TEXAS INSTRUMENTS TMS77701 Technical data

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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

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

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.

PWP PACKAGE

(TOP VIEW)

NC EN

IN IN

1 2 3 4 5 6 7 8 9 10

D PACKAGE

(TOP VIEW)

1 2 3 4

GND/HSINK GND/HSINK

GND

GND/HSINK GND/HSINK

NC – No internal connection

GND

GND/HSINK

RESET

FB/NC

OUT

GND/HSINK

RESET

FB/NC

OUT

6 5

OUT

/PG

TPS77x33

DROPOUT VOLTAGE

FREE-AIR TEMPERATURE

– Dropout Voltage – mV

–1

CO = 10 µF

–2

–40 0 20 120

–60 40 60 80 100

–20 140

TA – Free-Air Temperature – °C

IO = 750 mA

IO = 10 mA

IO = 0

LOAD TRANSIENT RESPONSE

CO = 2x47 µF ESR = 1/2x100 mΩ

VO = 3.3 V VI = 4.3 V

– Change in∆

–50

Output Voltage – mV

1000

500

I – Output Current – mA

TPS77x33

604020 80 100 140120 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.

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

TPS77701, TPS77715, TPS77718, TPS77725, TPS77733 WITH RESET OUTPUT

40 C to 125 C

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 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

–

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).

(V)

TYP

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 Adjustable

1.2 V to 5.5 V

TPS77701PWP — TPS77701D —

TSSOP

(PWP)

— TPS77801PWP — TPS77801D

(enable) shuts down the regulator, reducing the

PACKAGED DEVICES

SOIC

(D)

0.1 µF

†

See application information section for capacitor selection details.

6 7

RESET/

GND

OUT OUT

14 13

RESET

10 µF

/PG

†

Figure 1. Typical Application Configuration for Fixed Output Options

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

functional block diagram—adjustable version

SLVS230A – SEPTEMBER 1999 – REVISED SEPTEMBER 1999

PG or RESET

= 1.1834 V

ref

+ _

GND

200 ms Delay

(for RESET

Option)

functional block diagram—fixed-voltage version

_ +

OUT

FB/NC

External to the device

PG or RESET

OUT

= 1.1834 V

ref

+ _

GND

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

200 ms Delay

(for RESET

Option)

TPS77701, TPS77715, TPS77718, TPS77725, TPS77733 WITH RESET OUTPUT

I/O

DESCRIPTION

I/O

DESCRIPTION

I/O

DESCRIPTION

I/O

DESCRIPTION

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 NO.

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.

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

Ground/heatsink

Terminal Functions – SOIC Package (TPS778xx)

TERMINAL

NAME NO.

Terminal Functions – TSSOP Package (TPS778xx)

TERMINAL

NAME NO.

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

Ground/heatsink

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

TPS777xx RESET timing diagram

†

res

SLVS230A – SEPTEMBER 1999 – REVISED SEPTEMBER 1999

res

Threshold

Voltage

RESET Output

Output

Undefined

†

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

res

for semiconductor symbology.

‡

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

is the hysteresis voltage.

IT+

‡

IT+

‡

IT–

200 ms Delay

IT+

Less than 5% of the output voltage

res

‡

IT–

200 ms Delay

Output Undefined

is not currently listed within EIA or JEDEC standards

IT–

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

TPS77701, TPS77715, TPS77718, TPS77725, TPS77733 WITH RESET OUTPUT

PWP

Output voltage range, V

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)

Input voltage range‡, VI –0.3 V to 13.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Voltage range at EN –0.3 V to 16.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Maximum RESET

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 Storage temperature range, T

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.

PACKAGE

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.

voltage (TPS777xx) 16.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

–65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

stg

DISSIPATION RATING TABLE 1 – FREE-AIR TEMPERATURES

AIR FLOW

(CFM)

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

AIR FLOW

(CFM)

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 3 W 23.8 mW/°C 1.9 W 1.5 W

300 7.2 W 57.9 mW/°C 4.6 W 3.8 W

TA < 25°C

POWER RATING

TA < 25°C

POWER RATING

DERATING FACTOR

ABOVE TA = 25°C

DERATING FACTOR

ABOVE TA = 25°C

TA = 70°C

POWER RATING

TA = 70°C

POWER RATING

TA = 85°C

POWER RATING

TA = 85°C

POWER RATING

recommended operating conditions

Input voltage, V

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

NOTE 1: Continuous current and operating junction temperature are limited by internal protection circuitry, but it is not recommended that the

device operate under conditions beyond those specified in this table for extended periods of time.

