TPS763_技术文档

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SLVS181H − DECEMBER 1998 − REVISED JANUARY 2004

DBV PACKAGE

(TOP VIEW)

D

150-mA Low-Dropout Regulator

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

1

2

3

5

4

OUT

IN

Dropout Voltage, Typically 300 mV

at 150 mA

GND

Thermal Protection

NC/FB

EN

Over Current Limitation

Less Than 2-µA Quiescent Current in

Shutdown Mode

D

−40°C to 125°C Operating Junction

Temperature Range

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 a 5-terminal, small outline integrated-circuit SOT-23 package, the TPS763xx

series devices are ideal for cost-sensitive designs and for applications 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 µA 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 µA

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

T

VOLTAGE

Variable

1.6 V

PACKAGE

PART NUMBER

SYMBOL

PAZI

J

(1)

(2)

TPS76301DBVR

TPS76301DBVT

TPS76316DBVT

TPS76318DBVT

TPS76325DBVT

TPS76327DBVT

TPS76328DBVT

TPS76330DBVT

TPS76333DBVT

TPS76338DBVT

TPS76350DBVT

TPS76316DBVR

TPS76318DBVR

TPS76325DBVR

TPS76327DBVR

TPS76328DBVR

TPS76330DBVR

TPS76333DBVR

TPS76338DBVR

TPS76350DBVR

PBHI

PBAI

PBBI

PBCI

PBDI

PBII

1.8 V

2.5 V

2.7 V

SOT-23

(DBV)

−40°C to 125°C

2.8 V

3.0 V

3.3 V

PBEI

PBFI

PBGI

3.8 V

5.0 V

(1)

(2)

The DBVT passive indicates tape and reel of 250 parts.

The DBVR passive indicates tape and reel of 3000 parts.

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.

All trademarks are the property of their respective owners.

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Copyright  2001 − 2004 Texas Instruments Incorporated

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SLVS181H − DECEMBER 1998 − REVISED JANUARY 2004

FUNCTIONAL BLOCK DIAGRAM

TPS76301

OUT

FB

IN

EN

Current Limit/

Thermal

Protection

V

REF

GND

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

OUT

IN

EN

Current Limit/

Thermal

Protection

V

REF

GND

Terminal Functions

TERMINAL

NAME

DESCRIPTION

GND

Ground

EN

FB

Enable input

Feedback voltage (TPS76301 only)

Input supply voltage

IN

NC

OUT

No connection (fixed-voltage option only)

Regulated output voltage

2

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SLVS181H − DECEMBER 1998 − REVISED JANUARY 2004

1

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

(2)

Input voltage range

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.3 V to 10 V

Voltage range at EN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.3 V to V + 0.3 V

I

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 junction temperature range, T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −40°C to 150°C

J

Storage temperature range, T

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65°C to 150°C

stg

(1)

(2)

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 ground terminal.

DISSIPATION RATING TABLE

DERATING FACTOR

T

≤ 25°C

T

= 70°C

T = 85°C

A

BOARD

PACKAGE

R

θJC

θJA

ABOVE T = 25°C

POWER RATING POWER RATING POWER RATING

A

(1)

(2)

Low K

DBV

65.8 °C/W

259 °C/W

180 °C/W

3.9 mW/°C

5.6 mW/°C

386 mW

555 mW

212 mW

305 mW

154 mW

222 mW

High K

(1)

The JEDEC Low K (1s) board design used to derive this data was a 3 inch x 3 inch, two layer board with 2 ounce copper traces on top of the

board.

The JEDEC High K (2s2p) board design used to derive this data was a 3 inch x 3 inch, multilayer board with 1 ounce internal power and ground

planes and 2 ounce copper traces on top and bottom of the board.

(2)

recommended operating conditions

MIN NOM

MAX

10

UNIT

V

(1)

Input voltage, V

2.7

0

I

Continuous output current, I

150

125

mA

°C

O

Operating junction temperature, T

−40

J

(1)

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

= V + V

V

I(min)

O(max) DO(max load)

3

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SLVS181H − DECEMBER 1998 − REVISED JANUARY 2004

electrical characteristics over recommended operating free-air temperature range,

V = V + 1 V, I = 1 mA, EN = IN, C = 4.7 µF (unless otherwise noted)

I

O(typ)

