voltage line regulation (VO/VO) (see Notes 2 and 3) UNIT 1.02VO 0.98VO 3.8 V < VIN < 10 V 2.8 V < VIN < 10 V MAX VO 3.5 V < VIN < 10 V TPS77628 TPS77628 0.98VO 2.8 V < VIN < 10 V 2.7 V < VIN < 10 V TYP VO 2.7 V < VIN < 10 V TPS77x25 Output voltage (10 µA to 500 mA load) (see Note 2) TJ = 25°C, TJ = ­40°C to 125°C, MIN range, µA TPS77501 TPS77501, TPS77515 TPS77515, TPS77518 TPS77518, TPS77525 TPS77525, TPS77533 TPS77533 WITH RESET OUTPUT TPS77601 TPS77601, TPS77615 TPS77615, TPS77618 TPS77618, TPS77625 TPS77625, TPS77628 TPS77628, TPS77633 TPS77633 WITH PG OUTPUT FAST-TRANSIENT-RESPONSE 500-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS232B SLVS232B ­ SEPTEMBER 1999 ­ REVISED NOVEMBER 1999 electrical characteristics over recommended operating free-air temperature Vi = VO(typ) + 1 V, IO = 1 mA, EN = 0 V, CO = 10 µF (unless otherwise noted) (continued) PARAMETER TEST CONDITIONS range, TYP MAX ­1 0 1 EN = VI Input current (EN) MIN EN = 0 V ­1 µA 1 TPS77628 TPS77628 IO = 500 mA, IO = 500 mA, TJ = 25°C TJ = ­40°C to 125°C 285 TPS77533 TPS77533 IO = 500 mA, IO = 500 mA, TJ = 25°C TJ = ­40°C to 125°C 169 TPS77633 TPS77633 Dropout voltage g (See Note 4) UNIT IO = 500 mA, IO = 500 mA, TJ = 25°C TJ = ­40°C to 125°C 169 NOTES: 3. If VO 1.8 V then Vimin = 2.7 V, Vimax = 10 V: Line Reg. (mV) + %V V O If VO 2.5 V then Vimin = VO + 1 V, Vimax = 10 V: Line Reg. (mV) + %V V O V * 2.7 V imax 100 V imax * V O mV 287 287 1000 )1 V 100 410 1000 4. IN voltage equals VO(Typ) ­ 100 mV; TPS77x15, TPS77x18, and TPS77x25 dropout voltage limited by input voltage range limitations (i.e., TPS77x33 input voltage needs to drop to 3.2 V for purpose of this test). Table of Graphs FIGURE VO vs Output current Output voltage 2, 3, 4 8 vs Frequency 9 Output spectral noise density VDO 5, 6, 7 vs Free-air temperature Power supply ripple rejection Zo vs Free-air temperature Ground current vs Frequency 10 Output impedance vs Frequency 11 vs Input voltage 12 Dropout voltage vs Free-air temperature Line transient response 13 14, 16 Load transient response 15, 17 Output voltage vs Time Equivalent series resistance (ESR) vs Output current POST OFFICE BOX 655303 · DALLAS, TEXAS 75265 18 20 ­ 23 9 TPS77501 TPS77501, TPS77515 TPS77515, TPS77518 TPS77518, TPS77525 TPS77525, TPS77533 TPS77533 WITH RESET OUTPUT TPS77601 TPS77601, TPS77615 TPS77615, TPS77618 TPS77618, TPS77625 TPS77625, TPS77628 TPS77628, TPS77633 TPS77633 WITH PG OUTPUT FAST-TRANSIENT-RESPONSE 500-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS232B SLVS232B ­ SEPTEMBER 1999 ­ REVISED NOVEMBER 1999 TYPICAL CHARACTERISTICS TPS77x15 TPS77x33 OUTPUT VOLTAGE vs OUTPUT CURRENT OUTPUT VOLTAGE vs OUTPUT CURRENT 1.4985 3.2835 VI = 4.3 V TA = 25°C 3.2830 VI = 2.7 V TA = 25°C 1.4980 VO ­ Output Voltage ­ V 1.4975 VO ­ Output Voltage ­ V 3.2825 1.4970 3.2820 1.4965 3.2815 1.4960 3.2810 1.4955 3.2805 1.4950 3.2800 0 0.1 0.2 0.3 0.4 IO ­ Output Current ­ A 0 0.5 0.1 0.2 0.3 0.4 Figure 2 Figure 3 TPS77x25 TPS77x33 OUTPUT VOLTAGE vs OUTPUT CURRENT OUTPUT VOLTAGE vs FREE-AIR TEMPERATURE 2.4960 3.32 VI = 3.5 V TA = 25°C 2.4955 VI = 4.3 V 3.31 VO ­ Output Voltage ­ V VO ­ Output