TPS76901 TPS76912 TPS76915 TPS76918 TPS76925 TPS76927 TPS76928 TPS76930

TPS76927, TPS76928, TPS76930, TPS76933, TPS76950 ULTRA LOW-POWER 100-mA LOW-DROPOUT LINEAR REGULATORS SLVS203C JUNE 1999

TPS76901 TPS76901, TPS76912 TPS76912, TPS76915 TPS76915, TPS76918 TPS76918, TPS76925 TPS76925 TPS76927 TPS76927, TPS76928 TPS76928, TPS76930 TPS76930, TPS76933 TPS76933, TPS76950 TPS76950 ULTRA LOW-POWER 100-mA LOW-DROPOUT LINEAR REGULATORS SLVS203C SLVS203C JUNE 1999 REVISED SEPTEMBER 1999 D D D D D D D D DBV PACKAGE (TOP VIEW) 100-mA Low-Dropout Regulator Available in 1.2-V, 1.5-V, 1.8-V, 2.5-V, 2.7-V, 2.8-V, 3.0-V, 3.3-V, and 5-V Fixed-Output and Adjustable Versions Only 17 µA Quiescent Current at 100 mA 1 µA Quiescent Current in Standby Mode Dropout Voltage Typically 71 mV @ 100mA Over Current Limitation 40°C to 125°C Operating Junction Temperature Range 5-Pin SOT-23 (DBV) Package IN 1 GND 2 EN 3 5 OUT 4 NC/FB description The TPS769xx family of low-dropout (LDO) voltage regulators offers the benefits of low dropout voltage, ultra low-power operation, and miniaturized packaging. These regulators feature low dropout voltages and ultra low quiescent current compared to conventional LDO regulators. Offered in a 5-terminal small outline integrated-circuit SOT-23 package, the TPS769xx series devices are ideal for micropower operations and where board space is at a premium. A combination of new circuit design and process innovation has enabled the usual PNP pass transistor to be replaced by a PMOS pass element. Because the PMOS pass element behaves as a low-value resistor, the dropout voltage is very low, typically 71 mV at 100 mA of load current (TPS76950 TPS76950), and is directly proportional to the load current. Since the PMOS pass element is a voltage-driven device, the quiescent current is ultra low (28 µA maximum) and is stable over the entire range of output load current (0 mA to 100 mA). Intended for use in portable systems such as TPS76933 TPS76933 laptops and cellular phones, the ultra low-dropout GROUND CURRENT voltage feature and ultra low-power operation vs result in a significant increase in system battery FREE-AIR TEMPERATURE operating life. 22 21 Ground Current µ A The TPS769xx also features a logic-enabled sleep mode to shut down the regulator, reducing quiescent current to 1 µA typical at TJ = 25°C. The TPS769xx is offered in 1.2-V, 1.5-V, 1.8-V, 2.5-V, 2.7-V, 2.8-V, 3.0-V, 3.3-V, and 5-V fixed-voltage versions and in a variable version (programmable over the range of 1.2 V to 5.5 V). VI = 4.3 V CO = 4.7 µF 20 IO = 100 mA 19 18 IO = 0 mA 17 16 15 60 40 20 0 20 40 60 80 100 120 140 TA Free-Air Temperature °C 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. 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 TPS76901 TPS76901, TPS76912 TPS76912, TPS76915 TPS76915, TPS76918 TPS76918, TPS76925 TPS76925 TPS76927 TPS76927, TPS76928 TPS76928, TPS76930 TPS76930, TPS76933 TPS76933, TPS76950 TPS76950 ULTRA LOW-POWER 100-mA LOW-DROPOUT LINEAR REGULATORS SLVS203C SLVS203C JUNE 1999 REVISED SEPTEMBER 1999 AVAILABLE OPTIONS VOLTAGE TJ PACKAGE PART NUMBER SYMBOL Variable 1.2V to 5.5V TPS76901DBVT TPS76901DBVT TPS76901DBVR TPS76901DBVR PCFI 1.2 V TPS76912DBVT