TPS3306-15 TPS3306-18 TPS3306-20 TPS3306-25 TPS3306-33 SLVS290A TPS3306 TMS320 - Datasheet Archive

 

TPS3306-18, TPS3306-20 TPS3306-25, TPS3306-33 www.ti.com SLVS290A ­ APRIL 2000 ­ REVISED MAY 2004 DUAL PROCESSOR

 

TPS3306-15 TPS3306-15 TPS3306-18 TPS3306-18, TPS3306-20 TPS3306-20 TPS3306-25 TPS3306-25, TPS3306-33 TPS3306-33 www.ti.com SLVS290A SLVS290A ­ APRIL 2000 ­ REVISED MAY 2004 DUAL PROCESSOR SUPERVISORY CIRCUITS WITH POWER-FAIL FEATURES APPLICATIONS · · · · · · · · · · · · · · · Dual Supervisory Circuits With Power-Fail for DSP and Processor-Based Systems Voltage Monitor for Power-Fail or Low-Battery Warning Watchdog Timer With 0.8 Second Time-Out Power-On Reset Generator With Integrated 100 ms Delay Time Open-Drain Reset and Power-Fail Output Supply Current of 15 µA (Typ.) Supply Voltage Range . . . 2.7 V to 6 V Defined RESET Output From VDD 1.1 V MSOP-8 and SO-8 Packages Temperature Range . . . - 40°C to 85°C Multivoltage DSPs and Processors Portable Battery-Powered Equipment Embedded Control Systems Intelligent Instruments Automotive Systems D OR DGK PACKAGE (TOP VIEW) SENSE1 SENSE2 PFI GND 1 8 2 7 3 6 4 5 VDD WDI PFO RESET DESCRIPTION The TPS3306 TPS3306 family is a series of supervisory circuits designed for circuit initialization which require two supply voltages, primarily in DSP and processor-based systems. The product spectrum of the TPS3306-xx is designed for monitoring two independent supply voltages of 3.3 V/1.5 V, 3.3 V/1.8 V, 3.3 V/2 V, 3.3 V/2.5 V, or 3.3 V/5 V. TYPICAL OPERATING CIRCUIT 3.3 V 1.5 V AVDD TPS3306 TPS3306­15 R3 R4 CVDD SENSE1 R2 1% DVDD SENSE2 WDI B_XF PFI R1 1% VDD PFO A_XF GND RESET TMS320 TMS320 VC5441 VC5441 RESET VSS VSSA 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. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 2000­2004, Texas Instruments Incorporated TPS3306-15 TPS3306-15 TPS3306-18 TPS3306-18, TPS3306-20 TPS3306-20 TPS3306-25 TPS3306-25, TPS3306-33 TPS3306-33 www.ti.com SLVS290A SLVS290A ­ APRIL 2000 ­ REVISED MAY 2004 The various supervisory circuits are designed to monitor the nominal supply voltage, as shown in the following supply voltage monitoring table. SUPPLY VOLTAGE MONITORING DEVICE NOMINAL SUPERVISED VOLTAGE THRESHOLD VOLTAGE (typ) SENSE1 SENSE2 SENSE1 SENSE2 TPS3306-15 TPS3306-15 3.3 V 1.5 V 2.93 V 1.4 V TPS3306-18 TPS3306-18 3.3 V 1.8 V 2.93 V 1.68 V TPS3306-20 TPS3306-20 3.3 V 2V 2.93 V 1.85 V TPS3306-25 TPS3306-25 3.3 V 2.5 V 2.93 V 2.25 V TPS3306-33 TPS3306-33 5V 3.3 V 4.55 V 2.93 V During power-on, RESET is asserted when the supply voltage VDD becomes higher than 1.1 V. Thereafter, the supervisory circuits monitor the SENSEn inputs and keep RESET active as long as SENSEn remains below the threshold voltage VIT. An internal timer delays the return of the RESET output to the inactive state (high) to ensure proper system reset. The delay time, td(typ) = 100 ms, starts after SENSE1 and SENSE2 inputs have risen above the threshold voltage VIT. When the voltage at SENSE1 or SENSE2 input drops below the threshold voltage VIT, the output becomes active (low) again. The integrated power-fail (PFI) comparator with separate open-drain (PFO) output can be used for low-battery detection, power-fail warning, or for monitoring a power supply other than the main supply. The TPS3306-xx