TPS77701, TPS77715, TPS77718, TPS77725, TPS77733 WITH RESET OUTPUT TPS77801, TPS77815, TPS77818, TPS77825, TPS77833 WITH PG OUTPUT FAST-TRANSIENT-RESPONSE 750-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS230A – SEPTEMBER 1999 – REVISED SEPTEMBER 1999 D D D D D D D D D D Open Drain Power-On Reset With 200-ms Delay (TPS777xx) Open Drain Power Good (TPS778xx) 750-mA Low-Dropout Voltage Regulator Available in 1.5-V, 1.8-V, 2.5-V, 3.3-V Fixed Output and Adjustable Versions Dropout Voltage to 260 mV (Typ) at 750 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 PowerPAD (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 100 10–1 IO = 0 CO = 10 µF 10–2 –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 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) TPS777xx and TPS778xx 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 = 750 mA 20 2 NC – No internal connection description 102 1 CO = 2x47 µF ESR = 1/2x100 mΩ VO = 3.3 V VI = 4.3 V 50 0 –50 1000 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 TPS77701, TPS77715, TPS77718, TPS77725, TPS77733 WITH RESET OUTPUT TPS77801, TPS77815, TPS77818, TPS77825, TPS77833 WITH PG OUTPUT FAST-TRANSIENT-RESPONSE 750-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS230A – SEPTEMBER 1999 – REVISED SEPTEMBER 1999 description (continued) Because the PMOS device behaves as a low-value resistor, the dropout voltage is very low (typically 260 mV at an output current of 750 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 750 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 TPS777xx initiates a reset in microcomputer and microprocessor systems in the event of an undervoltage condition. An internal comparator in the TPS777xx monitors the output voltage of the regulator to detect an undervoltage condition on the regulated output voltage. Power good (PG) of the TPS778xx is an active high output, which can be used to implement a power-on reset or a low-battery indicator. The TPS777xx and TPS778xx are offered in 1.5-V, 1.8-V, 2.5-V, 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 TPS77701 option and 1.2 V to 5.5 V for TPS77801 option). Output voltage tolerance is specified as a maximum of 2% over line, load, and temperature ranges. The TPS777xx and TPS778xx families are available in 8 pin SOIC and 20 pin PWP packages. AVAILABLE OPTIONS OUTPUT VOLTAGE (V) TJ PACKAGED DEVICES TSSOP (PWP) TYP SOIC (D) 3.3 TPS77733PWP TPS77833PWP TPS77733D TPS77833D 2.5 TPS77725PWP TPS77825PWP TPS77725D TPS77825D 1.8 TPS77718PWP TPS77818PWP TPS77718D TPS77818D 1.5 TPS77715PWP TPS77815PWP TPS77715D TPS77815D Adjustable 1.5 V to 5.5 V TPS77701PWP — TPS77701D — Adjustable 1.2 V to 5.5 V — TPS77801PWP — TPS77801D – 40 40°C C to 125 125°C C 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., TPS77701DR). VI 6 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 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TPS77701, TPS77715, TPS77718, TPS77725, TPS77733 WITH RESET OUTPUT TPS77801, TPS77815, TPS77818, TPS77825, TPS77833 WITH PG OUTPUT FAST-TRANSIENT-RESPONSE 750-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS230A – SEPTEMBER 1999 – REVISED SEPTEMBER 1999 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 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 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 3 TPS77701, TPS77715, TPS77718, TPS77725, TPS77733 WITH RESET OUTPUT TPS77801, TPS77815, TPS77818, TPS77825, TPS77833 WITH PG OUTPUT FAST-TRANSIENT-RESPONSE 750-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS230A – SEPTEMBER 1999 – REVISED SEPTEMBER 1999 Terminal Functions – SOIC Package (TPS777xx) 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 Terminal Functions – TSSOP Package (TPS777xx) 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 Regulator ground 1, 2, 9, 10, 11, 12, 19, 20 Ground/heatsink GND/HSINK IN 6, 7 NC 4, 8, 17, 18 OUT I Input No connect 13, 14 O Regulated output voltage 16 O RESET output RESET Terminal Functions – SOIC Package (TPS778xx) 