TPS76912DBVT TPS76915DBVT TPS76915DBVT TPS76912DBVR TPS76912DBVR TPS76915DBVR TPS76915DBVR PCGI TPS76918DBVT TPS76918DBVT TPS76925DBVT TPS76925DBVT TPS76918DBVR TPS76918DBVR TPS76925DBVR TPS76925DBVR TPS76927DBVT TPS76927DBVT TPS76928DBVT TPS76928DBVT TPS76927DBVR TPS76927DBVR TPS76928DBVR TPS76928DBVR PCKI TPS76930DBVR TPS76930DBVR TPS76933DBVR TPS76933DBVR PCMI 3.3 V TPS76930DBVT TPS76930DBVT TPS76933DBVT TPS76933DBVT 5.0 V TPS76950DBVT TPS76950DBVT TPS76950DBVR TPS76950DBVR PCOI 1.5 V 1.8 V SO SOT-23 (DBV) 2.5 V 40°C to 125°C 2.7 V 2.8 V 3.0 V The DBVT indicates tape and reel of 250 parts. The DBVR indicates tape and reel of 3000 parts. functional block diagram TPS76901 TPS76901 OUT IN EN Current Limit / Thermal Protection VREF FB GND TPS76912/15/18/25/27/28/30/33/50 TPS76912/15/18/25/27/28/30/33/50 OUT IN EN VREF Current Limit / Thermal Protection GND 2 POST OFFICE BOX 655303 · DALLAS, TEXAS 75265 PCHI PCII PCJI PCLI PCNI TPS76901 TPS76901, TPS76912 TPS76912, TPS76915 TPS76915, TPS76918 TPS76918, TPS76925 TPS76925 TPS76927 TPS76927, TPS76928 TPS76928, TPS76930 TPS76930, TPS76933 TPS76933, TPS76950 TPS76950 ULTRA LOW-POWER 100-mA LOW-DROPOUT LINEAR REGULATORS SLVS203C SLVS203C JUNE 1999 REVISED SEPTEMBER 1999 Terminal Functions TERMINAL NAME NO. I/O DESCRIPTION GND 2 Ground EN 3 I Enable input FB 4 I Feedback voltage (TPS76901 TPS76901 only) IN 1 I Input supply voltage NC 4 OUT 5 No connection (Fixed options only) O Regulated output voltage absolute maximum ratings over operating free-air temperature range (unless otherwise noted) Input voltage range (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to 13.5 V Voltage range at EN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to VI + 0.3 V Voltage on OUT, FB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Peak output current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Internally limited ESD rating, HBM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 kV Continuous total power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See dissipation rating table Operating virtual junction temperature range, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40°C to 150°C Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65°C to 150°C 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. NOTE 1: All voltage values are with respect to network ground terminal. DISSIPATION RATING TABLE PACKAGE TA 25°C POWER RATING DERATING FACTOR ABOVE TA = 25°C TA = 70°C POWER RATING TA = 85°C POWER RATING Recommended DBV 350 mW 3.5 mW/°C 192 mW 140 mW Absolute Maximum DBV 437 mW 3.5 mW/°C 280 mW 227 mW recommended operating conditions MIN NOM MAX UNIT Input voltage, VI (see Note 2) 2.7 10 Output voltage range, VO 1.2 5.5 V 0 100 mA 40 125 °C Continuous output current, IO (see Note 3) Operating junction temperature, TJ V NOTES: 2. To calculate the minimum input voltage for your maximum output current, use the following formula: VI(min) = VO(max) + VDO (max load) 3. Continuous output 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 3 TPS76901 TPS76901, TPS76912 TPS76912, TPS76915 TPS76915, TPS76918 TPS76918, TPS76925 TPS76925 TPS76927 TPS76927, TPS76928 TPS76928, TPS76930 TPS76930, TPS76933 TPS76933, TPS76950 