devices integrate a watchdog timer that is periodically triggered by a positive or negative transition of WDI. When the supervising system fails to retrigger the watchdog circuit within the time-out interval, tt(out) = 0.50 s, RESET becomes active for the time period td. This event also reinitializes the watchdog timer. Leaving WDI unconnected disables the watchdog. The TPS3306-xx devices are available in either 8-pin MSOP or standard 8-pin SO packages, and are characterized for operation over a temperature range of -40°C to 85°C. AVAILABLE OPTIONS PACKAGED DEVICES MARKING DGK PACKAGE TPS3306-15DGK TPS3306-15DGK TIAIC TPS3306-18DGK TPS3306-18DGK TIAID TPS3306-20D TPS3306-20D TPS3306-20DGK TPS3306-20DGK TIAIE TPS3306-25D TPS3306-25D TPS3306-25DGK TPS3306-25DGK TIAIF TPS3306-33D TPS3306-33D 2 µ-SMALL OUTLINE (DGK) TPS3306-18D TPS3306-18D -40°C to 85°C SMALL OUTLINE (D) TPS3306-15D TPS3306-15D TA TPS3306-33DGK TPS3306-33DGK TIAIG TPS3306-15 TPS3306-15 TPS3306-18 TPS3306-18, TPS3306-20 TPS3306-20 TPS3306-25 TPS3306-25, TPS3306-33 TPS3306-33 www.ti.com SLVS290A SLVS290A ­ APRIL 2000 ­ REVISED MAY 2004 FUNCTION/TRUTH TABLES SENSE1 > VIT1 SENSE2 > VIT2 RESET 0 0 L 0 1 L 1 0 L 1 1 H FUNCTION/TRUTH TABLES PFI > VIT PFO TYPICAL DELAY 0"1 L"H 0.5 µs 1"0 H"L 0.5 µs FUNCTIONAL BLOCK DIAGRAM TPS3306 TPS3306 SENSE 1 R1 VDD + _ SENSE 2 R2 R3 R4 RESET RESET Logic + Timer + _ GND Reference Voltage of 1.25 V Oscillator PFO _ + PFI WDI Transition Detection Watchdog Logic + Timer 40 k 3 TPS3306-15 TPS3306-15 TPS3306-18 TPS3306-18, TPS3306-20 TPS3306-20 TPS3306-25 TPS3306-25, TPS3306-33 TPS3306-33 www.ti.com SLVS290A SLVS290A ­ APRIL 2000 ­ REVISED MAY 2004 TIMING DIAGRAM SENSEn V(nom) VIT 1.1 V t WDI 1 tt(out) 0 t RESET 1 Undefined Behavior Undefined Behavior 0 t td td td RESET Because of Power-Down RESET Because of WDI RESET Because of a Power Drop Below VIT­ RESET Because of Power-Up Terminal Functions TERMINAL NAME NO. I/O DESCRIPTION GND 4 I Ground PFI 3 I Power-fail comparator input PFO 6 O Power-fail comparator output, open-drain RESET 5 O Active-low reset output, open-drain SENSE1 1 I Sense voltage input 1 SENSE2 2 I Sense voltage input 2 WDI 7 I Watchdog timer input VDD 8 I Supply voltage DETAILED DESCRIPTION Watchdog In a microprocessor- or DSP-based system, it is not only important to supervise the supply voltage, it is also important to ensure correct program execution. The task of a watchdog is to ensure that the program is not stalled in an indefinite loop. The microprocessor, microcontroller, or DSP has to typically toggle the watchdog input within 0.8 s to avoid a time out occurring. Either a low-to-high or a high-to-low transition resets the internal watchdog timer. If the input is unconnected or tied with a high impedance driver, the watchdog is disabled and will be retriggered internally. 