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

TPS77701 1.5 5.5 TPS77801 1.2 5.5

I(min)

MIN MAX UNIT

2.7 10 V

= V

O(max)

+ V

DO(max load)

TPS77701

TPS77801

TPS77x15

(10 µA to 750 mA load) (see

)

(see Note 2)

TPS77x18

TPS77x25

TPS77x33

Quiescent current (GND current) (see Note 2)

Standby current PG (

)

(TPS778xx)

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 range, V

= V

Output voltage

Note 2

Output voltage line regulation (∆VO/V (see Notes 2 and 3)

Load regulation 3 mV Output noise voltage Output current Limit VO = 0 V 1.7 2 A

Thermal shutdown junction temperature 150 °C

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)

Reset (TPS777xx)

TPS778xx

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

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

O(typ)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

1.5 V ≤ VO ≤ 5.5 V, TJ = 25°C V

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

1.2 V ≤ VO ≤ 5.5 V, TJ = 25°C V

1.2 V ≤ VO ≤ 5.5 V, TJ = –40°C to 125°C 0.98V TJ = 25°C, 2.7 V < VIN < 10 V 1.5 TJ = –40°C to 125°C, 2.7 V < VIN < 10 V 1.470 1.530 TJ = 25°C, 2.8 V < VIN < 10 V 1.8 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 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 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 IO = 750 mA, TJ = –40°C to 125°C 125

)

Minimum input voltage for valid RESET I Trip threshold voltage VO decreasing 92 98 %V Hysteresis voltage Measured at V Output low voltage VI = 2.7 V, I Leakage current V RESET time-out delay 200 ms Minimum input voltage for valid PG I Trip threshold voltage VO decreasing 92 98 %V Hysteresis voltage Measured at V Output low voltage VI = 2.7 V, I Leakage current V

VO + 1 V < VI ≤ 10 V, TJ = 25°C 0.01 %/V

BW = 300 Hz to 50 kHz, CO = 10 µF, TJ = 25°C

EN = V

f = 1 KHz, CO = 10 µF, TJ = 25°C

O(RESET)

(RESET)

O(PG)

(PG)

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

O(typ)

= 300µA 1.1 V

= 5 V 1 µA

= 300µA 1.1 V

= 5 V 1 µA

TJ = 25°C,

2.7 V < VI < 10 V TJ = –40°C to 125°C

2.7 V < VI < 10 V

O(RESET)

O(PG)

= 1mA 0.15 0.4 V

190 µVrms

1 µA

60 dB

0.5 %V

1.02V

10 µA

O O

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

TPS77701, TPS77715, TPS77718, TPS77725, TPS77733 WITH RESET OUTPUT

Input current (EN)

TPS77733

TPS77833

VOOutput voltage

VDODropout voltage

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 range, V

= V

Dropout voltage (See Note 4)

NOTES: 3. If VO≤ 1.8 V then V

O(typ)

+ 1 V, I

PARAMETER TEST CONDITIONS

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

EN = 0 V –1 0 1 EN = V

IO = 750 mA, TJ = 25°C 260 IO = 750 mA, TJ = –40°C to 125°C 427 IO = 750 mA, TJ = 25°C 260 IO = 750 mA, TJ = –40°C to 125°C 427

= 2.7 V, V

imin

Line Reg. (mV)

= 10 V:

imax

+ǒ%ńVǓ

imax

100

2.7 V

MIN TYP MAX UNIT

–1 1

1000

If VO ≥ 2.5 V then V

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).

= VO + 1 V, V

imin

Line Reg. (mV)

= 10 V:

imax

+ǒ%ńVǓ

imax

*ǒVO)

100

1000

Table of Graphs

FIGURE

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

Line transient response 14, 16 Load transient response 15, 17 Output voltage vs Time 18 Equivalent series resistance (ESR) vs Output current 20 – 23