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 Terminal Functions – TSSOP Package (TPS778xx) 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 4 I Input No connect 13, 14 O Regulated output voltage 16 O PG output POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TPS77701, TPS77715, TPS77718, TPS77725, TPS77733 WITH RESET OUTPUT TPS77801, TPS77815, TPS77818, TPS77825, TPS77833 WITH PG OUTPUT FAST-TRANSIENT-RESPONSE 750-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS230A – SEPTEMBER 1999 – REVISED SEPTEMBER 1999 TPS777xx RESET timing diagram VI Vres† Vres t VO VIT +‡ VIT +‡ Threshold Voltage VIT –‡ Less than 5% of the output voltage VIT –‡ t RESET Output ÎÎ ÎÎ ÎÎ ÎÎ ÎÎ 200 ms Delay 200 ms Delay Output Undefined ÎÎ ÎÎ ÎÎ ÎÎ ÎÎ 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. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 5 TPS77701, TPS77715, TPS77718, TPS77725, TPS77733 WITH RESET OUTPUT TPS77801, TPS77815, TPS77818, TPS77825, TPS77833 WITH PG OUTPUT FAST-TRANSIENT-RESPONSE 750-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS230A – SEPTEMBER 1999 – REVISED SEPTEMBER 1999 absolute maximum ratings over operating free-air temperature range (unless otherwise noted)Ĕ 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 (TPS777xx) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.5 V Maximum PG voltage (TPS778xx) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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 PACKAGE 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 250 904 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. recommended operating conditions MIN Input voltage, VIk Output voltage range, range VO Output current, IO (Note 1) Operating virtual junction temperature, TJ (Note 1) MAX UNIT 2.7 10 TPS77701 1.5 5.5 V TPS77801 1.2 5.5 0 750 mA – 40 125 °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. 6 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TPS77701, TPS77715, TPS77718, TPS77725, TPS77733 WITH RESET OUTPUT TPS77801, TPS77815, TPS77818, TPS77825, TPS77833 WITH PG OUTPUT FAST-TRANSIENT-RESPONSE 750-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS230A – SEPTEMBER 1999 – REVISED SEPTEMBER 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 TPS77701 TPS77801 Output voltage (10 µA to 750 mA load) (see Note 2) 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 TJ = 25°C, TJ = –40°C to 125°C, 2.7 V < VIN < 10 V TPS77x18 TJ = 25°C, TJ = –40°C to 125°C, 2.8 V < VIN < 10 V TPS77x25 TJ = 25°C, TJ = –40°C to 125°C, 3.5 V < VIN < 10 V TPS77x33 TJ = 25°C, TJ = –40°C to 125°C, 4.3 V < VIN < 10 V 2.7 V < VIN < 10 V 2.8 V < VIN < 10 V 3.5 V < VIN < 10 V 4.3 V < VIN < 10 V Quiescent current (GND current) (see Note 2) 10 µA < IO < 750 mA, TJ = 25°C IO = 750 mA, TJ = –40°C to 125°C Output voltage line regulation (∆VO/VO) (see Notes 2 and 3) VO + 1 V < VI ≤ 10 V, TJ = 25°C MIN BW = 300 Hz to 50 kHz, CO = 10 µF, TJ = 25°C Output current Limit VO = 0 V 0.98VO Standby current FB input current TPS77x01 1.02VO 0.98VO 1.02VO 1.5 1.470 1.530 1.8 1.764 EN = VI, TJ = –40°C to 125°C 2.7 V < VI < 10 V 1.836 2.450 2.550 3.3 3.234 3.366 85 125 %/V 3 mV 1 µA 2 Minimum input voltage for valid RESET Trip threshold voltage VO decreasing Hysteresis voltage Measured at VO Output low voltage VI = 2.7 V, Leakage current V(RESET) = 5 V CO = 10 µF, V 60 Minimum input voltage for valid PG IO(PG) = 300µA Trip threshold voltage VO decreasing Hysteresis voltage Measured at VO Output low voltage VI = 2.7 V, 0.5 %VO 0.4 V 1 µA ms 1.1 V 98 0.5 IO(PG) = 1mA • DALLAS, TEXAS 75265 %VO 200 92 Leakage current V(PG) = 5 V NOTE 2: Minimum IN operating voltage is 2.7 V or VO(typ) + 1 V, whichever is greater. Maximum IN voltage 10V. POST OFFICE BOX 655303 V 98 0.15 V dB 1.1 92 IO(RESET) = 1mA µA nA 0.9 f = 1 KHz, TJ = 25°C IO(RESET) = 300µA A °C 10 RESET time-out delay PG (TPS778xx) 2 150 Low level enable input voltage Reset (TPS777xx) µVrms 1.7 Power supply ripple rejection (see Note 2) µA 0.01 190 FB = 1.5 V High level enable input voltage