background image

TPS76301, TPS76316, TPS76318, TPS76325, TPS76327

TPS76328, TPS76330, TPS76333, TPS76338, TPS76350

LOW-POWER 150-mA LOW-DROPOUT LINEAR REGULATORS

SLVS181E – DECEMBER 1998 – REVISED APRIL 2000

1

POST OFFICE BOX 655303 

 DALLAS, TEXAS 75265

D

150-mA Low-Dropout Regulator

D

Output Voltage: 5 V, 3.8 V, 3.3 V, 3.0 V, 2.8 V,

2.7 V, 2.5 V, 1.8 V, 1.6 V and Variable

D

Dropout Voltage, Typically 300 mV

at 150 mA

D

Thermal Protection

D

Over Current Limitation

D

Less Than 2-

µ

A Quiescent Current in

Shutdown Mode

D

–40

°

C to 125

°

C Operating Junction

Temperature Range

D

5-Pin SOT-23 (DBV) Package

     

description

The TPS763xx family of low-dropout (LDO) voltage regulators offers the benefits of low-dropout voltage,

low-power operation, and miniaturized packaging. These regulators feature low dropout voltages and quiescent

currents compared to conventional LDO regulators. Offered in 5-terminal small outline integrated-circuit

SOT-23 package, the TPS763xx series devices are ideal for cost-sensitive designs and where board space is

at a premium.

A combination of new circuit design and process innovation has enabled the usual pnp pass transistor to be

replaced by a PMOS pass element. Because the PMOS pass element behaves as a low-value resistor, the

dropout voltage is very low—typically 300 mV at 150 mA of load current (TPS76333)—and is directly

proportional to the load current. Since the PMOS pass element is a voltage-driven device, the quiescent current

is very low (140 

µ

A maximum) and is stable over the entire range of output load current (0 mA to 150 mA).

Intended for use in portable systems such as laptops and cellular phones, the low-dropout voltage feature and

low-power operation result in a significant increase in system battery operating life.

The TPS763xx also features a logic-enabled sleep mode to shut down the regulator, reducing quiescent current

to 1 

µ

A maximum at T

J

 = 25

°

C.The TPS763xx is offered in 1.6-V,1.8-V, 2.5-V, 2.7-V, 2.8-V, 3.0-V, 3.3-V, 3.8-V,

and 5-V fixed-voltage versions and in a variable version (programmable over the range of 1.5 V to 6.5 V.

AVAILABLE OPTIONS

TJ

VOLTAGE

PACKAGE

PART NUMBER

SYMBOL

Variable

TPS76301DBVT†

TPS76301DBVR‡

PAZI

1.6 V

TPS76316DBVT†

TPS76316DBVR‡

PBHI

1.8 V

TPS76318DBVT†

TPS76318DBVR‡

PBAI

2.5 V

TPS76325DBVT†

TPS76325DBVR‡

PBBI

40

°

C to 125

°

C

2.7 V

SOT-23

TPS76327DBVT†

TPS76327DBVR‡

PBCI

–40

°

C to 125

°

C

2.8 V

(DBV)

TPS76328DBVT†

TPS76328DBVR‡

PBDI

3.0 V

TPS76330DBVT†

TPS76330DBVR‡

PBII

3.3 V

TPS76333DBVT†

TPS76333DBVR‡

PBEI

3.8 V

TPS76338DBVT†

TPS76338DBVR‡

PBFI

5.0 V

TPS76350DBVT†

TPS76350DBVR‡

PBGI

† The DBVT passive indicates tape and reel of 250 parts.

‡ The DBVR passive indicates tape and reel of 3000 parts.

Copyright 

©

 2000, 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.

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.

3

2

4

5

DBV PACKAGE

(TOP VIEW)

1

IN

GND

EN

OUT

NC/FB

background image

TPS76301, TPS76316, TPS76318, TPS76325, TPS76327

TPS76328, TPS76330, TPS76333, TPS76338, TPS76350

LOW-POWER 150-mA LOW-DROPOUT LINEAR REGULATORS

SLVS181E – DECEMBER 1998 – REVISED APRIL 2000

2

POST OFFICE BOX 655303 

 DALLAS, TEXAS 75265

functional block diagram

TPS76301

OUT

IN

FB

GND

EN

VREF

TPS76316/ 18/ 25/ 27/ 28/ 30/ 33/ 38/ 50

OUT

IN

GND

EN

VREF

Current Limit

/ Thermal

Protection

Current Limit

/ Thermal

Protection

Terminal Functions

TERMINAL

I/O

DESCRIPTION

NAME

I/O

DESCRIPTION

GND

Ground

EN

I

Enable input

FB

I

Feedback voltage (TPS76301 only)