TPS76950 ULTRA LOW-POWER 100-mA LOW-DROPOUT LINEAR REGULATORS SLVS203C SLVS203C JUNE 1999 REVISED SEPTEMBER 1999 electrical characteristics over recommended operating freeair temperature range, VI = VO(typ) + 1 V, IO = 100 mA, EN = 0V, CO = 4.7 µF (unless otherwise noted) PARAMETER TEST CONDITIONS TPS76901 TPS76901 1.2 V VO 5.5 V, 1.2 V VO 5.5 V, MIN TJ = 25°C TJ = 40°C to 125°C TPS76912 TPS76912 TJ = 25°C, TJ = 40°C to 125°C, TPS76918 TPS76918 TJ = 25°C, TJ = 40°C to 125°C, 2.8 V < VIN < 10 V TPS76925 TPS76925 TJ = 25°C, TJ = 40°C to 125°C, 3.5 V < VIN < 10 V TPS76927 TPS76927 TJ = 25°C, TJ = 40°C to 125°C, 3.7 V < VIN < 10 V TPS76928 TPS76928 TJ = 25°C, TJ = 40°C to 125°C, 3.8 V < VIN < 10 V TPS76930 TPS76930 TJ = 25°C, TJ = 40°C to 125°C, 4.0 V < VIN < 10 V TPS76933 TPS76933 TJ = 25°C, TJ = 40°C to 125°C, 4.3 V < VIN < 10 V TPS76950 TPS76950 TJ = 25°C, TJ = 40°C to 125°C, 6.0 V < VIN < 10 V EN = 0V, TJ = 25°C 0 mA < IO < 100 mA, EN = 0V, TJ = 40°C to 125°C IO = 0 to 100 mA, ) Quiescent current ( (GND current) (See Note 4 and Note 5) Load regulation 2.7 V < VIN < 10 V 2.8 V < VIN < 10 V 3.5 V < VIN < 10 V 3.7 V < VIN < 10 V 3.8 V < VIN < 10 V 4.0 V < VIN < 10 V 4.3 V < VIN < 10 V 6.0 V < VIN < 10 V 1.224 1.187 1.261 1.5 1.455 1.545 1.8 1.746 1.854 2.5 2.425 2.575 2.7 2.619 2.8 2.884 3.0 2.910 3.090 3.3 3.201 3.399 5.0 4.850 5.150 17 µA 28 12 %/V 0.1 BW = 300 Hz to 50 kHz, CO = 10 µF, TJ = 25°C Output current limit VO = 0 V, EN = VI, Standby current mV 0.04 VO + 1 V < VI 10 V, TJ = 40°C to 125°C, See Note 4 Output noise voltage V 2.781 2.716 VO + 1 V < VI 10 V, TJ = 25°C, See Note 4 g g Output voltage line regulation ( O/VO) (V (See Note 5) UNIT 1.03VO IO = 100 mA, EN = 0V, TJ = 25°C 0.97VO 2.7 V < VIN < 10 V 2.7 V < VIN < 10 V MAX VO 2.7 V < VIN < 10 V TPS76915 TPS76915 Output voltage (10 µA to 100 mA Load) (See Note 4) TJ = 25°C, TJ = 40°C to 125°C, TYP µVrms 190 See Note 4 350 2.7 < VI < 10 V 1 750 mA µA TJ = 40°C to 125°C 2 µA NOTES: 4. Minimum IN operating voltage is 2.7 V or VO(typ) + 1 V, whichever is greater. Maximum IN voltage 10 V, minimum output current 10 µA, maximum output current 100 mA. 5. 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) 4 + %V V POST OFFICE BOX 655303 O V * 2.7 V imax 100 V imax * V O 1000 )1 V 100 · DALLAS, TEXAS 75265 1000 TPS76901 TPS76901, TPS76912 TPS76912, TPS76915 TPS76915, TPS76918 TPS76918, TPS76925 TPS76925 TPS76927 TPS76927, TPS76928 TPS76928, TPS76930 TPS76930, TPS76933 TPS76933, TPS76950 TPS76950 ULTRA LOW-POWER 100-mA LOW-DROPOUT LINEAR REGULATORS SLVS203C SLVS203C JUNE 1999 REVISED SEPTEMBER 1999 electrical characteristics over recommended operating freeair temperature range, VI = VO(typ) + 1 V, IO = 100 mA, EN = 0V, CO = 4.7 µF (unless otherwise noted) (continued) PARAMETER TEST CONDITIONS MIN FB input current FB = 1.224 V (TPS76901 TPS76901) High level enable input voltage 2.7 V < VI < 10 V 2.7 V < VI < 10 V Power supply ripple rejection f = 1 kHz, TJ = 25°C, MAX UNIT µA 1.7 Low level enable input voltage TYP 1 CO = 10 µF, See Note 4 TPS76930 TPS76930 Dropout voltage (See Note 6) TPS76933 TPS76933 TPS76950 TPS76950 V 60 1 EN = VI TPS76928 TPS76928 V 0.9 EN = 0 V Input current (EN) 1 dB 1 IO = 50 mA, IO = 50 mA, 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 57 IO = 100 mA, IO = 100 mA, TJ = 25°C TJ = 40°C to 125°C 115 IO = 50 mA, IO = 50 mA, TJ = 25°C TJ = 40°C to 125°C 48 IO = 100 mA, IO = 100 mA, TJ = 25°C TJ = 40°C to 125°C 98 IO = 50 mA, IO = 50 mA, TJ = 25°C TJ = 40°C to 125°C 35 IO = 100 mA, IO = 100 mA, TJ = 25°C TJ = 40°C to 125°C µA 122 IO = 50 mA, IO = 50 mA, µA 60 IO = 100 mA, IO = 100 mA, 1 1 0 71 125 245 115 230 mV 100 200 85 170 NOTES: 4. Minimum IN operating voltage is 2.7 V or VO(typ) + 1 V, whichever is greater. Maximum IN voltage 10 V, minimum output current 10 µA, maximum output current 100 mA. 6. IN voltage equals VO(Typ) 100mV; TPS76901 TPS76901 output voltage set to 3.3V nominal with external resistor divider. TPS76912 TPS76912, TPS76915 TPS76915, TPS76918 TPS76918, TPS76925 TPS76925, and TPS76927 TPS76927 dropout voltage limited by input voltage range limitations. TYPICAL CHARACTERISTICS Table of Graphs FIGURE VO vs Output current Output voltage 1, 2, 3 4, 5, 6 vs Free-air temperature 7 Output spectral noise density Zo VDO vs Free-air temperature Ground current vs Frequency 8 Output impedance vs Frequency 9 Dropout voltage vs Free-air temperature 10 Ripple rejection vs Frequency LDO startup time 11 12 Line transient response 13, 15 Load transient response 14, 16 Equivalent series resistance (ESR) POST OFFICE BOX 655303 vs Output current 17, 19 vs Added ceramic capacitance 18, 20 · DALLAS, TEXAS 75265 5 TPS76901 TPS76901, TPS76912 TPS76912, TPS76915 TPS76915, TPS76918 TPS76918, TPS76925 TPS76925 TPS76927 TPS76927, TPS76928 TPS76928, TPS76930 TPS76930, TPS76933 TPS76933, TPS76950 TPS76950 ULTRA LOW-POWER 100-mA LOW-DROPOUT LINEAR REGULATORS SLVS203C SLVS203C JUNE 1999 REVISED SEPTEMBER 1999 TYPICAL CHARACTERISTICS TPS76925 TPS76925 TPS76915 TPS76915 OUTPUT VOLTAGE vs OUTPUT CURRENT OUTPUT VOLTAGE vs OUTPUT CURRENT 1.498 2.498 VI = 3.5 V CO = 4.7 µF TA = 25° C 2.496 1.496 VO Output Voltage V 2.494 VO Output Voltage V VI = 2.7 V CO = 4.7 µF TA = 25° C 2.492 2.490 2.488 2.486 1.494 1.492 1.490 1.488 1.486 2.484 1.484 2.482 0 20 40 60 80 0 100 20 40 60 80 Figure 1 Figure 2 TPS76933 TPS76933 TPS76915 TPS76915 OUTPUT VOLTAGE vs OUTPUT CURRENT OUTPUT VOLTAGE vs FREE-AIR TEMPERATURE 1.496 3.284 VI = 4.3 V CO = 4.7 µF TA = 25° C 3.282 1.494 IO = 1 mA VI = 2.7 V CO = 4.7 µF 3.280 VO Output Voltage V VO Output Voltage V 1.492 3.278 3.276 3.274 3.272 1.490 1.488 1.486 IO = 100 mA 1.484 1.482 3.270 0 20 40 60 80 100 1.480 60 40 20 0 20 40 Figure 3 Figure 4 POST OFFICE BOX 655303 60 80 100 120 140 TA Free-Air Temperature °C IO Output Current mA 6 100 IO Output Current mA IO Output Current mA · DALLAS, TEXAS 75265 TPS76901 TPS76901, TPS76912 TPS76912, TPS76915 TPS76915, TPS76918 TPS76918, TPS76925 TPS76925 TPS76927 TPS76927, TPS76928 TPS76928, TPS76930 TPS76930, TPS76933 TPS76933, TPS76950 TPS76950 ULTRA LOW-POWER 100-mA LOW-DROPOUT LINEAR REGULATORS SLVS203C SLVS203C JUNE 1999 REVISED SEPTEMBER 1999 TYPICAL CHARACTERISTICS TPS76925 TPS76925 TPS76933 TPS76933 OUTPUT VOLTAGE vs FREE-AIR TEMPERATURE OUTPUT VOLTAGE vs FREE-AIR TEMPERATURE 2.496 3.285 2.494 IO = 1 mA VO Output Voltage V VO Output Voltage V 2.490 2.488 2.486 2.484 IO = 100 mA 2.482 