Voltage ­ V 2.4950 2.4945 2.4940 2.4935 2.4930 3.30 3.29 IO = 500 mA IO = 1 mA 3.28 3.27 3.26 2.4925 2.4920 0 0.1 0.2 0.3 0.4 0.5 3.25 ­60 ­40 ­20 0 20 40 Figure 4 Figure 5 POST OFFICE BOX 655303 60 80 100 120 140 TA ­ Free-Air Temperature ­ °C IO ­ Output Current ­ A 10 0.5 IO ­ Output Current ­ A · DALLAS, TEXAS 75265 TPS77501 TPS77501, TPS77515 TPS77515, TPS77518 TPS77518, TPS77525 TPS77525, TPS77533 TPS77533 WITH RESET OUTPUT TPS77601 TPS77601, TPS77615 TPS77615, TPS77618 TPS77618, TPS77625 TPS77625, TPS77628 TPS77628, TPS77633 TPS77633 WITH PG OUTPUT FAST-TRANSIENT-RESPONSE 500-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS232B SLVS232B ­ SEPTEMBER 1999 ­ REVISED NOVEMBER 1999 TYPICAL CHARACTERISTICS TPS77x15 TPS77x25 OUTPUT VOLTAGE vs FREE-AIR TEMPERATURE OUTPUT VOLTAGE vs FREE-AIR TEMPERATURE 1.515 2.515 VI = 3.5 V VI = 2.7 V 2.510 VO ­ Output Voltage ­ V VO ­ Output Voltage ­ V 1.510 1.505 1.500 IO = 500 mA IO = 1 mA 1.495 1.490 2.505 2.500 IO = 500 mA 2.495 IO = 1 mA 2.490 2.485 1.485 ­60 ­40 ­20 0 20 40 60 80 2.480 ­60 ­40 100 120 140 TA ­ Free-Air Temperature ­ °C ­20 Figure 6 40 60 80 100 120 TPS77x33 TPS77xxx POWER SUPPLY RIPPLE REJECTION vs FREQUENCY 90 VI = 2.7 V 95 IO = 1 mA 85 IO = 500 mA 80 75 ­60 ­40 ­20 PSRR ­ Power Supply Ripple Rejection ­ dB 100 Ground Current ­ µ A 20 Figure 7 GROUND CURRENT vs FREE-AIR TEMPERATURE 90 0 TA ­ Free-Air Temperature ­ °C 70 60 50 40 30 20 10 0 ­ 10 0 20 40 60 80 100 120 140 VI = 4.3 V CO = 10 µF TA = 25°C 80 10 TA ­ Free-Air Temperature ­ °C 100 1k 10k 100k 1M f ­ Frequency ­ Hz Figure 8 Figure 9 POST OFFICE BOX 655303 · DALLAS, TEXAS 75265 11 TPS77501 TPS77501, TPS77515 TPS77515, TPS77518 TPS77518, TPS77525 TPS77525, TPS77533 TPS77533 WITH RESET OUTPUT TPS77601 TPS77601, TPS77615 TPS77615, TPS77618 TPS77618, TPS77625 TPS77625, TPS77628 TPS77628, TPS77633 TPS77633 WITH PG OUTPUT FAST-TRANSIENT-RESPONSE 500-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS232B SLVS232B ­ SEPTEMBER 1999 ­ REVISED NOVEMBER 1999 TYPICAL CHARACTERISTICS TPS77x33 TPS77x33 OUTPUT SPECTRAL NOISE DENSITY vs FREQUENCY OUTPUT IMPEDANCE vs FREQUENCY 0 VI = 4.3 V CO = 10 µF TA = 25°C VI = 4.3 V CO = 10 µF TA = 25°C Zo ­ Output Impedance ­ Output Spectral Noise Density ­ µV Hz 10­5 IO = 7 mA 10­6 IO = 500 mA 10­7 10­8 102 103 104 IO = 1 mA 10­1 IO = 500 mA 10­2 101 105 102 103 104 f ­ Frequency ­ kHz f ­ Frequency ­ Hz Figure 10 105 106 Figure 11 TPS77x33 TPS77x01 DROPOUT VOLTAGE vs FREE-AIR TEMPERATURE DROPOUT VOLTAGE vs INPUT VOLTAGE 103 350 IO = 500 mA VDO ­ Dropout Voltage ­ mV VDO ­ Dropout Voltage ­ mV 300 250 200 TA = 25°C TA = 125°C 150 100 TA = ­40°C 102 IO = 500 mA 101 IO = 10 mA 100 10­1 50 IO = 0 CO = 10 µF 0 2.5 3 3.5 4 VI ­ Input Voltage ­ V 4.5 5 10­2 ­60 ­40 ­20 Figure 12 12 0 20 40 Figure 13 POST OFFICE BOX 655303 60 80 100 120 140 TA ­ Free-Air Temperature ­ °C · DALLAS, TEXAS 75265 TPS77501 TPS77501, TPS77515 TPS77515, TPS77518 TPS77518, TPS77525 TPS77525, TPS77533 TPS77533 WITH RESET OUTPUT TPS77601 TPS77601, TPS77615 TPS77615, TPS77618 TPS77618, TPS77625 TPS77625, TPS77628 TPS77628, TPS77633 TPS77633 WITH PG OUTPUT FAST-TRANSIENT-RESPONSE 