IN

I

Input supply voltage

NC

No connection (fixed-voltage option only)

OUT

O

Regulated output voltage

background image

TPS76301, TPS76316, TPS76318, TPS76325, TPS76327

TPS76328, TPS76330, TPS76333, TPS76338, TPS76350

LOW-POWER 150-mA LOW-DROPOUT LINEAR REGULATORS

SLVS181E – DECEMBER 1998 – REVISED APRIL 2000

3

POST OFFICE BOX 655303 

 DALLAS, TEXAS 75265

absolute maximum ratings over operating free-air temperature range (unless otherwise noted)

Ĕ

Input voltage range

(see Note 1)

 

– 0.3 V to 10 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Voltage range at EN 

–0.3 V to V

I

 + 0.3 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Voltage on OUT, FB

7 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Peak output current 

Internally limited

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

ESD rating, HBM 

2 kV

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Continuous total power dissipation 

See Dissipation Rating Tables

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Operating virtual junction temperature range, T

J

  – 40

°

C to 150

°

C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Storage temperature range, T

stg

  – 65

°

C to 150

°

C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and

functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not

implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

NOTE 1: All voltage values are with respect to network ground terminal.

DISSIPATION RATING TABLE

PACKAGE

TA 

 25

°

C

POWER RATING

DERATING FACTOR

ABOVE TA = 25

°

C

TA = 70

°

C

POWER RATING

TA = 85

°

C

POWER RATING

Recommended

DBV

350 mW

3.5 mW/

°

C

192 mW

140 mW

Maximum

DBV

437 mW

3.5 mW/

°

C

280 mW

227 mW

recommended operating conditions

MIN

NOM

MAX

UNIT

Input voltage, VI†

2.7

10

V

Continuous output current, IO

0

150

mA

Operating junction temperature, TJ

–40

125

°

C

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

        VI(min) = VO(max) + VDO(max load)

background image

TPS76301, TPS76316, TPS76318, TPS76325, TPS76327

TPS76328, TPS76330, TPS76333, TPS76338, TPS76350

LOW-POWER 150-mA LOW-DROPOUT LINEAR REGULATORS

SLVS181E – DECEMBER 1998 – REVISED APRIL 2000

4

POST OFFICE BOX 655303 

 DALLAS, TEXAS 75265

electrical characteristics over recommended operating free-air temperature range, 

V

I

 = V

O(typ)