2.480 2.476 60 40 20 0 20 40 60 VI = 4.3 V CO = 4.7 µF 3.275 3.270 IO = 100 mA 3.265 3.260 VI = 3.5 V CO = 4.7 µF 2.478 IO = 1 mA 3.280 2.492 3.255 60 40 20 80 100 120 140 TA Free-Air Temperature °C Figure 5 TPS76933 TPS76933 40 60 80 100 120 140 TPS76933 TPS76933 OUTPUT SPECTRAL NOISE DENSITY vs FREQUENCY 22 2 VI = 4.3 V CO = 4.7 µF Output Spectral Noise Density µV Hz Ground Current µ A 20 Figure 6 GROUND CURRENT vs FREE-AIR TEMPERATURE 21 0 TA Free-Air Temperature °C 20 IO = 100 mA 19 18 IO = 0 mA 17 16 15 60 40 20 0 20 40 60 80 100 120 140 1.8 CO = 10 µF IO = 1 mA 1.6 CO = 4.7 µF IO = 100 mA 1.4 1.2 1 0.8 CO = 4.7 µF IO = 1 mA 0.6 0.4 0.2 VI = 4.3 V 0 100 TA Free-Air Temperature °C CO = 10 µF IO = 100 mA 1k 10k f Frequency Hz 100k Figure 8 Figure 7 POST OFFICE BOX 655303 · DALLAS, TEXAS 75265 7 TPS76901 TPS76901, TPS76912 TPS76912, TPS76915 TPS76915, TPS76918 TPS76918, TPS76925 TPS76925 TPS76927 TPS76927, TPS76928 TPS76928, TPS76930 TPS76930, TPS76933 TPS76933, TPS76950 TPS76950 ULTRA LOW-POWER 100-mA LOW-DROPOUT LINEAR REGULATORS SLVS203C SLVS203C JUNE 1999 REVISED SEPTEMBER 1999 TYPICAL CHARACTERISTICS TPS76933 TPS76933 OUTPUT IMPEDANCE vs FREQUENCY DROPOUT VOLTAGE vs FREE-AIR TEMPERATURE 2 Zo Output Impedance 1.6 VI = 3.2 V CO = 4.7 µF VDO Dropout Voltage mV 1.8 1000 VI = 4.3 V CO = 4.7 µF ESR = 0.3 TA = 25° C 1.4 1.2 1 0.8 IO = 1 mA 0.6 0.4 IO = 100 mA 10 IO = 10 mA IO = 100 mA 0.2 0 10 100 100 1k 10 k 100 k 1M 1 60 40 20 0 20 40 60 80 100 120 140 TA Free-Air Temperature °C f Frequency Hz Figure 9 Figure 10 TPS76933 TPS76933 RIPPLE REJECTION vs FREQUENCY 100 LDO STARTUP TIME 90 Ripple Rejection dB 80 EN 70 IO = 1 mA 60 50 40 30 IO = 100 mA 20 10 0 10 10 VI = 4.3 V CO = 4.7 µF ESR = 0.3 100 VO 1k 10 k 100 k 1M 10 M 0 20 f Frequency Hz 60 80 100 120 140 160 180 200 t Time µs Figure 12 Figure 11 8 40 POST OFFICE BOX 655303 · DALLAS, TEXAS 75265 TPS76901 TPS76901, TPS76912 TPS76912, TPS76915 TPS76915, TPS76918 TPS76918, TPS76925 TPS76925 TPS76927 TPS76927, TPS76928 TPS76928, TPS76930 TPS76930, TPS76933 TPS76933, TPS76950 TPS76950 ULTRA LOW-POWER 100-mA LOW-DROPOUT LINEAR REGULATORS SLVS203C SLVS203C JUNE 1999 REVISED SEPTEMBER 1999 10 0 10 3.7 VI Input Voltage V TPS76915 TPS76915 LOAD TRANSIENT RESPONSE Current Load mA TPS76915 TPS76915 LINE TRANSIENT RESPONSE 2.7 IL = 10 mA CO = 4.7 µF ESR = 0.3 0 20 40 60 100 0 VO Change In Output Voltage mV VO Output Voltage mV TYPICAL CHARACTERISTICS 0 200 VI = 2.7 V CO = 10 µF ESR = 0.3 400 0 80 100 120 140 160 180 200 t Time µs 20 40 10 0 10 VO Change In Output Voltage mV 5.3 VI Input Voltage V TPS76933 TPS76933 LOAD TRANSIENT RESPONSE Current Load mA VO Output Voltage mV TPS76933 TPS76933 LINE TRANSIENT RESPONSE 4.3 IL = 10 mA CO = 4.7 µF ESR = 0.3 20 40 60 80 100 120 140 160 180 200 t Time µs Figure 14 Figure 13 0 60 80 100 120 140 160 180 t Time µs 100 0 VI = 4.3 V CO = 4.7 µF ESR = 0.3 100 0 100 0 20 40 60 80 100 120 140 160 180 t Time µs Figure 16 Figure 15 POST OFFICE BOX 655303 · DALLAS, TEXAS 75265 9 TPS76901 TPS76901, TPS76912 TPS76912, TPS76915 TPS76915, TPS76918 TPS76918, TPS76925 TPS76925 TPS76927 TPS76927, TPS76928 TPS76928, TPS76930 TPS76930, TPS76933 TPS76933, TPS76950 TPS76950 ULTRA LOW-POWER 100-mA LOW-DROPOUT