Texas Instruments TPS77801PWPR, TPS77801PWP, TPS77801DR, TPS77801D, TPS77733PWP Datasheet

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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

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

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 PowerP AD  (PWP) Package

Thermal Shutdown Protection

description

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.

TA – Free-Air Temperature – °C

–40 0 20 120

–60 40 60 80 100

– Dropout Voltage – mV V

TPS77x33

DROPOUT VOLTAGE

FREE-AIR TEMPERATURE

–1

–2

–20 140

IO = 750 mA

IO = 10 mA

IO = 0

CO = 10 µF

t – Time – µs

TPS77x33

LOAD TRANSIENT RESPONSE

I – Output Current – mA

– Change in∆

Output Voltage – mV

500

604020 80 100 140120 160 180 200

–50

1000

CO = 2x47 µF ESR = 1/2x100 mΩ VO = 3.3 V VI = 4.3 V

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 Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.

NC – No internal connection

1 2 3 4 5 6 7 8 9 10

20 19 18 17 16 15 14 13 12 11

GND/HSINK GND/HSINK

GND

NC EN

IN IN

NC GND/HSINK GND/HSINK

GND/HSINK GND/HSINK NC NC RESET

/PG FB/NC OUT OUT GND/HSINK GND/HSINK

PWP PACKAGE

(TOP VIEW)

1 2 3 4

8 7 6 5

GND

IN IN

RESET

/PG FB/NC OUT OUT

D PACKAGE

(TOP VIEW)

PowerPAD is a trademark of Texas Instruments Incorporated.

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

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

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)

PACKAGED DEVICES

TYP

TSSOP

(PWP)

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

40 C to 125 C

Adjustable

1.5 V to 5.5 V

TPS77701PWP — TPS77701D —

Adjustable

1.2 V to 5.5 V

— TPS77801PWP — TPS77801D

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).

†

See application information section for capacitor selection details.

RESET/

OUT

GND

14 13

0.1 µF

RESET

/PG

10 µF

†

Figure 1. Typical Application Configuration for Fixed Output Options

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

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

functional block diagram—adjustable version

200 ms Delay

(for RESET

Option)

_ +

ref

= 1.1834 V

OUT

FB/NC

GND

PG or RESET

External to the device

functional block diagram—fixed-voltage version

_ +

ref

= 1.1834 V

OUT

GND

PG or RESET

200 ms Delay

(for RESET

Option)

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

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

Terminal Functions – SOIC Package (TPS777xx)

TERMINAL

NAME NO.

I/O

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 RESET 8 O RESET output

Terminal Functions – TSSOP Package (TPS777xx)

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 3 Regulator ground GND/HSINK 1, 2, 9, 10, 11,

12, 19, 20

Ground/heatsink

IN 6, 7 I Input NC 4, 8, 17, 18 No connect OUT 13, 14 O Regulated output voltage RESET 16 O RESET output

Terminal Functions – SOIC Package (TPS778xx)

TERMINAL

NAME NO.

I/O

DESCRIPTION

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 3 Regulator ground GND/HSINK 1, 2, 9, 10, 11,

12, 19, 20

Ground/heatsink

IN 6, 7 I Input NC 4, 8, 17, 18 No connect OUT 13, 14 O Regulated output voltage PG 16 O PG output

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

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

TPS777xx RESET timing diagram

†

res

is the minimum input voltage for a valid RESET . The symbol V

res

is not currently listed within EIA or JEDEC standards

for semiconductor symbology.

res

†

res

Threshold

Voltage

RESET Output

200 ms Delay

Output Undefined

Output

Undefined

IT+

‡

IT–

‡

IT–

‡

IT+

‡

Less than 5% of the output voltage

‡

VIT –Trip voltage is typically 5% lower than the output voltage (95%VO) V

IT–

to V

IT+

is the hysteresis voltage.

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

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

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 (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, T

–40°C to 125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Storage temperature range, T

stg

–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

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

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

PWP

300 4.3 W 34.6 mW/°C 2.8 W 2.2 W

0 3 W 23.8 mW/°C 1.9 W 1.5 W

PWP

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 MAX UNIT

Input voltage, V

2.7 10 V

TPS77701 1.5 5.5

Output voltage range, V

TPS77801 1.2 5.5

Output current, IO (Note 1) 0 750 mA Operating virtual junction temperature, TJ (Note 1) –40 125 °C

To calculate the minimum input voltage for your maximum output current, use the following equation: V

I(min)

= V

O(max)

+ V

DO(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.