V 2.5 1.7 TJ = 25°C, 2.7 V < VI < 10 V UNIT VO Thermal shutdown junction temperature EN = VI, MAX VO Load regulation Output noise voltage TYP range, 0.15 %VO %VO 0.4 V 1 µA 7 TPS77701, TPS77715, TPS77718, TPS77725, TPS77733 WITH RESET OUTPUT TPS77801, TPS77815, TPS77818, TPS77825, TPS77833 WITH PG OUTPUT FAST-TRANSIENT-RESPONSE 750-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS230A – SEPTEMBER 1999 – REVISED SEPTEMBER 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 Input current (EN) MIN TYP MAX EN = 0 V –1 0 1 EN = VI –1 IO = 750 mA, IO = 750 mA, TJ = 25°C TJ = –40°C to 125°C 260 TPS77833 IO = 750 mA, IO = 750 mA, TJ = 25°C TJ = –40°C to 125°C 260 NOTES: 3. If VO ≤ 1.8 V then Vimin = 2.7 V, Vimax = 10 V: Line Reg. (mV) + ǒ%ńVǓ V O If VO ≥ 2.5 V then Vimin = VO + 1 V, Vimax = 10 V: Line Reg. (mV) + ǒ%ńVǓ V O ǒ V ǒ * 2.7 V imax 100 V imax * ǒ V O Ǔ µA 427 mV 427 1000 )1 V 100 UNIT 1 TPS77733 Dropout voltage g (See Note 4) range, ǓǓ 1000 4. IN voltage equals VO(Typ) – 100 mV; TPS77x01 output voltage set to 3.3 V nominal with external resistor divider. 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 Zo VDO Output voltage vs Output current 2, 3, 4 vs Free-air temperature 5, 6, 7 Ground current vs Free-air temperature 8 Power supply ripple rejection vs Frequency 9 Output spectral noise density vs Frequency 10 Output impedance vs Frequency 11 vs Input voltage 12 Dropout voltage vs Free-air temperature Line transient response Load transient response 8 13 14, 16 15, 17 Output voltage vs Time Equivalent series resistance (ESR) vs Output current POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 18 20 – 23 TPS77701, TPS77715, TPS77718, TPS77725, TPS77733 WITH RESET OUTPUT TPS77801, TPS77815, TPS77818, TPS77825, TPS77833 WITH PG OUTPUT FAST-TRANSIENT-RESPONSE 750-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS230A – SEPTEMBER 1999 – REVISED SEPTEMBER 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 0.125 0.5 0.25 0.375 IO – Output Current – A 0.675 0 0.75 0.125 0.25 0.375 0.5 0.675 0.75 IO – Output Current – A Figure 2 Figure 3 TPS77x25 TPS77x33 OUTPUT VOLTAGE vs OUTPUT CURRENT OUTPUT VOLTAGE vs FREE-AIR TEMPERATURE 2.4960 3.32 VI = 4.3 V VI = 3.5 V TA = 25°C 2.4955 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 = 750 mA IO = 1 mA 3.28 3.27 3.26 2.4925 2.4920 0 0.125 0.25 0.375 0.5 0.675 0.75 3.25 –60 –40 –20 0 20 40 60 80 100 120 140 TA – Free-Air Temperature – °C IO – Output Current – A Figure 4 Figure 5 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 9 TPS77701, TPS77715, TPS77718, TPS77725, TPS77733 WITH RESET OUTPUT TPS77801, TPS77815, TPS77818, TPS77825, TPS77833 WITH PG OUTPUT FAST-TRANSIENT-RESPONSE 750-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS230A – SEPTEMBER 1999 – REVISED SEPTEMBER 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 = 750 mA IO = 1 mA 1.495 1.490 2.505 2.500 IO = 750 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 TPS77xxx 60 80 100 120 TPS77x33 90 IO = 500 mA IO = 1 mA 85 IO = 750 mA 80 75 –60 –40 –20 PSRR – Power Supply Ripple Rejection – dB 95 Ground Current – µ A 40 POWER SUPPLY RIPPLE REJECTION vs FREQUENCY 100 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 Figure 9 POST OFFICE BOX 655303 10k f – Frequency – Hz Figure 8 10 20 Figure 7 GROUND CURRENT vs FREE-AIR TEMPERATURE 90 0 TA – Free-Air Temperature – °C • DALLAS, TEXAS 75265 100k 1M TPS77701, TPS77715, TPS77718, TPS77725, TPS77733 WITH RESET OUTPUT TPS77801, TPS77815, TPS77818, TPS77825, TPS77833 WITH PG OUTPUT FAST-TRANSIENT-RESPONSE 750-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS230A – SEPTEMBER 1999 – REVISED SEPTEMBER 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 – Ω Output Spectral Noise Density – µV Hz 10–5 IO = 7 mA 10–6 IO = 750 mA 10–7 10–8 102 103 104 105 IO = 1 mA 10–1 IO = 750 mA 10–2 101 102 103 104 f – Frequency – kHz f – Frequency – Hz Figure 10 105 106 Figure 11 TPS77x33 DROPOUT VOLTAGE vs FREE-AIR TEMPERATURE TPS77x01 DROPOUT VOLTAGE vs INPUT VOLTAGE 600 103 IO = 