LINEAR REGULATORS SLVS203C SLVS203C JUNE 1999 REVISED SEPTEMBER 1999 TYPICAL CHARACTERISTICS TPS76933 TPS76933 TYPICAL REGIONS OF STABILITY TPS76933 TPS76933 TYPICAL REGIONS OF STABILITY EQUIVALENT SERIES RESISTANCE (ESR) vs OUTPUT CURRENT EQUIVALENT SERIES RESISTANCE (ESR) vs ADDED CERAMIC CAPACITANCE 100 VIN = 4.3 V CO = 4.7 µF ESR = 0.3 3.3 V LDO Region of Instability 10 Region of Stability 1 0.1 ESR Equivalent Series Resistance ESR Equivalent Series Resistance 100 VIN = 4.3 V CO = 4.7 µF IL = 100 mA Region of Instability 10 Region of Stability 1 0 25 50 75 0 100 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 Added Ceramic Capacitance µF IO Output Current mA Figure 18 Figure 17 TPS76933 TPS76933 TYPICAL REGIONS OF STABILITY TPS76933 TPS76933 TYPICAL REGIONS OF STABILITY EQUIVALENT SERIES RESISTANCE (ESR) vs OUTPUT CURRENT EQUIVALENT SERIES RESISTANCE (ESR) vs ADDED CERAMIC CAPACITANCE 100 VIN = 4.3 V CO = 10 µF ESR = 0.3 3.3 V LDO ESR Equivalent Series Resistance ESR Equivalent Series Resistance 100 Region of Instability 10 1 Region of Stability 0.1 VIN = 4.3 V CO = 10 µF IL = 100 mA Region of Instability 10 Region of Stability 1 0 25 50 75 100 0 0.1 0.2 0.3 0.4 0.5 Figure 20 Figure 19 POST OFFICE BOX 655303 0.6 0.7 0.8 Added Ceramic Capacitance µF IO Output Current mA 10 1 · DALLAS, TEXAS 75265 0.9 1 TPS76901 TPS76901, TPS76912 TPS76912, TPS76915 TPS76915, TPS76918 TPS76918, TPS76925 TPS76925 TPS76927 TPS76927, TPS76928 TPS76928, TPS76930 TPS76930, TPS76933 TPS76933, TPS76950 TPS76950 ULTRA LOW-POWER 100-mA LOW-DROPOUT LINEAR REGULATORS SLVS203C SLVS203C JUNE 1999 REVISED SEPTEMBER 1999 APPLICATION INFORMATION The TPS769xx family of low-dropout (LDO) regulators have been optimized for use in battery-operated equipment. They feature extremely low dropout voltages, low quiescent current (17 µA nominally), and enable inputs to reduce supply currents to 1 µA when the regulators are turned off. device operation The TPS769xx uses a PMOS pass element to dramatically reduce both dropout voltage and supply current over more conventional PNP-pass-element LDO designs. The PMOS pass element is a voltage-controlled device and, unlike a PNP transistor, it does not require increased drive current as output current increases. Supply current in the TPS769xx is essentially constant from no load to maximum load. Current limiting and thermal protection prevent damage by excessive output current and/or power dissipation. The device switches into a constant-current mode at approximately 350 mA; further load reduces the output voltage instead of increasing the output current. The thermal protection shuts the regulator off if the junction temperature rises above approximately 165°C. Recovery is automatic when the junction temperature drops approximately 25°C below the high temperature trip point. The PMOS pass element includes a back gate diode that conducts reverse current when the input voltage level drops below the output voltage level. A voltage of 1.7 V or greater on the EN input will disable the TPS769xx internal circuitry, reducing the supply current to 1µA. A voltage of less than 0.9 V on the EN input will enable the TPS769xx and will enable normal operation to