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

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

electrical characteristics over recommended operating free-air temperature range, V

= V

O(typ)

+ 1 V, IO = 1 mA, EN = 0 V, CO = 10 µF (unless otherwise noted)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

1.5 V ≤ VO ≤ 5.5 V, TJ = 25°C V

TPS77701

1.5 V ≤ VO ≤ 5.5 V, TJ = –40°C to 125°C 0.98V

1.02V

1.2 V ≤ VO ≤ 5.5 V, TJ = 25°C V

TPS77801

1.2 V ≤ VO ≤ 5.5 V, TJ = –40°C to 125°C 0.98V

1.02V

TJ = 25°C, 2.7 V < VIN < 10 V 1.5

Output voltage

TPS77x15

TJ = –40°C to 125°C, 2.7 V < VIN < 10 V 1.470 1.530

(10 µA to 750 mA load) (see

Note 2

)

TJ = 25°C, 2.8 V < VIN < 10 V 1.8

(see Note 2)

TPS77x18

TJ = –40°C to 125°C, 2.8 V < VIN < 10 V 1.764 1.836 TJ = 25°C, 3.5 V < VIN < 10 V 2.5

TPS77x25

TJ = –40°C to 125°C, 3.5 V < VIN < 10 V 2.450 2.550 TJ = 25°C, 4.3 V < VIN < 10 V 3.3

TPS77x33

TJ = –40°C to 125°C, 4.3 V < VIN < 10 V 3.234 3.366 10 µA < IO < 750 mA, TJ = 25°C 85

Quiescent current (GND current) (see Note 2)

IO = 750 mA, TJ = –40°C to 125°C 125

Output voltage line regulation (∆VO/V

)

(see Notes 2 and 3)

VO + 1 V < VI ≤ 10 V, TJ = 25°C 0.01 %/V Load regulation 3 mV Output noise voltage

BW = 300 Hz to 50 kHz,

CO = 10 µF, TJ = 25°C

190 µVrms

Output current Limit VO = 0 V 1.7 2 A Thermal shutdown junction temperature 150 °C

EN = V

TJ = 25°C,

2.7 V < VI < 10 V

1 µA

Standby current

EN = V

TJ = –40°C to 125°C

2.7 V < VI < 10 V

10 µA

FB input current TPS77x01 FB = 1.5 V 2 nA High level enable input voltage 1.7 V Low level enable input voltage 0.9 V

Power supply ripple rejection (see Note 2)

f = 1 KHz, CO = 10 µF,

TJ = 25°C

60 dB

Minimum input voltage for valid RESET I

O(RESET)

= 300µA 1.1 V

Trip threshold voltage VO decreasing 92 98 %V

Reset

Hysteresis voltage Measured at V

0.5 %V

(TPS777xx)

Output low voltage VI = 2.7 V, I

O(RESET)

= 1mA 0.15 0.4 V

Leakage current V

(RESET)

= 5 V 1 µA RESET time-out delay 200 ms Minimum input voltage for valid PG I

O(PG)

= 300µA 1.1 V

Trip threshold voltage VO decreasing 92 98 %V

PG (

TPS778xx

)

Hysteresis voltage Measured at V

0.5 %V

(TPS778xx)

Output low voltage VI = 2.7 V, I

O(PG)

= 1mA 0.15 0.4 V

Leakage current V

(PG)

= 5 V 1 µA

NOTE 2: Minimum IN operating voltage is 2.7 V or V

O(typ)

+ 1 V, whichever is greater. Maximum IN voltage 10V.