500-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS232B SLVS232B ­ SEPTEMBER 1999 ­ REVISED NOVEMBER 1999 TYPICAL CHARACTERISTICS VO ­ Change in Output Voltage ­ mV TPS77x15 LOAD TRANSIENT RESPONSE 3.7 2.7 I O ­ Output Current ­ mA VO ­ Change in Output Voltage ­ mV VI ­ Input Voltage ­ V TPS77x15 LINE TRANSIENT RESPONSE 10 0 CL = 10 µF TA = 25°C ­10 0 20 40 60 CO = 2x47 µF ESR = 1/2x100 m VO = 1.5 V VIN = 2.7 V 50 0 ­50 500 0 0 80 100 120 140 160 180 200 t ­ Time ­ µs 20 40 60 80 100 120 140 160 180 200 t ­ Time ­ µs Figure 15 Figure 14 TPS77x33 LOAD TRANSIENT RESPONSE VO ­ Change in Output Voltage ­ mV VI ­ Input Voltage ­ V TPS77x33 LINE TRANSIENT RESPONSE CL = 10 µF TA = 25°C 5.3 I O ­ Output Current ­ mA VO ­ Change in Output Voltage ­ mV 4.3 10 0 ­10 0 20 40 60 80 100 120 140 160 180 200 t ­ Time ­ µs CO = 2x47 µF ESR = 1/2x100 m VO = 3.3 V VI = 4.3 V 50 0 ­50 500 0 0 20 40 60 80 100 120 140 160 180 200 t ­ Time ­ µs Figure 17 Figure 16 POST OFFICE BOX 655303 · DALLAS, TEXAS 75265 13 TPS77501 TPS77501, TPS77515 TPS77515, TPS77518 TPS77518, TPS77525 TPS77525, TPS77533 TPS77533 WITH RESET OUTPUT TPS77601 TPS77601, TPS77615 TPS77615, TPS77618 TPS77618, TPS77625 TPS77625, TPS77628 TPS77628, TPS77633 TPS77633 WITH PG OUTPUT FAST-TRANSIENT-RESPONSE 500-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS232B SLVS232B ­ SEPTEMBER 1999 ­ REVISED NOVEMBER 1999 TYPICAL CHARACTERISTICS TPS77x33 OUTPUT VOLTAGE vs TIME (AT STARTUP) VO­ Output Voltage ­ V 4 3 2 1 Enable Pulse ­ V 0 0 20 40 60 80 100 120 140 160 180 200 t ­ Time ­ µs Figure 18 VI To Load IN OUT + EN CO GND R RL ESR Figure 19. Test Circuit for Typical Regions of Stability (Figures 20 through 23) (Fixed Output Options) 14 POST OFFICE BOX 655303 · DALLAS, TEXAS 75265 TPS77501 TPS77501, TPS77515 TPS77515, TPS77518 TPS77518, TPS77525 TPS77525, TPS77533 TPS77533 WITH RESET OUTPUT TPS77601 TPS77601, TPS77615 TPS77615, TPS77618 TPS77618, TPS77625 TPS77625, TPS77628 TPS77628, TPS77633 TPS77633 WITH PG OUTPUT FAST-TRANSIENT-RESPONSE 500-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS232B SLVS232B ­ SEPTEMBER 1999 ­ REVISED NOVEMBER 1999 TYPICAL CHARACTERISTICS TYPICAL REGION OF STABILITY TYPICAL REGION OF STABILITY EQUIVALENT SERIES RESISTANCE vs OUTPUT CURRENT EQUIVALENT SERIES RESISTANCE vs OUTPUT CURRENT 10 ESR ­ Equivalent Series Resistance ­ ESR ­ Equivalent series restance ­ 10 Region of Instability 1 Region of Stability Vo = 3.3 V CL = 4.7 µF VI = 4.3 V TA = 25°C 0.1 0 100 200 300 400 Region of Instability 1 Region of Stability Vo = 3.3 V Cl = 4.7 µF VI = 4.3 V TJ = 125°C 0.1 500 0 100 IO ­ Output Current ­ mA 200 300 400 Figure 20 Figure 21 TYPICAL REGION OF STABILITY TYPICAL REGION OF STABILITY EQUIVALENT SERIES RESISTANCE vs OUTPUT CURRENT EQUIVALENT SERIES RESISTANCE vs OUTPUT CURRENT 10 10 ESR ­ Equivalent series restance ­ ESR ­ Equivalent series restance ­ 500 IO ­ Output Current ­ mA Region of Instability 1 Region of Stability Vo = 3.3 V CL = 22 µF VI = 4.3 V TA = 25°C 0.1 0 100 200 300 400 500 Region of Instability 1 Region of Stability Vo = 3.3 V Cl = 22 µF VI = 4.3 V TJ = 125°C 0.1 0 100 IO ­ Output