resume. The EN input does not include any deliberate hysteresis, and it exhibits an actual switching threshold of approximately 1.5 V. A typical application circuit is shown in Figure 21. TPS769xx VI C1 1 µF 1 IN NC/FB OUT 4 5 VO 3 EN + GND 2 4.7 µF ESR = 0.2 TPS76912 TPS76912, TPS76915 TPS76915, TPS76918 TPS76918, TPS76925 TPS76925, TPS76927 TPS76927, TPS76928 TPS76928, TPS76930 TPS76930, TPS76933 TPS76933, TPS76950 TPS76950 (fixed-voltage options). Figure 21. Typical Application Circuit POST OFFICE BOX 655303 · DALLAS, TEXAS 75265 11 TPS76901 TPS76901, TPS76912 TPS76912, TPS76915 TPS76915, TPS76918 TPS76918, TPS76925 TPS76925 TPS76927 TPS76927, TPS76928 TPS76928, TPS76930 TPS76930, TPS76933 TPS76933, TPS76950 TPS76950 ULTRA LOW-POWER 100-mA LOW-DROPOUT LINEAR REGULATORS SLVS203C SLVS203C JUNE 1999 REVISED SEPTEMBER 1999 APPLICATION INFORMATION external capacitor requirements Although not required, a 0.047-µF or larger ceramic input bypass capacitor, connected between IN and GND and located close to the TPS769xx, is recommended to improve transient response and noise rejection. A higher-value electrolytic input capacitor may be necessary if large, fast-rise-time load transients are anticipated and the device is located several inches from the power source. Like all low dropout regulators, the TPS769xx requires an output capacitor connected between OUT and GND to stabilize the internal control loop. The minimum recommended capacitance is 4.7 µF. The ESR (equivalent series resistance) of the capacitor should be between 0.2 and 10 . to ensure stability. Capacitor values larger than 4.7 µF are acceptable, and allow the use of smaller ESR values. Capacitances less than 4.7 µF are not recommended because they require careful selection of ESR to ensure stability. Solid tantalum electrolytic, aluminum electrolytic, and multilayer ceramic capacitors are all suitable, provided they meet the requirements described above. Most of the commercially available 4.7 µF surface-mount solid tantalum capacitors, including devices from Sprague, Kemet, and Nichico, meet the ESR requirements stated above. Multilayer ceramic capacitors may have very small equivalent series resistances and may thus require the addition of a low value series resistor to ensure stability. CAPACITOR SELECTION MFR. VALUE MAX ESR SIZE (H × L × W) T494B475K016AS T494B475K016AS KEMET 4.7 µF 1.5 1.9 × 3.5 × 2.8 195D106x0016x2T SPRAGUE 10 µF 1.5 1.3 × 7.0 × 2.7 695D106x003562T SPRAGUE 10 µF 1.3 2.5 × 7.6 × 2.5 PART NO. TPSC475K035R0600 TPSC475K035R0600 AVX 4.7 µF 0.6 2.6 × 6.0 × 3.2 Size is in mm. ESR is maximum resistance in Ohms at 100 kHz and TA = 25°C. Contact manufacturer for minimum ESR values. 12 POST OFFICE BOX 655303 · DALLAS, TEXAS 75265 TPS76901 TPS76901, TPS76912 TPS76912, TPS76915 TPS76915, TPS76918 TPS76918, TPS76925 TPS76925 TPS76927 TPS76927, TPS76928 TPS76928, TPS76930 TPS76930, TPS76933 TPS76933, TPS76950 TPS76950 ULTRA LOW-POWER 100-mA LOW-DROPOUT LINEAR REGULATORS SLVS203C SLVS203C JUNE 1999 REVISED SEPTEMBER 1999 APPLICATION INFORMATION output voltage programming The output voltage of the TPS76901 TPS76901 adjustable regulator is programmed using an external resistor divider as shown in Figure 