 + 1 V, I

= 1 mA, EN = IN, C

O

 = 4.7 

µ

F (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

3.25 V > VI 

 2.7 V,

2.5 V 

 VO 

 1.5 V,

IO = 1 mA to 75 mA,

TJ = 25

°

C

0.98 VO

VO

1.02 VO

3.25 V > VI 

 2.7 V,

2.5 V 

 VO 

 1.5 V

IO = 1 mA to 75 mA,

0.97 VO

VO

1.03 VO

TPS76301

VI 

 3.25 V,

5 V 

 VO 

 1.5 V

IO = 1 mA to 100 mA,

TJ = 25

°

C

0.98 VO

VO

1.02 VO

V

TPS76301

VI 

 3.25 V,

5 V 

 VO 

 1.5 V

IO = 1 mA to 100 mA,

0.97 VO

VO

1.03 VO

V

VI 

 3.25 V,

5 V 

 VO 

 1.5 V

IO = 1 mA to 150 mA,

TJ = 25

°

C

0.975 VO

VO

1.025 VO

VI 

 3.25 V,

5 V 

 VO 

 1.5 V

IO = 1 mA to 150 mA,

0.9625 VO

VO 1.0375VO

VI = 2.7 V,

1 mA< IO < 75 mA,

TJ = 25

°

C

1.568

1.6

1.632

VI = 2.7 V,

1 mA< IO < 75 mA

1.552

1.6

1.648

TPS76316

VI = 3.25 V,

1 mA < IO < 100 mA,

TJ = 25

°

C

1.568

1.6

1.632

V

VI = 3.25 V,

1 mA < IO < 100 mA

1.552

1.6

1.648

VI = 3.25 V,

1 mA < IO < 150 mA,

TJ = 25

°

C

1.560

1.6

1.640

VI = 3.25 V,

1 mA < IO < 150 mA

1.536

1.6

1.664

VI = 2.7 V,

1 mA< IO < 75 mA,

TJ = 25

°

C

1.764

1.8

1.836

V

O t

t

lt

VI = 2.7 V,

1 mA< IO < 75 mA

1.746

1.8

1.854

VO

Output voltage

TPS76318

VI = 3.25 V,

1 mA < IO < 100 mA,

TJ = 25

°

C

1.764

1.8

1.836

V

VI = 3.25 V,

1 mA < IO < 100 mA

1.746

1.8

1.854

VI = 3.25 V,

1 mA < IO < 150 mA,

TJ = 25

°

C

1.755

1.8

1.845

VI = 3.25 V,

1 mA < IO < 150 mA

1.733

1.8

1.867

IO = 1 mA to 100 mA,

TJ = 25

°

C

2.45

2.5

2.55

TPS76325

IO = 1 mA to 100 mA

2.425

2.5

2.575

V

TPS76325

IO = 1 mA to 150 mA,

TJ = 25

°

C

2.438

2.5

2.562

V

IO = 1 mA to 150 mA

2.407

2.5

2.593

IO = 1 mA to 100 mA,

TJ = 25

°

C

2.646

2.7

2.754

TPS76327

IO = 1 mA to 100 mA

2.619

2.7

2.781

V

TPS76327

IO = 1 mA to 150 mA,

TJ = 25

°

C

2.632

2.7

2.767

V

IO = 1 mA to 150 mA

2.599

2.7

2.801

IO = 1 mA to 100 mA,

TJ = 25

°

C

2.744

2.8

2.856

TPS76328

IO = 1 mA to 100 mA

2.716

2.8

2.884

V

TPS76328

IO = 1 mA to 150 mA,

TJ = 25

°

C

2.73

2.8

2.87

V

IO = 1 mA to 150 mA

2.695

2.8

2.905

IO = 1 mA to 100 mA,

TJ = 25

°

C

2.94

3.0

3.06

TPS76330

IO = 1 mA to 100 mA

2.91

3.0

3.09

V

TPS76330

IO = 1 mA to 150 mA,

TJ = 25

°

C

2.925

3.0

3.075

V

IO = 1 mA to 150 mA

2.888

3.0

3.112

background image

TPS76301, TPS76316, TPS76318, TPS76325, TPS76327

TPS76328, TPS76330, TPS76333, TPS76338, TPS76350

LOW-POWER 150-mA LOW-DROPOUT LINEAR REGULATORS

SLVS181E – DECEMBER 1998 – REVISED APRIL 2000

5

POST OFFICE BOX 655303 

 DALLAS, TEXAS 75265

electrical characteristics over recommended operating free-air temperature range, 

V

I

 = V

O(typ)

 + 1 V, I

= 1 mA, EN = IN, C

O

 = 4.7 

µ

F (unless otherwise noted)  (continued)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

IO = 1 mA to 100 mA,

TJ = 25

°

C

3.234

3.3

3.366

TPS76333

IO = 1 mA to 100 mA

3.201

3.3

3.399

V

TPS76333

IO = 1 mA to 150 mA,

TJ = 25

°

C

3.218

3.3

3.382

V

IO = 1 mA to 150 mA

3.177

3.3

3.423

IO = 1 mA to 100 mA,

TJ = 25

°

C

3.724

3.8

3.876

VO

Output voltage

TPS76338

IO = 1 mA to 100 mA

3.705

3.8

3.895

V

VO

Output voltage

TPS76338

IO = 1 mA to 150 mA,

TJ = 25

°

C

3.686

3.8

3.914

V

IO = 1 mA to 150 mA

3.667

3.8

3.933

IO = 1 mA to 100 mA,

TJ = 25

°

C

4.875

5

5.125

TPS76350

IO = 1 mA to 100 mA

4.825

5

5.175

V

TPS76350

IO = 1 mA to 150 mA,

TJ = 25

°

C

4.750

5

5.15

V

IO = 1 mA to 150 mA

4.80

5

5.20

I(Q)

Quiescent current

IO = 0 to 150 mA,

TJ = 25

°

C, See Note 2

85

100

I(Q)

(GND terminal current)

IO = 0 to 150 mA,

See Note 2

140

µ

A

Standby current

EN < 0.5 V,

TJ = 25

°

C

0.5

1

µ

A

Standby current

EN < 0.5 V

2

Vn

Output noise voltage

BW = 300 Hz to 50 kHz,

TJ = 25

°

C,

Co = 10 

µ

F,

See Note 2

140

µ

V

PSRR

Ripple rejection

f = 1 kHz,  Co = 10 

µ

F,

TJ = 25

°

C, See Note 2

60

dB

Current limit

TJ = 25

°

C,

See Note 3

0.8

1.5

A

Output voltage line regulation

VO + 1 V < VI 

 10 V,

VI 

 3.5 V,   TJ = 25

°

C

0.04

0.07

%/V

g

g

(

VO/VO)   (see Note 4)

VO + 1 V < VI 

 10 V,

VI 

 3.5 V

0.1

%/V

VIH

EN high level input

See Note 2

1.4

2

V

VIL

EN low level input

See Note 2

0.5

1.2

V

II

EN input current

EN = 0 V

–0.01

–0.5

µ

A

II

EN input current

EN = IN

–0.01

–0.5

µ

A

NOTES:

2. Minimum IN operating voltage is 2.7 V or VO(typ) + 1 V, whichever is greater.

3. Test condition includes, output voltage VO=0 volts (for variable device FB is shorted to VO), and pulse duration = 10 mS.