Current ­ mA 200 300 400 500 IO ­ Output Current ­ mA Figure 22 Figure 23 Equivalent series resistance (ESR) refers to the total series resistance, including the ESR of the capacitor, any series resistance added externally, and PWB trace resistance to CO. POST OFFICE BOX 655303 · DALLAS, TEXAS 75265 15 TPS77501 TPS77501, TPS77515 TPS77515, TPS77518 TPS77518, TPS77525 TPS77525, TPS77533 TPS77533 WITH RESET OUTPUT TPS77601 TPS77601, TPS77615 TPS77615, TPS77618 TPS77618, TPS77625 TPS77625, TPS77628 TPS77628, TPS77633 TPS77633 WITH PG OUTPUT FAST-TRANSIENT-RESPONSE 500-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS232B SLVS232B ­ SEPTEMBER 1999 ­ REVISED NOVEMBER 1999 APPLICATION INFORMATION The TPS775xx family includes four fixed-output voltage regulators (1.5 V, 1.8 V, 2.5 V, and 3.3 V), and an adjustable regulator, the TPS77501 TPS77501 (adjustable from 1.5 V to 5.5 V). The TPS776xx family includes five fixed-output voltage regulators (1.5 V, 1.8 V, 2.5 V, 2.8 V, and 3.3 V), and an adjustable regulator, the TPS77601 TPS77601 (adjustable from 1.2 V to 5.5 V). device operation The TPS775xx and TPS776xx feature very low quiescent current, which remains virtually constant even with varying loads. Conventional LDO regulators use a pnp pass element, the base current of which is directly proportional to the load current through the regulator (IB = IC/). The TPS775xx and TPS776xx use a PMOS transistor to pass current; because the gate of the PMOS is voltage driven, operating current is low and invariable over the full load range. Another pitfall associated with the pnp-pass element is its tendency to saturate when the device goes into dropout. The resulting drop in forces an increase in IB to maintain the load. During power up, this translates to large start-up currents. Systems with limited supply current may fail to start up. In battery-powered systems, it means rapid battery discharge when the voltage decays below the minimum required for regulation. The TPS775xx and TPS776xx quiescent currents remain low even when the regulator drops out, eliminating both problems. The TPS775xx and TPS776xx families also feature a shutdown mode that places the output in the high-impedance state (essentially equal to the feedback-divider resistance) and reduces quiescent current to 2 µA. If the shutdown feature is not used, EN should be tied to ground. Response to an enable transition is quick; regulated output voltage is typically reestablished in 120 µs. minimum load requirements The TPS775xx and TPS776xx families are stable even at zero load; no minimum load is required for operation. FB - pin connection (adjustable version only) The FB pin is an input pin to sense the output voltage and close the loop for the adjustable option . The output voltage is sensed through a resistor divider network to close the loop as it is shown in Figure 25. Normally, this connection should be as short as possible; however, the connection can be made near a critical circuit to improve performance at that point. Internally, FB connects to a high-impedance wide-bandwidth amplifier and noise pickup feeds through to the regulator