22. The output voltage is calculated using: V O ) + Vref 1 R1 R2 (1) Where Vref = 1.224 V typ (the internal reference voltage) Resistors R1 and R2 should be chosen for approximately 7-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 = 169 k to set the divider current at 7 µA and then calculate R1 using: R1 + V V O ref *1 (2) R2 OUTPUT VOLTAGE PROGRAMMING GUIDE OUTPUT VOLTAGE (V) TPS76901 TPS76901 DIVIDER RESISTANCE (k) R1 R2 2.5 174 169 3.3 287 169 3.6 324 169 4.0 383 523 169 1 IN OUT 1.7 V 169 5.0 VI 1 µF 3 VO R1 EN 0.9 V FB GND 2 1% values shown. 5 4 4.7 µF R2 ESR = 0.2 Figure 22. TPS76901 TPS76901 Adjustable LDO Regulator Programming POST OFFICE BOX 655303 · DALLAS, TEXAS 75265 13 TPS76901 TPS76901, TPS76912 TPS76912, TPS76915 TPS76915, TPS76918 TPS76918, TPS76925 TPS76925 TPS76927 TPS76927, TPS76928 TPS76928, TPS76930 TPS76930, TPS76933 TPS76933, TPS76950 TPS76950 ULTRA LOW-POWER 100-mA LOW-DROPOUT LINEAR REGULATORS SLVS203C SLVS203C JUNE 1999 REVISED SEPTEMBER 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 + TJmax * TA D(max) R qJA Where TJmax is the maximum allowable junction temperature RJA is the thermal resistance junction-to-ambient for the package, i.e., 285°C/W for the 5-terminal SOT23. 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. regulator protection The TPS769xx PMOS-pass transistor has a built-in back diode that conducts reverse current 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. If extended reverse voltage operation is anticipated, external limiting might be appropriate. The TPS769xx features internal current limiting and thermal protection. During normal operation, the TPS769xx limits output current to approximately 350 mA. 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 approximately 165°C, thermal-protection circuitry shuts it down. Once the device has cooled down to below approximately 140°C, regulator operation resumes. 14 POST OFFICE BOX 655303 · DALLAS, TEXAS 75265 TPS76901 TPS76901, TPS76912 TPS76912, TPS76915 TPS76915, TPS76918 TPS76918, TPS76925 TPS76925 TPS76927 TPS76927, TPS76928 TPS76928, TPS76930 TPS76930, TPS76933 TPS76933, TPS76950 TPS76950 ULTRA LOW-POWER 100-mA LOW-DROPOUT LINEAR REGULATORS SLVS203C SLVS203C JUNE 1999 REVISED SEPTEMBER 1999 MECHANICAL DATA DBV (R-PDSO-G5) PLASTIC SMALL-OUTLINE PACKAGE 0,40 0,20 0,95 5 0,25 M 4 1,80 1,50 1 0,15 NOM 3,00 2,50 3 Gage Plane 3,10 2,70 0,25 0° 8° 0,55 0,35 Seating Plane 1,30 1,00 0,10 0,05 MIN 4073253-4/B 4073253-4/B 10/97 NOTES: A. All linear dimensions are in millimeters. B. This drawing is subject to change without notice. C. Body dimensions include mold flash or protrusion. POST OFFICE BOX 655303 · DALLAS, TEXAS 75265 15 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. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those pertaining to warranty, patent infringement, and limitation of liability. TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in accordance with TI's standard warranty. Testing and other quality control techniques are utilized to the extent TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily performed, except those mandated by government requirements. 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