4. If VO < 2.5 V and Vimax = 10 V, Vimin = 3.5 V:

Line Reg. (mV)

+ ǒ

%

ń

V

Ǔ  

V

O

ǒ

V

imax

*

3.5 V

Ǔ

100

 

1000

If VO > 2.5 V and Vimax = 10 V, Vimin = VO + 1 V:

Line Reg. (mV)

+ ǒ

%

ń

V

Ǔ  

V

O

ǒ

V

imax

*

ǒ

V

O

)

1

Ǔ

Ǔ

100

 

1000

background image

TPS76301, TPS76316, TPS76318, TPS76325, TPS76327

TPS76328, TPS76330, TPS76333, TPS76338, TPS76350

LOW-POWER 150-mA LOW-DROPOUT LINEAR REGULATORS

SLVS181E – DECEMBER 1998 – REVISED APRIL 2000

6

POST OFFICE BOX 655303 

 DALLAS, TEXAS 75265

electrical characteristics over recommended operating free-air temperature range, 

V

I

 = V

O(typ)

 + 1 V, I

= 1 mA, EN = IN, C

O

 = 4.7 

µ

F (unless otherwise noted) (continued)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

IO = 0 mA,

TJ = 25

°

C

0.2

IO = 1 mA,

TJ = 25

°

C

3

IO = 50 mA,

TJ = 25

°

C

120

150

IO = 50 mA

200

TPS76325

IO = 75 mA,

TJ = 25

°

C

180

225

mV

TPS76325

IO = 75 mA

300

mV

IO = 100 mA,

TJ = 25

°

C

240

300

IO = 100 mA

400

IO = 150 mA,

TJ = 25

°

C

360

450

IO = 150 mA

600

IO = 0 mA,

TJ = 25

°

C

0.2

IO = 1 mA,

TJ = 25

°

C

3

IO = 50 mA,

TJ = 25

°

C

100

125

IO = 50 mA

166

VDO

Dropout voltage

TPS76333

IO = 75 mA,

TJ = 25

°

C

150

188

mV

VDO

Dropout voltage

TPS76333

IO = 75 mA

250

mV

IO = 100 mA,

TJ = 25

°

C

200

250

IO = 100 mA

333

IO = 150 mA,

TJ = 25

°

C

300

375

IO = 150 mA

500

IO = 0 mA,

TJ = 25

°

C

0.2

IO = 1 mA,

TJ = 25

°

C

2

IO = 50 mA,

TJ = 25

°

C

60

75

IO = 50 mA

100

TPS76350

IO = 75 mA,

TJ = 25

°

C

90

113

mV

TPS76350

IO = 75 mA

150

mV

IO = 100 mA,

TJ = 25

°

C

120

150

IO = 100 mA

200

IO = 150 mA,

TJ = 25

°

C

180

225

IO = 150 mA

300

background image

TPS76301, TPS76316, TPS76318, TPS76325, TPS76327

TPS76328, TPS76330, TPS76333, TPS76338, TPS76350

LOW-POWER 150-mA LOW-DROPOUT LINEAR REGULATORS

SLVS181E – DECEMBER 1998 – REVISED APRIL 2000

7

POST OFFICE BOX 655303 

 DALLAS, TEXAS 75265

TYPICAL CHARACTERISTICS

Figure 1

IO – Output Current – mA

TPS76325

OUTPUT VOLTAGE

vs

OUTPUT CURRENT

2.5

2.485

2.475

30

90

2.495

2.49

2.48

60

120

180

2.505

0

150

VI = 3.5 V

CI = CO = 4.7 

µ

F

TA = 25

°

C

Pulse Tested

– Output V

oltage – V

V

O

Figure 2

IO – Output Current – mA

1.795

1.780

1.770

30

90

1.790

1.785

1.775

60

120

180

1.805

0

150

– Output V

oltage – V

V

O

TPS76318

OUTPUT VOLTAGE

vs

OUTPUT CURRENT

1.800

VI = 3.5 V

CI = CO = 4.7 

µ

F

TA = 25

°

C

Pulse Tested

Figure 3

IO – Output Current – mA

TPS76350

OUTPUT VOLTAGE

vs

OUTPUT CURRENT

5

4.97

4.95

30

90

4.99

4.98

4.96

60

120

180

5.01

0

150

– Output V

oltage – V

V

O

VI = 6 V

CI = CO = 4.7 

µ

F

TA = 25

°

C

Pulse Tested

Figure 4

TA – Free-Air Temperature – 

°

C

TPS76325

OUTPUT VOLTAGE