vs Output current 2, 3, 4 vs Free-air temperature 5, 6, 7

vs Input voltage 12 vs Free-air temperature 13

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

3.2835

3.2830

3.2825

3.2820

3.2815

– Output Voltage – V

3.2810

3.2805

3.2800

0.125 0.375

IO – Output Current – A

TPS77x33

OUTPUT VOLTAGE

OUTPUT CURRENT

0.25

0.5 0.675 0.75

Figure 2

VI = 4.3 V TA = 25°C

1.4985

1.4980

1.4975

1.4970

1.4965

– Output Voltage – V

1.4960

1.4955

1.4950

TPS77x15

OUTPUT VOLTAGE

OUTPUT CURRENT

VI = 2.7 V TA = 25°C

0.125 0.3750.250 0.5 0.675 0.75 IO – Output Current – A

Figure 3

2.4960

2.4955

2.4950

2.4945

2.4940

2.4935

– Output Voltage – V

2.4930

2.4925

2.4920

TPS77x25

OUTPUT VOLTAGE

OUTPUT CURRENT

VI = 3.5 V TA = 25°C

0.125 0.3750.250 0.5 0.675 0.75 IO – Output Current – A

Figure 4

TPS77x33

OUTPUT VOLTAGE

FREE-AIR TEMPERATURE

3.32 VI = 4.3 V

3.31

3.30

3.29

IO = 750 mA

3.28

– Output Voltage – V

3.27

3.26

3.25

–40 0

–60 120

–20 100 140

TA – Free-Air Temperature – °C

IO = 1 mA

20 40 60 80

Figure 5

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

1.515

1.510

1.505

1.500

1.495

– Output Voltage – V

1.490

1.485

TPS77x15

OUTPUT VOLTAGE

FREE-AIR TEMPERATURE

VI = 2.7 V

IO = 750 mA

IO = 1 mA

–40 0

–20 100–60 120

TA – Free-Air Temperature – °C

20 40 60 80

Figure 6

140

2.515

2.510

2.505

2.500

2.495

– Output Voltage – V

2.490

2.485

2.480

TPS77x25

OUTPUT VOLTAGE

FREE-AIR TEMPERATURE

VI = 3.5 V

IO = 750 mA

IO = 1 mA

–40 0–20 100–60 12020 40 60 80

TA – Free-Air Temperature – °C

Figure 7

TPS77xxx

GROUND CURRENT

POWER SUPPLY RIPPLE REJECTION

FREE-AIR TEMPERATURE

100

Ground Current – Aµ

IO = 1 mA

–40 0–20 100–60 12020 40 60 80 140

TA – Free-Air Temperature – °C

IO = 500 mA

IO = 750 mA

90 80

60 50 40

PSRR – Power Supply Ripple Rejection – dB

–10

Figure 8

TPS77x33

FREQUENCY

1k10010

f – Frequency – Hz

Figure 9

VI = 4.3 V CO = 10 µF TA = 25°C

100k10k

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 SPECTRAL NOISE DENSITY

FREQUENCY

–5

V HzOutput Spectral Noise Density – µ

–6

–7

–8

IO = 750 mA

f – Frequency – Hz

IO = 7 mA

VI = 4.3 V CO = 10 µF TA = 25°C

Ω

– Output Impedance –Z

–1

–2

IO = 1 mA

Figure 10

TPS77x33

OUTPUT IMPEDANCE

FREQUENCY

IO = 750 mA

f – Frequency – kHz

Figure 11

600

500

400

300

200

– Dropout Voltage – mV

100

TPS77x01

DROPOUT VOLTAGE

INPUT VOLTAGE

IO = 750 mA

TA = 125°C

TA = 25°C

TA = –40°C

3.52.5

VI – Input Voltage – V

4.5 5

Figure 12

TPS77x33

DROPOUT VOLTAGE

FREE-AIR TEMPERATURE

– Dropout Voltage – mV

–1

CO = 10 µF

–2

–40 0 20 120

–60 40 60 80 100

–20 140

TA – Free-Air Temperature – °C

IO = 750 mA

IO = 10 mA

IO = 0

Figure 13

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

TPS77x15

LINE TRANSIENT RESPONSE

3.7

2.7

– Input Voltage – V

– Change in

–10

∆

Output Voltage – mV

CL = 10 µF TA = 25°C

0604020 80 100 140120 160 180 200

t – Time – µs

Figure 14

TPS77x33

LINE TRANSIENT RESPONSE

LOAD TRANSIENT RESPONSE

CO = 2x47 µF ESR = 1/2x100 mΩ

VO = 1.5 V VI = 2.7 V

– Change in∆

–50

Output Voltage – mV

1000

500

I – Output Current – mA

LOAD TRANSIENT RESPONSE

TPS77x15

604020 80 100 140120 160 180 200

t – Time – µs

Figure 15

TPS77x33

5.3

– Input Voltage – V

4.3

– Change in

–10

∆

Output Voltage – mV

CL = 10 µF TA = 25°C

604020 80 100 140120 160 180 200

t – Time – µs

Figure 16

CO = 2x47 µF ESR = 1/2x100 mΩ

VO = 3.3 V VI = 4.3 V

– Change in∆

–50

Output Voltage – mV

1000

500

I – Output Current – mA

604020 80 100 140120 160 180 200

t – Time – µs

Figure 17

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FAST-TRANSIENT-RESPONSE 750-mA LOW-DROPOUT VOLTAGE REGULATORS

SLVS230A – SEPTEMBER 1999 – REVISED SEPTEMBER 1999

TYPICAL CHARACTERISTICS

TPS77x33

OUTPUT VOLTAGE

TIME (AT STARTUP)