4 TPS3306-15 TPS3306-15 TPS3306-18 TPS3306-18, TPS3306-20 TPS3306-20 TPS3306-25 TPS3306-25, TPS3306-33 TPS3306-33 www.ti.com SLVS290A SLVS290A ­ APRIL 2000 ­ REVISED MAY 2004 DETAILED DESCRIPTION (continued) Saving Current While Using the Watchdog The watchdog input is internally driven low during the first 7/8 of the watchdog time-out period, then momentarily pulses high, resetting the watchdog counter. For minimum watchdog input current (minimum overall power consumption), leave WDI low for the majority of the watchdog time-out period, pulsing it low-high-low once within 7/8 of the watchdog time-out period to reset the watchdog timer. If instead WDI is externally driven high for the majority of the time-out period, a current of 5 V/40 k 9 125 µA can flow into WDI. VDD VIT t WDI t(tout) t RESET td td t Figure 1. Watchdog Timing Power-Fail Comparator (PFI and PFO) An additional comparator is provided to monitor voltages other than the nominal supply voltage. The power-fail-input (PFI) will be compared with an internal voltage reference of 1.25 V. If the input voltage falls below the power-fail threshold (VPFI) of typ. 1.25 V, the power-fail output (PFO) goes low. If it goes above 1.25 V plus about 10 mV hysteresis, the output returns to high. By connecting two external resistors, it is possible to supervise any voltages above 1.25 V. The sum of both resistors should be about 1 M, to minimize power consumption and also to assure that the current in the PFI pin can be neglected compared with the current through the resistor network. The tolerance of the external resistors should be not more than 1% to ensure minimal variation of sensed voltage. If the power-fail comparator is unused, connect PFI to ground and leave PFO unconnected. V(SENSE) R1 1% VCC PFI R2 1% PFO TPS3306 TPS3306 GND VPFI,trip = 1.25 V × R1 + R2 R2 5 TPS3306-15 TPS3306-15 TPS3306-18 TPS3306-18, TPS3306-20 TPS3306-20 TPS3306-25 TPS3306-25, TPS3306-33 TPS3306-33 www.ti.com SLVS290A SLVS290A ­ APRIL 2000 ­ REVISED MAY 2004 ABSOLUTE MAXIMUM RATINGS over operating free-air temperature range (unless otherwise noted) (1) UNIT Supply voltage, VDD (see All other pins (see (2) 7V (2) -0.3 V to 7 V Maximum low output current, IOL 5 mA Maximum high output current, IOH - 5 mA Input clamp current, IIK (VI < 0 or VI > VDD) ±20 mA ±20 mA Output clamp current, IOK (VO < 0 or VO > VDD) Continuous total power dissipation See Dissipation Rating Table Operating free-air temperature range, TA -40°C to 85°C Storage temperature range, Tstg -65°C to 150°C Soldering temperature (1) (2) 260°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. All voltage values are with respect to GND. For reliable operation, the device must not be operated at 7 V for more than t = 1000 h continuously. 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 DGK 424 mW 3.4 mW/°C 271 mW 220 mW D 725 mW 5.8 mW/°C 464 mW 377 mW RECOMMENDED OPERATING CONDITIONS at specified temperature range MIN Supply voltage, VDD Input voltage at WDI and PFI, VI Input voltage at SENSE1 and SENSE2, VI High-level input voltage at WDI, VIH MAX 2.7 0 6 V VDD + 0.3 V 0 (VDD + 0.3)VIT/1.25 V 0.7 x VDD V V 0.3 × VDD Low-level input voltage at WDI, VIL Operating free-air temperature range, TA UNIT 6 -40 V 85 °C TPS3306-15 TPS3306-15 TPS3306-18 TPS3306-18, TPS3306-20 TPS3306-20 TPS3306-25 TPS3306-25, TPS3306-33 TPS3306-33 www.ti.com SLVS290A SLVS290A ­ APRIL 2000 ­ REVISED MAY 2004 ELECTRICAL CHARACTERISTICS over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX RESET, PFO Low-level output voltage Power-up reset voltage (see VDD = 3.3 V, IOL= 2 mA 0.4 0.4 VDD 1.1 V, IOL = 20 µA (1) 0.4 1.37 PFI 3 4.55 4.64 1.25 1.28 1.40 1.44 1.68 1.73 1.85 1.90 2.20 2.25 2.32 2.86 2.93 3.02 4.46 4.55 4.67 1.22 PFI 2.93 1.81 VDD = 2.7 V to 6 V TA = -40°C to 85°C 2.86 1.37 VSENSE1, VSENSE2 2.30 1.22 PFI 2.25 1.64 Negative-going input threshold voltage (see (2) 1.89 2.20 1.25 1.29 15 VIT = 1.86 V 20 VIT = 2.25 V 20 30 VIT = 4.55 V 40 mV WDI = VDD = 6 V, Time average (dc = 88%) 100 150 WDI = 0 V, VDD = 6 V, Time average (dc = 12%) -15 -20 WDI WDI = VDD = 6 V 120 170 SENSE1 VSENSE1 = VDD = 6 V 5 8 SENSE2 IH(AV) VSENSE2 = VDD = 6 V 6 9 -120 -170 Average high-level input current WDI IL(AV) Average low-level input current IH High-level input current IL Low-level input current WDI Input current PFI VDD = 6 V, 0 V VI VDD IDD Supply current Ci Input capacitance µA WDI = 0 V, VDD, = 6 V II (1) (2) V 15 VIT = 2.93 V VSENSEn V 10 VIT = 1.68 V Hysteresis VIT = 1.25 V VIT = 1.40 V Vhys V 1.72 1.85 4.46 VIT 1.68 V 1.43 1.81 VDD = 2.7 V to 6 V TA = 0°C to 85°C 1.40 1.64 VSENSE1, VSENSE2 UNIT 0.2 VDD = 6 V, IOL = 3 mA VOL VDD = 2.7 V to 6 V, IOL = 20 µA -25 µA 25 15 VI = 0 V to VDD µA 10 nA 40 µA pF The lowest supply voltage at which RESET becomes active. tr, VDD 15 µs/V. To ensure best stability of the threshold voltage, a bypass capacitor (ceramic 0.1 µF) should be placed close to the supply terminals. 7 TPS3306-15 TPS3306-15 TPS3306-18 TPS3306-18, TPS3306-20 TPS3306-20 TPS3306-25 TPS3306-25, TPS3306-33 TPS3306-33 www.ti.com SLVS290A SLVS290A ­ APRIL 2000 ­ REVISED MAY 2004 TIMING REQUIREMENTS at VDD = 2.7 V to 6 V, RL= 1 M, CL= 50 pF, TA= 25°C PARAMETER tw Pulse width TEST CONDITIONS SENSEn VSENSEnL = VIT - 0.2 V, VSENSEnH = VIT + 0.2 V WDI VIH = 0.7 × VDD, VIL= 0.3 × VDD MIN TYP MAX UNIT 6 µs 100 ns SWITCHING CHARACTERISTICS at VDD = 2.7 V to 6 V, RL= 1 M, CL = 50 pF, TA= 25°C PARAMETER TEST CONDITIONS tt(out) Watchdog time out VI(SENSEn) VIT + 0.2 V, See timing diagram td Delay time VI(SENSEn) VIT + 0.2 V, See timing diagram tPHL Propagation (delay) time, high-to-low level output tPHL Propagation (delay) time, high-to-low level output tPLH Propagation (delay) time, low-to-high level output 8 SENSEn to RESET PFI to PFO VIH = VIT + 0.2 V, VIL = VIT - 0.2 V MIN TYP MAX UNIT 0.5 0.8 1.2 s 70 100 140 ms 1 5 µs 0.5 1 µs TPS3306-15 TPS3306-15 TPS3306-18 TPS3306-18, TPS3306-20 TPS3306-20 TPS3306-25 TPS3306-25, TPS3306-33 TPS3306-33 www.ti.com SLVS290A SLVS290A ­ APRIL 2000 ­ REVISED MAY 2004 TYPICAL CHARACTERISTICS SUPPLY CURRENT vs SUPPLY VOLTAGE 18 1.005 16 VDD = 6 V 1.004 14 1.003 12 I DD - Supply Current - µ A Normalized Input Threshold Voltage - VIT(TA), VIT(25 °C ) NORMALIZED SENSE THRESHOLD VOLTAGE vs FREE-AIR TEMPERATURE AT VDD 1.002 1.001 1 0.999 0.998 0.997 TPS3306-33 TPS3306-33 10 8 6 4 2 0 -2 -4 SENSEn = VDD TA = 25°C -6 0.996 0.995 -40 -15 10 35 60 -8 -10 -0.5 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 85 TA - Free-Air Temperature - °C VDD - Supply Voltage - V Figure 2. Figure 3. LOW-LEVEL OUTPUT VOLTAGE vs LOW-LEVEL OUTPUT CURRENT LOW-LEVEL OUTPUT VOLTAGE vs LOW-LEVEL OUTPUT CURRENT 2.8 6.5 2 1.6 1.2 VDD = 6 V 6 85°C 0.8 -40°C 0.4 VOL - Low-Level Output Voltage - V VOL - Low-Level Output Voltage - V VDD = 2.7 V 2.4 5.5 5 4.5 4 3.5 3 85°C 2.5 2 1.5 -40°C 1 0.5 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 IOL - Low-Level Output Current - mA Figure 4. 0 0 5 10 15 20 25 30 35 40 45 50 55 60 IOL - Low-Level Output Current - mA Figure 5. 