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

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

electrical characteristics over recommended operating free-air temperature range, V

= V

O(typ)

+ 1 V, I

= 1 mA, EN = 0 V, CO = 10 µF (unless otherwise noted) (continued)

PARAMETER TEST CONDITIONS

MIN TYP MAX UNIT

EN = 0 V –1 0 1

Input current (EN)

EN = V

–1 1

IO = 750 mA, TJ = 25°C 260

Dropout voltage

TPS77733

IO = 750 mA, TJ = –40°C to 125°C 427

(See Note 4)

IO = 750 mA, TJ = 25°C 260

TPS77833

IO = 750 mA, TJ = –40°C to 125°C 427

NOTES: 3. If VO≤ 1.8 V then V

imin

= 2.7 V, V

imax

= 10 V:

Line Reg. (mV)

+ǒ%ńVǓ

imax

2.7 V

100

1000

If VO ≥ 2.5 V then V

imin

= VO + 1 V, V

imax

= 10 V:

Line Reg. (mV)

+ǒ%ńVǓ

imax

*ǒVO)

100

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

vs Output current 2, 3, 4

VOOutput voltage

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

VDODropout voltage

vs Free-air temperature 13 Line transient response 14, 16 Load transient response 15, 17 Output voltage vs Time 18 Equivalent series resistance (ESR) vs Output current 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