O

o

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

1.02V

UNIT

3.25 V > V ≥ 2.7 V, = 1 mA to 75 mA,

I

O

0.98V

V

O

2.5 V ≥ V ≥ 1.5 V,

T = 25°C

J

O

3.25 V > V ≥ 2.7 V,

I

O

= 1 mA to 75 mA,

I

0.97V

0.98V

V

1.03V

1.02V

2.5 V ≥ V ≥ 1.5 V

O

V ≥ 3.25 V,

I

= 1 mA to 100 mA,

I

O

5 V ≥ V ≥ 1.5 V

T = 25°C

J

O

TPS76301

V

V ≥ 3.25 V,

I

O

= 1 mA to 100 mA,

I

0.97V

1.03V

5 V ≥ V ≥ 1.5 V

O

V ≥ 3.25 V,

I

= 1 mA to 150 mA,

I

O

0.975V

0.9625V

1.025V

1.0375V

5 V ≥ V ≥ 1.5 V

T = 25°C

J

O

V ≥ 3.25 V,

I

O

= 1 mA to 150 mA,

I

5 V ≥ V ≥ 1.5 V

O

1 mA< I < 75 mA,

T = 25°C

J

O

V = 2.7 V,

1.568

1.552

1.568

1.552

1.560

1.536

1.764

1.746

1.764

1.746

1.755

1.6

1.8

1.632

1.648

1.632

1.648

1.640

1.664

1.836

1.854

1.836

1.854

1.845

I

V = 2.7 V,

I

1 mA< I < 75 mA

O

1 mA < I < 100 mA,

O

V = 3.25 V,

I

T = 25°C

J

TPS76316

V

V = 3.25 V,

I

1 mA < I < 100 mA

O

1 mA < I < 150 mA,

O

V = 3.25 V,

I

T = 25°C

J

V = 3.25 V,

I

1 mA < I < 150 mA

O

1 mA< I < 75 mA,

O

V = 2.7 V,

I

T = 25°C

J

V = 2.7 V,

I

1 mA< I < 75 mA

O

V

O

Output voltage

1 mA < I < 100 mA,

O

V = 3.25 V,

I

T = 25°C

J

TPS76318

V

V = 3.25 V,

I

1 mA < I < 100 mA

O

1 mA < I < 150 mA,

O

V = 3.25 V,

I

T = 25°C

J

V = 3.25 V,

1 mA < I < 150 mA

1.733

2.45

1.8

2.5

2.7

2.8

3.0

1.867

2.55

I

O

I

O

I

O

I

O

I

O

I

O

I

O

I

O

I

O

I

O

I

O

I

O

I

O

I

O

I

O

I

O

I

O

= 1 mA to 100 mA,

= 1 mA to 100 mA

= 1 mA to 150 mA,

= 1 mA to 150 mA

= 1 mA to 100 mA,

= 1 mA to 100 mA

= 1 mA to 150 mA,

= 1 mA to 150 mA

= 1 mA to 100 mA,

= 1 mA to 100 mA

= 1 mA to 150 mA,

= 1 mA to 150 mA

= 1 mA to 100 mA,

= 1 mA to 100 mA

= 1 mA to 150 mA,

= 1 mA to 150 mA

T = 25°C

J

2.425

2.438

2.407

2.646

2.619

2.632

2.599

2.744

2.716

2.73

2.575

2.562

2.593

2.754

2.781

2.767

2.801

2.856

2.884

2.87

TPS76325

TPS76327

TPS76328

TPS76330

V

T = 25°C

J

T = 25°C

J

T = 25°C

J

T = 25°C

J

T = 25°C

J

2.695

2.94

2.905

3.06

T = 25°C

J

2.91

3.09

T = 25°C

J

2.925

2.888

3.075

3.112

4

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SLVS181H − DECEMBER 1998 − REVISED JANUARY 2004

electrical characteristics over recommended operating free-air temperature range,

V = V + 1 V, I = 1 mA, EN = IN, C = 4.7 µF (unless otherwise noted) (continued)

I

O(typ)