750 mA VDO – Dropout Voltage – mV VDO – Dropout Voltage – mV 500 400 TA = 125°C TA = 25°C 300 200 TA = –40°C 100 102 IO = 750 mA 101 IO = 10 mA 100 10–1 IO = 0 CO = 10 µF 0 2.5 3 4 3.5 VI – Input Voltage – V 4.5 5 10–2 –60 –40 –20 0 20 40 60 80 100 120 140 TA – Free-Air Temperature – °C Figure 12 Figure 13 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 11 TPS77701, TPS77715, TPS77718, TPS77725, TPS77733 WITH RESET OUTPUT TPS77801, TPS77815, TPS77818, TPS77825, TPS77833 WITH PG OUTPUT FAST-TRANSIENT-RESPONSE 750-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS230A – SEPTEMBER 1999 – REVISED SEPTEMBER 1999 TPS77x15 LOAD TRANSIENT RESPONSE ∆ VO – Change in Output Voltage – mV TPS77x15 LINE TRANSIENT RESPONSE 3.7 2.7 I O – Output Current – mA ∆ VO – Change in Output Voltage – mV VI – Input Voltage – V TYPICAL CHARACTERISTICS 10 0 CL = 10 µF TA = 25°C –10 0 20 40 60 CO = 2x47 µF ESR = 1/2x100 mΩ VO = 1.5 V VI = 2.7 V 50 0 –50 1000 500 0 80 100 120 140 160 180 200 t – Time – µs 0 20 40 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 20 40 60 80 100 120 140 160 180 200 t – Time – µs CO = 2x47 µF ESR = 1/2x100 mΩ VO = 3.3 V VI = 4.3 V 50 0 –50 1000 500 0 0 20 40 60 80 100 120 140 160 180 200 t – Time – µs Figure 17 Figure 16 12 80 100 120 140 160 180 200 t – Time – µs Figure 15 Figure 14 0 60 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TPS77701, TPS77715, TPS77718, TPS77725, TPS77733 WITH RESET OUTPUT TPS77801, TPS77815, TPS77818, TPS77825, TPS77833 WITH PG OUTPUT FAST-TRANSIENT-RESPONSE 750-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS230A – SEPTEMBER 1999 – REVISED SEPTEMBER 1999 TYPICAL CHARACTERISTICS TPS77x33 OUTPUT VOLTAGE vs TIME (AT STARTUP) VO– Output Voltage – V 4 3 2 1 Enable Pulse – V 0 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) POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 13 TPS77701, TPS77715, TPS77718, TPS77725, TPS77733 WITH RESET OUTPUT TPS77801, TPS77815, TPS77818, TPS77825, TPS77833 WITH PG OUTPUT FAST-TRANSIENT-RESPONSE 750-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS230A – SEPTEMBER 1999 – REVISED SEPTEMBER 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 – Ω ESR – Equivalent series restance – Ω 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 0 125 250 375 500 625 Region of Instability 1 Region of Stability Vo = 3.3 V Cl = 4.7 µF VI = 4.3 V TJ = 125°C 0.1 750 0 125 IO – Output Current – mA 250 Figure 20 500 625 750 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 – Ω ESR – Equivalent series restance – Ω 375 IO – Output Current – mA Region of Instability 1 Region of Stability 0.1 0 Vo = 3.3 V CL = 22 µF VI = 4.3 V TA = 25°C 125 250 375 500 625 750 Region of Instability 1 Region of Stability Vo = 3.3 V Cl = 22 µF VI = 4.3 V TJ = 125°C 0.1 0 125 IO – Output Current – mA 250 375 500 625 750 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. 14 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TPS77701, TPS77715, TPS77718, TPS77725, TPS77733 WITH RESET OUTPUT TPS77801, TPS77815, TPS77818, TPS77825, TPS77833 WITH PG OUTPUT FAST-TRANSIENT-RESPONSE 750-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS230A – SEPTEMBER 1999 – REVISED SEPTEMBER 1999 APPLICATION INFORMATION The TPS777xx and TPS778xx families include four fixed-output voltage regulators (1.5 V, 1.8 V, 2.5 V, and 3.3 V), and an adjustable regulator, the TPS77x01 (adjustable from 1.5 V to 5.5 V for TPS77701 option and 1.2 V to 5.5 V for TPS77801 option). device operation The TPS777xx and TPS778xx 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/β). The TPS777xx and TPS778xx 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 β 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 TPS777xx and TPS778xx quiescent currents remain low even when the regulator drops out, eliminating both problems. The TPS777xx and TPS778xx 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 TPS777xx and TPS778xx 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 TPS777xx or TPS778xx 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 TPS777xx and TPS778xx 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 mΩ and 1.5 Ω. Capacitor values 10 µF or larger are acceptable, provided the ESR is less than 1.5 Ω. Solid tantalum electrolytic, aluminum electrolytic, and multilayer ceramic capacitors are all suitable, provided they meet the requirements described previously. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 15 TPS77701, TPS77715, TPS77718, TPS77725, TPS77733 WITH RESET OUTPUT TPS77801, TPS77815, TPS77818, TPS77825, TPS77833 WITH PG OUTPUT FAST-TRANSIENT-RESPONSE 750-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS230A – SEPTEMBER 1999 – REVISED SEPTEMBER 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 kΩ 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 ǒ) Ǔ + 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 kΩ to set the divider current at approximately 10 µA and then calculate R1 using: R1 + ǒ Ǔ V V O ref *1 (2) R2 OUTPUT VOLTAGE PROGRAMMING GUIDE TPS77x01 VI 0.1 µF IN RESET/ PG 250 kΩ ≥ 1.7 V ≤ 0.9 V Reset or PG Output EN OUT VO R1 FB / NC GND CO OUTPUT VOLTAGE R1 121 110 kΩ 3.3 V 196 110 kΩ 3.6 V 226 110 kΩ 4.75 V 332 110 kΩ R2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 UNIT 2.5 V Figure 25. TPS77x01 Adjustable LDO Regulator Programming 16 R2 TPS77701, TPS77715, TPS77718, TPS77725, TPS77733 WITH RESET OUTPUT TPS77801, TPS77815, TPS77818, TPS77825, TPS77833 WITH PG OUTPUT FAST-TRANSIENT-RESPONSE 750-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS230A – SEPTEMBER 1999 – REVISED SEPTEMBER 1999 APPLICATION INFORMATION reset indicator The TPS777xx 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 TPS778xx 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 TPS777xx and TPS778xx 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 TPS777xx and TPS778xx also feature internal current limiting and thermal protection. During normal operation, the TPS777xx and TPS778xx 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. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 17 TPS77701, TPS77715, TPS77718, TPS77725, TPS77733 WITH RESET OUTPUT TPS77801, TPS77815, TPS77818, TPS77825, TPS77833 WITH PG OUTPUT FAST-TRANSIENT-RESPONSE 750-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS230A – SEPTEMBER 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 D(max) * TA + TJmax R qJA Where TJmax is the maximum allowable junction temperature RθJA 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. ǒ Ǔ 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. 18 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TPS77701, TPS77715, TPS77718, TPS77725, TPS77733 WITH RESET OUTPUT TPS77801, TPS77815, TPS77818, TPS77825, TPS77833 WITH PG OUTPUT FAST-TRANSIENT-RESPONSE 750-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS230A – SEPTEMBER 1999 – REVISED SEPTEMBER 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. 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 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 19 TPS77701, TPS77715, TPS77718, TPS77725, TPS77733 WITH RESET OUTPUT TPS77801, TPS77815, TPS77818, TPS77825, TPS77833 WITH PG OUTPUT FAST-TRANSIENT-RESPONSE 750-mA LOW-DROPOUT VOLTAGE REGULATORS SLVS230A – SEPTEMBER 1999 – REVISED SEPTEMBER 1999 MECHANICAL DATA PWP (R-PDSO-G**) PowerPAD PLASTIC SMALL-OUTLINE PACKAGE 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 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 PowerPAD is a trademark of Texas Instruments Incorporated. 20 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 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. CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL APPLICATIONS”). TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, AUTHORIZED, OR WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT DEVICES OR SYSTEMS OR OTHER CRITICAL APPLICATIONS. INCLUSION OF TI PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO BE FULLY AT THE CUSTOMER’S RISK. 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