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

TYPICAL CHARACTERISTICS

Figure 2

IO – Output Current – A

TPS77x33

OUTPUT VOLTAGE

OUTPUT CURRENT

3.2830

3.2815

3.2800

0.125 0.375

3.2825

3.2820

3.2810

0.25

3.2835

– Output Voltage – V V

3.2805

0.5 0.675 0.75

VI = 4.3 V TA = 25°C

Figure 3

IO – Output Current – A

1.4975

1.4960

1.4950

1.4970

1.4965

1.4955

1.4985

– Output Voltage – V V

TPS77x15

OUTPUT VOLTAGE

OUTPUT CURRENT

1.4980

0.125 0.3750.250 0.5 0.675 0.75

VI = 2.7 V TA = 25°C

Figure 4

0.125 0.3750.250 0.5 0.675 0.75 IO – Output Current – A

TPS77x25

OUTPUT VOLTAGE

OUTPUT CURRENT

2.4955

2.4940

2.4920

2.4950

2.4945

2.4935

2.4960

– Output Voltage – V V

2.4930

2.4925

VI = 3.5 V TA = 25°C

Figure 5

TA – Free-Air Temperature – °C

TPS77x33

OUTPUT VOLTAGE

FREE-AIR TEMPERATURE

– Output Voltage – V V

3.31

3.28

3.25 –40 0

3.30

3.29

3.27

–20 100 140

3.32

–60 120

3.26

20 40 60 80

VI = 4.3 V

IO = 750 mA

IO = 1 mA

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

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

TYPICAL CHARACTERISTICS

Figure 6

TA – Free-Air Temperature – °C

TPS77x15

OUTPUT VOLTAGE

FREE-AIR TEMPERATURE

– Output Voltage – V V

1.515

1.500

1.485 –40 0

1.510

1.505

1.495

–20 100–60 120

1.490

20 40 60 80

VI = 2.7 V

IO = 750 mA

IO = 1 mA

140

Figure 7

TA – Free-Air Temperature – °C

TPS77x25

OUTPUT VOLTAGE

FREE-AIR TEMPERATURE

– Output Voltage – V V

–40 0–20 100–60 12020 40 60 80

2.515

2.500

2.480

2.510

2.505

2.495

2.490

2.485

VI = 3.5 V

IO = 750 mA

IO = 1 mA

Figure 8

TA – Free-Air Temperature – °C

TPS77xxx

GROUND CURRENT

FREE-AIR TEMPERATURE

Ground Current – Aµ

–40 0–20 100–60 12020 40 60 80 140

IO = 500 mA

100

IO = 1 mA

IO = 750 mA

Figure 9

100k10k

PSRR – Power Supply Ripple Rejection – dB

f – Frequency – Hz

POWER SUPPLY RIPPLE REJECTION

FREQUENCY

60 50 40

–10

TPS77x33

90 80

1k10010

VI = 4.3 V CO = 10 µF TA = 25°C

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

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

TYPICAL CHARACTERISTICS

Figure 10

TPS77x33

OUTPUT SPECTRAL NOISE DENSITY

FREQUENCY

f – Frequency – Hz

–5

–6

–8

–7

IO = 7 mA

IO = 750 mA

VI = 4.3 V CO = 10 µF TA = 25°C

V HzOutput Spectral Noise Density – µ

Figure 11

f – Frequency – kHz

– Output Impedance –Z

Ω

–1

–2

IO = 1 mA

IO = 750 mA

VI = 4.3 V CO = 10 µF TA = 25°C

TPS77x33

OUTPUT IMPEDANCE

FREQUENCY

Figure 12

VI – Input Voltage – V

600

300

500

400

200

3.52.5

– Dropout Voltage – mV

100

4.5 5

TA = 125°C

TA = –40°C

TA = 25°C

IO = 750 mA

TPS77x01

DROPOUT VOLTAGE

INPUT VOLTAGE

Figure 13

TA – Free-Air Temperature – °C

–40 0 20 120

–60 40 60 80 100

– Dropout Voltage – mV V

TPS77x33

DROPOUT VOLTAGE

FREE-AIR TEMPERATURE

–1

–2

–20 140

IO = 750 mA

IO = 10 mA

IO = 0

CO = 10 µF

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

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

TYPICAL CHARACTERISTICS

Figure 14

– Change in

3.7

2.7

TPS77x15

LINE TRANSIENT RESPONSE

t – Time – µs

0604020 80 100 140120 160 180 200

– Input Voltage – V

∆

Output Voltage – mV

CL = 10 µF TA = 25°C

–10

Figure 15

t – Time – µs

TPS77x15

LOAD TRANSIENT RESPONSE

I – Output Current – mA

– Change in∆

Output Voltage – mV

500

604020 80 100 140120 160 180 200

–50

1000

CO = 2x47 µF ESR = 1/2x100 mΩ VO = 1.5 V VI = 2.7 V

Figure 16

TPS77x33

LINE TRANSIENT RESPONSE

t – Time – µs

– Change in

– Input Voltage – V

∆

Output Voltage – mV

5.3

604020 80 100 140120 160 180 200

CL = 10 µF TA = 25°C

4.3

–10

Figure 17

t – Time – µs

TPS77x33

LOAD TRANSIENT RESPONSE

I – Output Current – mA

– Change in∆

Output Voltage – mV

500

604020 80 100 140120 160 180 200

–50

1000

CO = 2x47 µF ESR = 1/2x100 mΩ VO = 3.3 V VI = 4.3 V

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

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

TYPICAL CHARACTERISTICS

t – Time – µs

TPS77x33

OUTPUT VOLTAGE

TIME (AT STARTUP)

604020 80 100 140120 160 180 2000

– Output Voltage – V

Enable Pulse – V

Figure 18

OUT

GND

ESR

To Load

Figure 19. Test Circuit for Typical Regions of Stability (Figures 20 through 23) (Fixed Output Options)

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

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

TYPICAL CHARACTERISTICS

Figure 20

0.1 0 125 250 375 500 625

TYPICAL REGION OF STABILITY

EQUIVALENT SERIES RESISTANCE

†

OUTPUT CURRENT

IO – Output Current – mA

ESR – Equivalent series restance – Ω

750

Vo = 3.3 V CL = 4.7 µF VI = 4.3 V TA = 25°C

Region of Stability

Region of Instability

Figure 21

TYPICAL REGION OF STABILITY

EQUIVALENT SERIES RESISTANCE

†

OUTPUT CURRENT

IO – Output Current – mA

ESR – Equivalent Series Resistance –

Ω

0.1

0 125 250 375 500 625 750

Vo = 3.3 V Cl = 4.7 µF VI = 4.3 V TJ = 125°C

Region of Stability

Region of Instability

Figure 22

0.1

TYPICAL REGION OF STABILITY

EQUIVALENT SERIES RESISTANCE

†

OUTPUT CURRENT

IO – Output Current – mA

ESR – Equivalent series restance – Ω

0 125 250 375 500 625 750

Region of Instability

Region of Stability

Vo = 3.3 V CL = 22 µF VI = 4.3 V TA = 25°C

Figure 23

TYPICAL REGION OF STABILITY

EQUIVALENT SERIES RESISTANCE

†

OUTPUT CURRENT

0.1

IO – Output Current – mA

ESR – Equivalent series restance – Ω

0 125 250 375 500 625 750

Vo = 3.3 V Cl = 22 µF VI = 4.3 V TJ = 125°C

Region of Stability

Region of Instability

†

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.