O

o

PARAMETER

TEST CONDITIONS

MIN

3.234

3.201

3.218

3.177

3.724

3.705

3.686

3.667

4.875

4.825

4.750

4.80

TYP

3.3

3.8

5

MAX

3.366

3.399

3.382

3.423

3.876

3.895

3.914

3.933

5.125

5.175

5.15

5.20

100

UNIT

I

O

I

O

I

O

I

O

I

O

I

O

I

O

I

O

I

O

I

O

I

O

I

O

I

O

I

O

= 1 mA to 100 mA,

= 1 mA to 100 mA

= 1 mA to 150 mA,

= 1 mA to 150 mA

= 1 mA to 100 mA,

= 1 mA to 100 mA

= 1 mA to 150 mA,

= 1 mA to 150 mA

= 1 mA to 100 mA,

= 1 mA to 100 mA

= 1 mA to 150 mA,

= 1 mA to 150 mA

= 0 to 150 mA,

T = 25°C

J

TPS76333

TPS76338

TPS76350

V

T = 25°C

J

T = 25°C

J

V

Output voltage

V

O

T = 25°C

J

T = 25°C

J

5

T = 25°C

J

5

T = 25°C (1)

J

85

Quiescent current

I

(Q)

(GND terminal current)

= 0 to 150 mA

(2)

140

µA

µV

EN < 0.5 V,

T = 25°C

J

0.5

1

Standby current

EN < 0.5 V

2

BW = 300 Hz to 50 kHz,

T = 25°C,

J

V

n

Output noise voltage

C

= 10 µF (2)

o

140

PSRR Ripple rejection

Current limit

f = 1 kHz, C = 10 µF,

T = 25°C (2)

60

0.8

dB

A

o

J

T = 25°C

J

(3)

0.5

1.5

0.07

0.1

2

V

+ 1 V < V ≤ 10 V,

V ≥ 3.5 V, T = 25°C

I

0.04

Output voltage line regulation

(∆V /V ) (see Note 3)

O

I

J

%/V

V

+ 1 V < V ≤ 10 V,

V ≥ 3.5 V

I

O

I

V

EN high level input

EN low level input

(2)

1.4

1.2

IH

IL

EN = 0 V

EN = IN

−0.01

−0.5

I

EN input current

µA

(1)

(2)

(3)

Minimum IN operating voltage is 2.7 V or V

+ 1 V, whichever is greater.

O(typ)

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

O

If V < 2.5 V and V

Imax

= 10 V, V

Imin

= 3.5 V:

O

_Oǒ_VImax_{* 3.5 V}Ǔ

V

ǒ

Ǔ

Line Reg. (mV) + %ńV

1000

100

If V > 2.5 V and V

Imax

= 10 V, V = V + 1 V:

O

Imin

O

_*ǒ_VO

100

Ǔ

_Oǒ_VImax

_) 1Ǔ

V

ǒ

Ǔ

Line Reg. (mV) + %ńV

1000

5

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SLVS181H − DECEMBER 1998 − REVISED JANUARY 2004

electrical characteristics over recommended operating free-air temperature range,

V = V

+ 1 V, I = 1 mA, EN = IN, C = 4.7 µF (unless otherwise noted) (continued)

I

O(typ)

O

o

PARAMETER

TEST CONDITIONS

MIN

TYP

0.2

3

MAX

UNIT

I

O

I

O

I

O

I

O

I

O

I

O

I

O

I

O

I

O

I

O

I

O

I

O

I

O

I

O

I

O

I

O

I

O

I

O

I

O

I

O

I

O

I

O

I

O

I

O

I

O

I

O

I

O

I

O

I

O

I

O

= 0 mA,

T = 25°C

J

= 1 mA,

T = 25°C

J

= 50 mA,

= 50 mA

= 75 mA,

= 75 mA

= 100 mA,

= 100 mA

= 150 mA,

= 150 mA

= 0 mA,

T = 25°C

J

120

150

200

225

300

400

450

600

T = 25°C

J

180

240

360

TPS76325

TPS76333

TPS76350

mV

T = 25°C

J

T = 25°C

J

T = 25°C

J

0.2

3

= 1 mA,

T = 25°C

J

= 50 mA,

= 50 mA

= 75 mA,

= 75 mA

= 100 mA,

= 100 mA

= 150 mA,

= 150 mA

= 0 mA,

T = 25°C

J

100

125

166

188

250

333

375

500

T = 25°C

J

150

200

300

V

DO

Dropout voltage

T = 25°C

J

T = 25°C

J

T = 25°C

J

0.2

2

= 1 mA,

T = 25°C

J

= 50 mA,

= 50 mA

= 75 mA,

= 75 mA

= 100 mA,

= 100 mA

= 150 mA,

= 150 mA

T = 25°C

J

60

75

100

113

150

200

225

300

T = 25°C

J

90

120

180

T = 25°C

J

T = 25°C

J

6

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SLVS181H − DECEMBER 1998 − REVISED JANUARY 2004