vs

FREE-AIR TEMPERATURE

2.49

2.47

–35

5

2.5

2.48

–15

25

125

2.53

–55

45

65

2.51

2.52

85

105

IO = 150 mA

IO = 1 mA

– Output V

oltage – V

V

O

VI = 3.5 V

CI = CO = 4.7 

µ

F

background image

TPS76301, TPS76316, TPS76318, TPS76325, TPS76327

TPS76328, TPS76330, TPS76333, TPS76338, TPS76350

LOW-POWER 150-mA LOW-DROPOUT LINEAR REGULATORS

SLVS181E – DECEMBER 1998 – REVISED APRIL 2000

8

POST OFFICE BOX 655303 

 DALLAS, TEXAS 75265

TYPICAL CHARACTERISTICS

Figure 5

TA – Free-Air Temperature – 

°

C

TPS76318

OUTPUT VOLTAGE

vs

FREE-AIR TEMPERATURE

1.74

–35

5

1.8

1.78

–15

25

125

1.82

–55

45

65

85

105

IO = 150 mA

IO = 1 mA

– Output V

oltage – V

V

O

1.75

1.79

1.76

1.81

1.77

VI = 3.5 V

CI = CO = 4.7 

µ

F

Figure 6

TA – Free-Air Temperature – 

°

C

TPS76350

OUTPUT VOLTAGE

vs

FREE-AIR TEMPERATURE

5.02

4.98

4.94

4.9

–35

5

5.04

5

4.96

4.92

–15

25

125

5.1

–55

45

65

5.06

5.08

85

105

IO = 150 mA

IO = 1 mA

– Output V

oltage – V

V

O

VI = 6 V

CI = CO = 4.7 

µ

F

Figure 7

TA – Free-Air Temperature – 

°

C

100

10

–35

5

–15

25

125

–55

45

65

1000

85

105

TPS76350

GROUND CURRENT

vs

FREE-AIR TEMPERATURE

Ground Current – 

A

µ

VI = 6 V

CI = CO = 4.7 

µ

F

IO = 0 mA and 150 mA

Figure 8

f – Frequency – Hz

1k

10k

100k

250

Output Noise

OUTPUT NOISE 

vs

 FREQUENCY

2

µ

V Hz

Ǹ

2.5

µ

V Hz

Ǹ

3

µ

V Hz

Ǹ

1

µ

V Hz

Ǹ

1.5

µ

V Hz

Ǹ

0

µ

V Hz

Ǹ

0.5

µ

V Hz

Ǹ

CO = 4.7 

µ

F

IO = 1 mA

CO = 4.7 

µ

F

IO = 150 mA

CO = 10 

µ

F

IO = 150 mA

CO = 10 

µ

F

IO = 1 mA

TA = 25

°

C

background image

TPS76301, TPS76316, TPS76318, TPS76325, TPS76327

TPS76328, TPS76330, TPS76333, TPS76338, TPS76350

LOW-POWER 150-mA LOW-DROPOUT LINEAR REGULATORS

SLVS181E – DECEMBER 1998 – REVISED APRIL 2000

9

POST OFFICE BOX 655303 

 DALLAS, TEXAS 75265

TYPICAL CHARACTERISTICS

Figure 9

0.1

0.1

1

1000

10

0.01

10

1

f – Frequency – kHz

100

– Output Impedance –

Z

o

OUTPUT IMPEDANCE

vs

FREQUENCY

CI = CO = 4.7 

µ

F

ESR = 1 

TA = 25

°

C

IO = 150 mA

IO = 1 mA

Figure 10

TA – Free-Air Temperature – 

°

C

200

0

–35

5

300

100

–15

25

125

600

–55

45

65

400

500

VI = EN = 2.7 V

CI = CO = 4.7 

µ

F

85

105

1 mA

– Dropout V

oltage – mV

V

DO

150 mA

0 mA

TPS76325

DROPOUT VOLTAGE

vs

FREE-AIR TEMPERATURE

Figure 11

10 M

1 M

100 k

10 k

1 k

100

Ripple Rejection – dB

f – Frequency – Hz

RIPPLE REJECTION

vs

FREQUENCY

70

60

50

40

30

20

10

0

– 10

10

TPS76325

CO = 4.7 

µ

F

ESR = 1 

TA = 25

°

C

IO = 150 mA

IO = 1 mA

background image

TPS76301, TPS76316, TPS76318, TPS76325, TPS76327

TPS76328, TPS76330, TPS76333, TPS76338, TPS76350

LOW-POWER 150-mA LOW-DROPOUT LINEAR REGULATORS

SLVS181E – DECEMBER 1998 – REVISED APRIL 2000

10

POST OFFICE BOX 655303 