– Output Voltage – V

Enable Pulse – V

604020 80 100 140120 160 180 2000

t – Time – µs

Figure 18

ESR

To Load

OUT

GND

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

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SLVS230A – SEPTEMBER 1999 – REVISED SEPTEMBER 1999

TYPICAL CHARACTERISTICS

TYPICAL REGION OF STABILITY

EQUIVALENT SERIES RESISTANCE

OUTPUT CURRENT

Region of Instability

Region of Stability

ESR – Equivalent series restance – Ω

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

0.1 0 125 250 375 500 625

IO – Output Current – mA

Figure 20

†

TYPICAL REGION OF STABILITY

EQUIVALENT SERIES RESISTANCE

†

OUTPUT CURRENT

Ω

Region of Instability

Region of Stability

ESR – Equivalent Series Resistance –

750

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

0.1 0 125 250 375 500 625 750

IO – Output Current – mA

Figure 21

TYPICAL REGION OF STABILITY

EQUIVALENT SERIES RESISTANCE

†

OUTPUT CURRENT

Region of Instability

Region of Stability

ESR – Equivalent series restance – Ω

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

0.1 0 125 250 375 500 625 750

IO – Output Current – mA

ESR – Equivalent series restance – Ω

0.1 0 125 250 375 500 625 750

Figure 22

†

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.

TYPICAL REGION OF STABILITY

EQUIVALENT SERIES RESISTANCE

OUTPUT CURRENT

Region of Instability

Region of Stability

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

IO – Output Current – mA

Figure 23

†

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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 regulated output voltage is typically reestablished in 120 µs.

should be tied to ground. Response to an enable transition is quick;

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.

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SLVS230A – SEPTEMBER 1999 – REVISED SEPTEMBER 1999

APPLICATION INFORMATION

external capacitor requirements (continued)

0.1 µF

RESET/

GND

OUT OUT

14 13

10 µF

RESET

250 kΩ

/PG

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+

ǒ1

ref

Where

= 1.1834 V typ (the internal reference voltage)

ref

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:

)

(1)

≥ 1.7 V

0.1 µF

≤ 0.9 V

TPS77x01

RESET

FB / NC

GND

OUT

Reset or PG Output

250 kΩ

OUTPUT

VOLTAGE

4.75 V

ref

Figure 25. TPS77x01 Adjustable LDO Regulator Programming

OUTPUT VOLTAGE

PROGRAMMING GUIDE

R1 R2

2.5 V

3.3 V

3.6 V

121 196 226 332

110 110 110 110

(2)

UNIT

kΩ kΩ kΩ kΩ

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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 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.

can be used to drive power-on reset circuitry or as

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.

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

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

D(max)

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

D(max)

Where

max is the maximum allowable junction temperature

is the thermal resistance junction-to-ambient for the package, i.e., 176°C/W for the 8-terminal

θJA

SOIC and 32.6°C/W for the 20-terminal PWP with no airflow.

is the ambient temperature.

The regulator dissipation is calculated using:

PD+

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

VI*

TJmax*T

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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

0.069 (1,75) MAX

0.050 (1,27)

0.020 (0,51)

0.014 (0,35)

0.010 (0,25)

0.004 (0,10)

0.010 (0,25)

0.157 (4,00)

0.150 (3,81)

0.244 (6,20)

0.228 (5,80)

Seating Plane

0.004 (0,10)

PINS **

DIM

A MAX

A MIN

0.008 (0,20) NOM

Gage Plane

0°–8°

0.197

(5,00)

0.189

(4,80)

0.344

(8,75)

0.337

(8,55)

0.010 (0,25)

0.044 (1,12)

0.016 (0,40)

4040047/B 03/95

0.394

(10,00)

0.386

(9,80)

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

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SLVS230A – SEPTEMBER 1999 – REVISED SEPTEMBER 1999

MECHANICAL DATA

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

20-PIN SHOWN

0,65

1,20 MAX

0,30 0,19

4,50 4,30

0,15 0,05

PINS **

DIM

0,10

6,60 6,20

Seating Plane

0,10

1614

Thermal Pad (See Note D)

0,15 NOM

0°–8°

Gage Plane

0,25

0,75 0,50

2824

A MAX

A MIN

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.

5,10

4,90

5,10

4,90

6,60

6,40

7,90

7,70

9,80

9,60

4073225/E 03/97

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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.

CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOL VE 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 APPLICA TIONS. INCLUSION OF TI PRODUCTS IN SUCH APPLICATIONS IS UNDERST OOD TO 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.

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TEXAS INSTRUMENTS TMS77701 Technical data

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