9 TPS3306-15 TPS3306-15 TPS3306-18 TPS3306-18, TPS3306-20 TPS3306-20 TPS3306-25 TPS3306-25, TPS3306-33 TPS3306-33 www.ti.com SLVS290A SLVS290A ­ APRIL 2000 ­ REVISED MAY 2004 TYPICAL CHARACTERISTICS (continued) MINIMUM PULSE DURATION AT SENSE vs THRESHOLD OVERDRIVE tw - Minimum Pulse Duration at Vsense - µ s 10 VDD = 6 V 9 8 7 6 5 4 3 2 1 0 0 10 100 200 300 400 500 600 700 800 900 1000 SENSE - Threshold Overdrive - mV Figure 6. PACKAGE OPTION ADDENDUM www.ti.com 4-Mar-2005 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Eco Plan (2) Qty TPS3306-15D TPS3306-15D ACTIVE SOIC D 8 Lead/Ball Finish MSL Peak Temp (3) 75 Pb-Free (RoHS) CU NIPDAU Level-2-260C-1YEAR/ Level-1-220C-UNLIM TPS3306-15DGK TPS3306-15DGK ACTIVE MSOP DGK 8 80 None CU NIPDAU Level-1-220C-UNLIM TPS3306-15DGKR TPS3306-15DGKR ACTIVE MSOP DGK 8 2500 None CU NIPDAU Level-1-220C-UNLIM TPS3306-15DGKRG4 TPS3306-15DGKRG4 PREVIEW MSOP DGK 8 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM TPS3306-15DR TPS3306-15DR ACTIVE SOIC D 8 2500 Pb-Free (RoHS) CU NIPDAU Level-2-260C-1YEAR/ Level-1-220C-UNLIM TPS3306-18D TPS3306-18D ACTIVE SOIC D 8 75 Pb-Free (RoHS) CU NIPDAU Level-2-260C-1YEAR/ Level-1-220C-UNLIM TPS3306-18DGK TPS3306-18DGK ACTIVE MSOP DGK 8 80 None CU NIPDAU Level-1-220C-UNLIM TPS3306-18DGKR TPS3306-18DGKR ACTIVE MSOP DGK 8 2500 None CU NIPDAU Level-1-220C-UNLIM TPS3306-18DR TPS3306-18DR ACTIVE SOIC D 8 2500 Pb-Free (RoHS) CU NIPDAU Level-2-260C-1YEAR/ Level-1-220C-UNLIM TPS3306-20D TPS3306-20D ACTIVE SOIC D 8 75 Pb-Free (RoHS) CU NIPDAU Level-2-260C-1YEAR/ Level-1-220C-UNLIM TPS3306-20DGK TPS3306-20DGK ACTIVE MSOP DGK 8 80 None CU NIPDAU Level-1-220C-UNLIM TPS3306-20DGKR TPS3306-20DGKR ACTIVE MSOP DGK 8 2500 None CU NIPDAU Level-1-220C-UNLIM TPS3306-20DR TPS3306-20DR ACTIVE SOIC D 8 2500 Pb-Free (RoHS) CU NIPDAU Level-2-260C-1YEAR/ Level-1-220C-UNLIM TPS3306-25D TPS3306-25D ACTIVE SOIC D 8 75 Pb-Free (RoHS) CU NIPDAU Level-2-260C-1YEAR/ Level-1-220C-UNLIM TPS3306-25DGK TPS3306-25DGK ACTIVE MSOP DGK 8 80 None CU NIPDAU Level-1-220C-UNLIM TPS3306-25DGKR TPS3306-25DGKR ACTIVE MSOP DGK 8 2500 None CU NIPDAU Level-1-220C-UNLIM TPS3306-25DR TPS3306-25DR ACTIVE SOIC D 8 2500 Pb-Free (RoHS) CU NIPDAU Level-2-260C-1YEAR/ Level-1-220C-UNLIM TPS3306-33D TPS3306-33D ACTIVE SOIC D 8 75 Pb-Free (RoHS) CU NIPDAU Level-2-260C-1YEAR/ Level-1-220C-UNLIM TPS3306-33DGK TPS3306-33DGK ACTIVE MSOP DGK 8 80 None CU NIPDAU Level-1-220C-UNLIM TPS3306-33DGKR TPS3306-33DGKR ACTIVE MSOP DGK 8 2500 None CU NIPDAU Level-1-220C-UNLIM TPS3306-33DR TPS3306-33DR ACTIVE SOIC D 8 2500 Pb-Free (RoHS) CU NIPDAU Level-2-260C-1YEAR/ Level-1-220C-UNLIM (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) Eco Plan - May not be currently available - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. None: Not yet available Lead (Pb-Free). Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Green (RoHS & no Sb/Br): TI defines "Green" to mean "Pb-Free" and in addition, uses package materials that do not contain halogens, including bromine (Br) or antimony (Sb) above 0.1% of total product weight. Addendum-Page 1 PACKAGE OPTION ADDENDUM www.ti.com 4-Mar-2005 (3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDECindustry standard classifications, and peak solder temperature. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. 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