 DALLAS, TEXAS 75265

TYPICAL CHARACTERISTICS

Figure 12

V

O

– Change in

4

2

3

1

0

–20

20

TPS76318

LINE TRANSIENT RESPONSE

V

I

t – Time – 

µ

s

0

60

40

20

80

100

140

120

160

180 200

– Input V

oltage – V

Output 

V

oltage – mV

–30

CO = 4.7 

µ

F

ESR = 0.25 

TA = 25

°

C

dv

dt

+

1 V

10

µ

s

5

Figure 13

50

–50

0

–100

100

0

200

t – Time – 

µ

s

CO = 4.7 

µ

F

ESR = 0.25 

 

TA = 25

°

C

TPS76318

LOAD TRANSIENT RESPONSE

0

60

40

20

80

100

140

120

160

180 200

I    – Output Current – mA O

V

O

– Change in

Output 

V

oltage – mV

–150

Figure 14

5

–50

0

–100

7

6

8

TPS76350

LINE TRANSIENT RESPONSE

t – Time – 

µ

s

0

150

100

50

200

250

350

300

400

450 500

V

O

– Change in

V

I

– Input V

oltage – V

Output 

V

oltage – mV

50

dv

dt

+

1 V

10

µ

s

CO = 4.7 

µ

F

ESR = 0.25 

TA = 25

°

C

Figure 15

150

–100

100

200

0

100

0

t – Time – 

µ

s

CO = 4.7 

µ

F

ESR = 0.25 

TA = 25

°

C

TPS76350

LOAD TRANSIENT RESPONSE

0

60

40

20

80

100

140

120

160

180 200

I    – Output Current – mA O

V

O

– Change in

Output 

V

oltage – mV

–200

background image

TPS76301, TPS76316, TPS76318, TPS76325, TPS76327

TPS76328, TPS76330, TPS76333, TPS76338, TPS76350

LOW-POWER 150-mA LOW-DROPOUT LINEAR REGULATORS

SLVS181E – DECEMBER 1998 – REVISED APRIL 2000

11

POST OFFICE BOX 655303 

 DALLAS, TEXAS 75265

TYPICAL CHARACTERISTICS

Figure 16

0.1

0.01

0

50

100

150

200

250

TYPICAL REGIONS OF STABILITY

COMPENSATION SERIES RESISTANCE (CSR)

vs

OUTPUT CURRENT

10

100

IO – Output Current – mA

CSR – Compensation Series Resistance – 

1

Region of Instability

CO = 4.7 

µ

F

TA = 25

°

C

Region of Instability

Figure 17

0.1

0.01

0

0.1

0.2

0.3

0.4

0.5

TYPICAL REGIONS OF STABILITY

COMPENSATION SERIES RESISTANCE (CSR)

vs

ADDED CERAMIC CAPACITANCE

10

100

Added Ceramic Capacitance – 

µ

F

0.6

0.7 0.8

0.9

1

1

Region of Instability

Region of Instability

CSR – Compensation Series Resistance – 

I = 150 mA

CO = 4.7 

µ

F

TA = 25

°

C

Figure 18

0.1

0.01

0

50

100

150

200

250

TYPICAL REGIONS OF STABILITY

COMPENSATION SERIES RESISTANCE (CSR)

vs

OUTPUT CURRENT

10

100

IO – Output Current – mA

1

Region of Instability

CSR – Compensation Series Resistance – 

Region of Instability

CO = 10 

µ

F

Figure 19

0.1

0.01

0

0.1

0.2

0.3

0.4

0.5

TYPICAL REGIONS OF STABILITY

COMPENSATION SERIES RESISTANCE (CSR)

vs

ADDED CERAMIC CAPACITANCE

10

100

Added Ceramic Capacitance – 

µ

F

1

0.6

0.7 0.8

0.9

1

CSR – Compensation Series Resistance – 

CO = 10 

µ

F

Region of Instability

Region of Instability

† CSR refers to the total series resistance, including the ESR of the capacitor, any series resistance added externally, and PWB trace resistance

to CO.