output. Routing the FB connection to minimize/avoid noise pickup is essential. external capacitor requirements An input capacitor is not usually required; however, a ceramic bypass capacitor (0.047 µF or larger) improves load transient response and noise rejection if the TPS775xx or TPS776xx are located more than a few inches from the power supply. A higher-capacitance electrolytic capacitor may be necessary if large (hundreds of milliamps) load transients with fast rise times are anticipated. Like all low dropout regulators, the TPS775xx and TPS776xx require an output capacitor connected between OUT and GND to stabilize the internal control loop. The minimum recommended capacitance value is 10 µF and the ESR (equivalent series resistance) must be between 50 m and 1.5 . Capacitor values 10 µF or larger are acceptable, provided the ESR is less than 1.5 . Solid tantalum electrolytic, aluminum electrolytic, and multilayer ceramic capacitors are all suitable, provided they meet the requirements described previously. 16 POST OFFICE BOX 655303 · DALLAS, TEXAS 75265 TPS77501 TPS77501, TPS77515 TPS77515, TPS77518 TPS77518, TPS77525 TPS77525, TPS77533 TPS77533 WITH RESET OUTPUT TPS77601 TPS77601, TPS77615 TPS77615, TPS77618 TPS77618, TPS77625 TPS77625, TPS77628 TPS77628, TPS77633 TPS77633 WITH PG OUTPUT FAST-TRANSIENT-RESPONSE 500-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS232B SLVS232B ­ SEPTEMBER 1999 ­ REVISED NOVEMBER 1999 APPLICATION INFORMATION external capacitor requirements (continued) 6 VI 7 C1 0.1 µF 5 16 IN RESET/ PG IN 14 OUT 13 OUT EN RESET/PG 250 k VO CO + 10 µF GND 3 Figure 24. Typical Application Circuit (Fixed Versions) programming the TPS77x01 adjustable LDO regulator The output voltage of the TPS77x01 adjustable regulator is programmed using an external resistor divider as shown in Figure 25. The output voltage is calculated using: V O ) + Vref R1 R2 1 (1) Where Vref = 1.1834 V typ (the internal reference voltage) Resistors R1 and R2 should be chosen for approximately 10-µA divider current. Lower value resistors can be used but offer no inherent advantage and waste more power. Higher values should be avoided as leakage currents at FB increase the output voltage error. The recommended design procedure is to choose R2 = 110 k to set the divider current at approximately 10 µA and then calculate R1 using: R1 + V V O ref *1 (2) R2 OUTPUT VOLTAGE PROGRAMMING GUIDE TPS77x01 VI 0.1 µF IN RESET/ PG EN OUT FB / NC GND R1 R2 UNIT CO 121 110 k 3.3 V VO R1 OUTPUT VOLTAGE 2.5 V 250 k 1.7 V 0.9 V Reset or PG Output 196 110 k 3.6 V 226 110 k 4.75 V 332 110 k R2 Figure 25. TPS77x01 Adjustable LDO Regulator Programming POST OFFICE BOX 655303 · DALLAS, TEXAS 75265 17 TPS77501 TPS77501, TPS77515 TPS77515, TPS77518 TPS77518, TPS77525 TPS77525, TPS77533 TPS77533 WITH RESET OUTPUT TPS77601 TPS77601, TPS77615 TPS77615, TPS77618 TPS77618, TPS77625 TPS77625, TPS77628 TPS77628, TPS77633 TPS77633 WITH PG OUTPUT FAST-TRANSIENT-RESPONSE 500-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS232B SLVS232B ­ SEPTEMBER 1999 ­ REVISED NOVEMBER 1999 APPLICATION INFORMATION reset indicator The