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

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

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.

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

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

APPLICATION INFORMATION

external capacitor requirements (continued)

RESET/

OUT

IN IN

GND

14 13

0.1 µF

RESET

/PG

10 µF

250 kΩ

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:

VO+

ref

ǒ1

)

R1 R2

(1)

Where

ref

= 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:

ref

(2)

OUTPUT

VOLTAGE

R1 R2

2.5 V

3.3 V

3.6 V

4.75 V

UNIT

121 196 226 332

110 110 110 110

kΩ kΩ kΩ kΩ

OUTPUT VOLTAGE

PROGRAMMING GUIDE

RESET

OUT

FB / NC

GND

≤ 0.9 V

≥ 1.7 V

TPS77x01

Reset or PG Output

0.1 µF 250 kΩ

Figure 25. TPS77x01 Adjustable LDO Regulator Programming

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

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

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.

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

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

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. T o ensure the junction temperature is within acceptable limits, calculate the maximum allowable dissipation, P

D(max)

, and the actual dissipation, PD, which must be less than

or equal to P

D(max)

The maximum-power-dissipation limit is determined using the following equation:

D(max)

TJmax*T

Where

max is the maximum allowable junction temperature

is the ambient temperature.

θJA

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.

The regulator dissipation is calculated using:

PD+

VI*

Power dissipation resulting from quiescent current is negligible. Excessive power dissipation will trigger the thermal protection circuit.

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

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

MECHANICAL DATA

D (R-PDSO-G**) PLASTIC SMALL-OUTLINE PACKAGE

14 PIN SHOWN

4040047/B 03/95

0.228 (5,80)

0.244 (6,20)

0.069 (1,75) MAX

0.010 (0,25)

0.004 (0,10)

0.014 (0,35)

0.020 (0,51)

0.157 (4,00)

0.150 (3,81)

0.044 (1,12)

0.016 (0,40)

Seating Plane

0.010 (0,25)

PINS **

0.008 (0,20) NOM

A MIN

A MAX

DIM

Gage Plane

0.189

(4,80)

(5,00)

0.197

(8,55)

(8,75)

0.337

0.344

(9,80)

0.394

(10,00)

0.386

0.004 (0,10)

0.010 (0,25)

0.050 (1,27)

0°–8°

NOTES: A. All linear dimensions are in inches (millimeters).

B. This drawing is subject to change without notice. C. Body dimensions do not include mold flash or protrusion, not to exceed 0.006 (0,15). D. Four center pins are connected to die mount pad. E. Falls within JEDEC MS-012

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

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

MECHANICAL DATA

PWP (R-PDSO-G**) PowerPAD PLASTIC SMALL-OUTLINE PACKAGE

4073225/E 03/97

0,50

0,75

0,25

0,15 NOM

Thermal Pad (See Note D)

Gage Plane

2824

7,70

7,90

6,40

6,60

9,60

9,80

6,60 6,20

0,19

4,50 4,30

0,15

0,30

1,20 MAX

1614

5,10

4,90

PINS **

4,90

5,10

DIM

A MIN

A MAX

0,05

Seating Plane

0,65

0,10

0°–8°

20-PIN SHOWN

NOTES: A. All linear dimensions are in millimeters.

B. This drawing is subject to change without notice. C. Body dimensions do not include mold flash or protrusions. D. 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.

IMPORTANT NOTICE

T exas 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.

CERT AIN 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 APPLICA TIONS IS UNDERSTOOD T O BE FULLY AT THE CUSTOMER’S RISK.

In order to minimize risks associated with the customer’s applications, adequate design and operating safeguards must be provided by the customer to minimize inherent or procedural hazards.

TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other intellectual property right of TI covering or relating to any combination, machine, or process in which such semiconductor products or services might be or are used. TI’s publication of information regarding any third party’s products or services does not constitute TI’s approval, warranty or endorsement thereof.

Texas Instruments TPS77801PWPR, TPS77801PWP, TPS77801DR, TPS77801D, TPS77733PWP Datasheet

Specifications and Main Features

Frequently Asked Questions

User Manual