background image

TPS76301, TPS76316, TPS76318, TPS76325, TPS76327

TPS76328, TPS76330, TPS76333, TPS76338, TPS76350

LOW-POWER 150-mA LOW-DROPOUT LINEAR REGULATORS

SLVS181E – DECEMBER 1998 – REVISED APRIL 2000

12

POST OFFICE BOX 655303 

 DALLAS, TEXAS 75265

APPLICATION INFORMATION

The TPS763xx low-dropout (LDO) regulators are new families of regulators which have been optimized for use

in battery-operated equipment and feature extremely low dropout voltages, low quiescent current (140 

µ

A), and

an enable input to reduce supply currents to less than 2 

µ

A when the regulator is turned off.

device operation

The TPS763xx uses a PMOS pass element to dramatically reduce both dropout voltage and supply current over

more conventional PNP-pass-element LDO designs. The PMOS pass element is a voltage-controlled device

that, unlike a PNP transistor, does not require increased drive current as output current increases. Supply

current in the TPS763xx is essentially constant from no-load to maximum load.

Current limiting and thermal protection prevent damage by excessive output current and/or power dissipation.

The device switches into a constant-current mode at approximately 1 A; further load reduces the output voltage

instead of increasing the output current. The thermal protection shuts the regulator off if the junction temperature

rises above 165

°

C. Recovery is automatic when the junction temperature drops approximately 25

°

C below the

high temperature trip point. The PMOS pass element includes a back diode that safely conducts reverse current

when the input voltage level drops below the output voltage level.

A logic low on the enable input, EN shuts off the output and reduces the supply current to less than 2 

µ

A. EN

should be tied high in applications where the shutdown feature is not used.

A typical application circuit is shown in Figure 20.

C1

µ

F

† TPS76316, TPS76318, TPS76325, TPS76327, TPS76328, TPS7630

TPS76333, TPS76338, TPS76350 (fixed-voltage options).

NC/FB

OUT

1

3

IN

EN

GND

2

4

5

VI

CSR = 1 

VO

4.7 

µ

F

+

TPS763xx†

Figure 20. Typical Application Circuit

background image

TPS76301, TPS76316, TPS76318, TPS76325, TPS76327

TPS76328, TPS76330, TPS76333, TPS76338, TPS76350

LOW-POWER 150-mA LOW-DROPOUT LINEAR REGULATORS

SLVS181E – DECEMBER 1998 – REVISED APRIL 2000

13

POST OFFICE BOX 655303 

 DALLAS, TEXAS 75265

APPLICATION INFORMATION

external capacitor requirements

Although not required, a 0.047-

µ

F or larger ceramic bypass input capacitor, connected between IN and GND

and located close to the TPS763xx, is recommended to improve transient response and noise rejection. A

higher-value electrolytic input capacitor may be necessary if large, fast-rise-time load transients are anticipated

and the device is located several inches from the power source.

Like all low dropout regulators, the TPS763xx requires an output capacitor connected between OUT and GND

to stabilize the internal loop control. The minimum recommended capacitance value is 4.7 

µ

F and the ESR

(equivalent series resistance) must be between 0.2 

 and 10 

. Capacitor values 4.7 

µ

F or larger are

acceptable, provided the ESR is less than 10 

. Solid tantalum electrolytic, aluminum electrolytic, and multilayer

ceramic capacitors are all suitable, provided they meet the requirements described above. Most of the

commercially available 4.7 

µ

F surface-mount solid tantalum capacitors, including devices from Sprague,

Kemet, and Nichico, meet the ESR requirements stated above. Multilayer ceramic capacitors should have

minimum values of 1 

µ

F over the full operating temperature range of the equipment.

CAPACITOR SELECTION

PART NO.

MFR.

VALUE

MAX ESR

SIZE (H 

×

 L 

× 

W)

T494B475K016AS

KEMET

4.7 

µ

F

1.5 

1.9 

×

 3.5 

×

 2.8

195D106x0016x2T

SPRAGUE

10 

µ

F

1.5 

1.3 

×

 7.0 

×

 2.7

695D106x003562T

SPRAGUE

10 

µ

F

1.3 

2.5 

×

 7.6 

×

 2.5

TPSC475K035R0600

AVX

4.7 

µ

F

0.6 

2.6 

×

 6.0 

×

 3.2

† Size is in mm. ESR is maximum resistance in ohms at 100 kHz and TA = 25

°

C. Listings are sorted by height.

output voltage programming

The output voltage of the TPS76301 adjustable regulator is programmed using an external resistor divider as

shown in Figure 21. The output voltage is calculated using:

V

O

+

0.995

 

V

ref

 