TPS775xx features a RESET output that can be used to monitor the status of the regulator. The internal comparator monitors the output voltage: when the output drops to between 92% and 98% of its nominal regulated value, the RESET output transistor turns on, taking the signal low. The open-drain output requires a pullup resistor. If not used, it can be left floating. RESET can be used to drive power-on reset circuitry or as a low-battery indicator. RESET does not assert itself when the regulated output voltage falls outside the specified 2% tolerance, but instead reports an output voltage low relative to its nominal regulated value (refer to timing diagram for start-up sequence). power-good indicator The TPS776xx features a power-good (PG) output that can be used to monitor the status of the regulator. The internal comparator monitors the output voltage: when the output drops to between 92% and 98% of its nominal regulated value, the PG output transistor turns on, taking the signal low. The open-drain output requires a pullup resistor. If not used, it can be left floating. PG can be used to drive power-on reset circuitry or used as a low-battery indicator. regulator protection The TPS775xx and TPS776xx PMOS-pass transistors have a built-in back diode that conducts reverse currents when the input voltage drops below the output voltage (e.g., during power down). Current is conducted from the output to the input and is not internally limited. When extended reverse voltage is anticipated, external limiting may be appropriate. The TPS775xx and TPS776xx also feature internal current limiting and thermal protection. During normal operation, the TPS775xx and TPS776xx limit output current to approximately 1.7 A. When current limiting engages, the output voltage scales back linearly until the overcurrent condition ends. While current limiting is designed to prevent gross device failure, care should be taken not to exceed the power dissipation ratings of the package. If the temperature of the device exceeds 150°C(typ), thermal-protection circuitry shuts it down. Once the device has cooled below 130°C(typ), regulator operation resumes. 18 POST OFFICE BOX 655303 · DALLAS, TEXAS 75265 TPS77501 TPS77501, TPS77515 TPS77515, TPS77518 TPS77518, TPS77525 TPS77525, TPS77533 TPS77533 WITH RESET OUTPUT TPS77601 TPS77601, TPS77615 TPS77615, TPS77618 TPS77618, TPS77625 TPS77625, TPS77628 TPS77628, TPS77633 TPS77633 WITH PG OUTPUT FAST-TRANSIENT-RESPONSE 500-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS232B SLVS232B ­ SEPTEMBER 1999 ­ REVISED NOVEMBER 1999 APPLICATION INFORMATION power dissipation and junction temperature Specified regulator operation is assured to a junction temperature of 125°C; the maximum junction temperature should be restricted to 125°C under normal operating conditions. This restriction limits the power dissipation the regulator can handle in any given application. To ensure the junction temperature is within acceptable limits, calculate the maximum allowable dissipation, PD(max), and the actual dissipation, PD, which must be less than or equal to PD(max). The maximum-power-dissipation