ǒ

1

)

R1

R2

Ǔ

(1)

Where:

V

ref

 = 1.192 V typ (the internal reference voltage)

0.995 is a constant used to center the load regulator (1%)

Resistors R1 and R2 should be chosen for approximately 7-

µ

A divider current. Lower value resistors can be

used but offer no inherent advantage and waste more power. Higher values should be avoided as leakage

currents at FB increase the output voltage error. The recommended design procedure is to choose

R2 = 169 k

 to set the divider current at 7 

µ

A and then calculate R1 using:

R1

+

ǒ

V

O

0.995

 

V

ref

*

1

Ǔ

 

R2

(2)

background image

TPS76301, TPS76316, TPS76318, TPS76325, TPS76327

TPS76328, TPS76330, TPS76333, TPS76338, TPS76350

LOW-POWER 150-mA LOW-DROPOUT LINEAR REGULATORS

SLVS181E – DECEMBER 1998 – REVISED APRIL 2000

14

POST OFFICE BOX 655303 

 DALLAS, TEXAS 75265

APPLICATION INFORMATION

VO

VI

OUT

FB

R2

GND

EN

IN

0.5 V

2 V

TPS76301

µ

F

OUTPUT

VOLTAGE

(V)

R1

R2

2.5

3.3

3.6

4

5

6.45

187

301

348

402

549

750

169

169

169

169

169

169

OUTPUT VOLTAGE

PROGRAMMING GUIDE

DIVIDER RESISTANCE

(k

)†

† 1% values shown.

3

1

4

2

R1

5

CSR = 1 

4.7 

µ

F

+

Figure 21. TPS76301 Adjustable LDO Regulator Programming

power dissipation and junction temperature

Specified regulator operation is assured to a junction temperature of 125

°

C; the maximum junction temperature

allowable to avoid damaging the device is 150

°

C. 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, P

D(max)

, and the actual dissipation, P

D

, which must be less than or equal to

P

D(max)

.

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

P

D(max)

+

T

J

max

*

T

A

R

q

JA

Where:

T

J

max

 

is the maximum allowable junction temperature

R

θ

JA

 is the thermal resistance junction-to-ambient for the package, i.e., 285

°

C/W for the 5-terminal

SOT23.

T

is the ambient temperature.

The regulator dissipation is calculated using:

P

D

+

ǒ

V

I

*

V

O

Ǔ

 

I

O

Power dissipation resulting from quiescent current is negligible.

background image

TPS76301, TPS76316, TPS76318, TPS76325, TPS76327

TPS76328, TPS76330, TPS76333, TPS76338, TPS76350

LOW-POWER 150-mA LOW-DROPOUT LINEAR REGULATORS

SLVS181E – DECEMBER 1998 – REVISED APRIL 2000

15

POST OFFICE BOX 655303 

 DALLAS, TEXAS 75265

APPLICATION INFORMATION

regulator protection

The TPS763xx pass element has a built-in back diode that safely 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. If extended reverse voltage is anticipated, external limiting might be

appropriate.

The TPS763xx also features internal current limiting and thermal protection. During normal operation, the

TPS763xx limits output current to approximately 800 mA. When current limiting engages, the output voltage

scales back linearly until the overcurrent condition ends. While current limiting is designed to prevent gross

device failure, care should be taken not to exceed the power dissipation ratings of the package. If the

temperature of the device exceeds 165

°

C, thermal-protection circuitry shuts it down. Once the device has

cooled down to below 140

°

C, regulator operation resumes.

background image

TPS76301, TPS76316, TPS76318, TPS76325, TPS76327

TPS76328, TPS76330, TPS76333, TPS76338, TPS76350

LOW-POWER 150-mA LOW-DROPOUT LINEAR REGULATORS

SLVS181E – DECEMBER 1998 – REVISED APRIL 2000

16

POST OFFICE BOX 655303 

 DALLAS, TEXAS 75265

MECHANICAL DATA

DBV (R-PDSO-G5)   

PLASTIC SMALL-OUTLINE PACKAGE

0,25

0,35

0,55

Gage Plane

0,15 NOM

4073253-4/B 10/97

2,50

3,00

0,40

0,20

1,50

1,80

4

5

3

3,10

1

2,70

1,00

1,30

0,05 MIN

Seating Plane

0,10

0,95

M

0,25

0

°

– 8

°

NOTES: A. All linear dimensions are in millimeters.

B. This drawing is subject to change without notice.

C. Body dimensions include mold flash or protrusion.

background image

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 acknowledgment, 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.

Customers are responsible for their applications using TI components.

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.

Copyright 

©

 2000, Texas Instruments Incorporated