limit is determined using the following equation: P D(max) + TJmax * TA R qJA Where TJmax is the maximum allowable junction temperature RJA is the thermal resistance junction-to-ambient for the package, i.e., 176°C/W for the 8-terminal SOIC and 32.6°C/W for the 20-terminal PWP with no airflow. TA is the ambient temperature. The regulator dissipation is calculated using: P D + VI * VO I O Power dissipation resulting from quiescent current is negligible. Excessive power dissipation will trigger the thermal protection circuit. POST OFFICE BOX 655303 · DALLAS, TEXAS 75265 19 TPS77501 TPS77501, TPS77515 TPS77515, TPS77518 TPS77518, TPS77525 TPS77525, TPS77533 TPS77533 WITH RESET OUTPUT TPS77601 TPS77601, TPS77615 TPS77615, TPS77618 TPS77618, TPS77625 TPS77625, TPS77628 TPS77628, TPS77633 TPS77633 WITH PG OUTPUT FAST-TRANSIENT-RESPONSE 500-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS232B SLVS232B ­ SEPTEMBER 1999 ­ REVISED NOVEMBER 1999 MECHANICAL DATA D (R-PDSO-G*) PLASTIC SMALL-OUTLINE PACKAGE 14 PIN SHOWN PINS * 0.050 (1,27) 8 14 16 A MAX 0.197 (5,00) 0.344 (8,75) 0.394 (10,00) A MIN 0.189 (4,80) 0.337 (8,55) 0.386 (9,80) DIM 0.020 (0,51) 0.014 (0,35) 14 0.010 (0,25) M 8 0.244 (6,20) 0.228 (5,80) 0.008 (0,20) NOM 0.157 (4,00) 0.150 (3,81) 1 Gage Plane 7 A 0.010 (0,25) 0°­ 8° 0.044 (1,12) 0.016 (0,40) Seating Plane 0.069 (1,75) MAX 0.010 (0,25) 0.004 (0,10) 0.004 (0,10) 4040047 / B 03/95 NOTES: A. B. C. D. E. 20 All linear dimensions are in inches (millimeters). This drawing is subject to change without notice. Body dimensions do not include mold flash or protrusion, not to exceed 0.006 (0,15). Four center pins are connected to die mount pad. Falls within JEDEC MS-012 MS-012 POST OFFICE BOX 655303 · DALLAS, TEXAS 75265 TPS77501 TPS77501, TPS77515 TPS77515, TPS77518 TPS77518, TPS77525 TPS77525, TPS77533 TPS77533 WITH RESET OUTPUT TPS77601 TPS77601, TPS77615 TPS77615, TPS77618 TPS77618, TPS77625 TPS77625, TPS77628 TPS77628, TPS77633 TPS77633 WITH PG OUTPUT FAST-TRANSIENT-RESPONSE 500-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS232B SLVS232B ­ SEPTEMBER 1999 ­ REVISED NOVEMBER 1999 MECHANICAL DATA PWP (R-PDSO-G*) PowerPADTM PLASTIC SMALL-OUTLINE PACKAGE 20-PIN 20-PIN SHOWN 0,30 0,19 0,65 20 0,10 M 11 Thermal Pad (See Note D) 4,50 4,30 0,15 NOM 6,60 6,20 Gage Plane 1 10 0,25 A 0°­ 8° 0,75 0,50 Seating Plane 0,15 0,05 1,20 MAX PINS * 0,10 14 16 20 24 28 A MAX 5,10 5,10 6,60 7,90 9,80 A MIN 4,90 4,90 6,40 7,70 9,60 DIM 4073225/E 4073225/E 03/97 NOTES: A. B. C. D. All linear dimensions are in millimeters. This drawing is subject to change without notice. Body dimensions do not include mold flash or protrusions. The package thermal performance may be enhanced by bonding the thermal pad to an external thermal plane. This pad is electrically and thermally connected to the backside of the die and possibly selected leads. E. Falls within JEDEC MO-153 MO-153 PowerPAD is a trademark of Texas Instruments Incorporated. POST OFFICE BOX 655303 · DALLAS, TEXAS 75265 21 IMPORTANT NOTICE Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. 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