TYPICAL CHARACTERISTICS

TPS76325

TPS76318

OUTPUT VOLTAGE

vs

OUTPUT VOLTAGE

vs

OUTPUT CURRENT

2.505

2.5

1.805

1.800

1.795

1.790

1.785

1.780

V = 3.5 V

I

V = 3.5 V

I

C = C = 4.7 µF

I

J

O

= 25°C

C = C = 4.7 µF

I

J

O

= 25°C

T

2.495

2.49

2.485

2.48

1.775

1.770

2.475

0

30

60

90

120

150

180

0

30

60

90

120

150

180

I

O

− Output Current − mA

I

O

− Output Current − mA

Figure 1

Figure 2

TPS76350

OUTPUT VOLTAGE

vs

TPS76325

OUTPUT VOLTAGE

vs

OUTPUT CURRENT

FREE-AIR TEMPERATURE

5.01

5

2.53

2.52

2.51

2.5

V = 6 V

I

V = 3.5 V

I

C = C = 4.7 µF

I

J

O

= 25°C

C = C = 4.7 µF

I

O

T

4.99

4.98

4.97

4.96

I

= 1 mA

O

I

= 150 mA

2.49

O

2.48

2.47

4.95

0

30

60

90

120

150

180

−55 −35 −15

5

25

45

65

85 105 125

I

O

− Output Current − mA

T

J

− Junction Temperature − °C

Figure 4

Figure 3

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SLVS181H − DECEMBER 1998 − REVISED JANUARY 2004

TYPICAL CHARACTERISTICS

TPS76318

TPS76350

OUTPUT VOLTAGE

vs

OUTPUT VOLTAGE

vs

FREE-AIR TEMPERATURE

1.82

1.81

1.8

5.1

5.08

5.06

5.04

5.02

5

V = 6 V

I

C = C = 4.7 µF

I

O

I

O

= 1 mA

1.79

1.78

1.77

1.76

I

O

= 1 mA

I

O

= 150 mA

4.98

4.96

4.94

I

= 150 mA

O

V = 3.5 V

I

1.75

1.74

C = C = 4.7 µF

4.92

4.9

I

O

−55 −35 −15

5

25

45

65

85 105 125

−55 −35 −15

5

25

45

65

85 105 125

T

J

− Junction Temperature − °C

T

J

− Junction Temperature − °C

Figure 5

Figure 6

TPS76350

OUTPUT NOISE

vs

FREQUENCY

GROUND CURRENT

vs

FREE-AIR TEMPERATURE

1000

Ǹ

3mV Hz

T

J

= 25°C

V = 6 V

I

Ǹ

C = C = 4.7 µF

I

O

2.5mV Hz

C = 10 µF

O

I

= 0 mA and 150 mA

I

= 150 mA

Ǹ

2mV Hz

C

= 4.7 µF

= 150 mA

O

I

O

Ǹ

1.5mV Hz

100

Ǹ

1mV Hz

C

= 4.7 µF

= 1 mA

O

I

O

Ǹ

0.5mV Hz

C

= 10 µF

= 1 mA

O

I

O

Ǹ

0mV Hz

10

−55 −35 −15

1k

10k

100k

5

25

45

65

85 105 125

250

f − Frequency − Hz

T

J

− Junction Temperature − °C

Figure 7

Figure 8

8

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SLVS181H − DECEMBER 1998 − REVISED JANUARY 2004

TYPICAL CHARACTERISTICS

TPS76325

DROPOUT VOLTAGE

vs

OUTPUT IMPEDANCE

vs

FREE-AIR TEMPERATURE

FREQUENCY

600

500

400

300

200

10

V = EN = 2.7 V

I

C = C = 4.7 µF

I

O

150 mA

I

O

= 1 mA

1

I

O

= 150 mA

1 mA

0 mA

100

0

C = C = 4.7 µF

I

O

ESR = 1 Ω

T

J

= 25°C

0.1

0.01

−55 −35 −15

5

25

45

65

85 105 125

0.1

1

10

100

1000

T

J

− Junction Temperature − °C

f − Frequency − kHz

Figure 9

Figure 10

TPS76325

RIPPLE REJECTION

vs

FREQUENCY

70

60

50

I

O

= 1 mA

I

O

= 150 mA

40

30

20

10

0

C

= 4.7 µF

O

ESR = 1 Ω

T

J

= 25°C

−10

10

100

1 k

10 k

100 k

1 M

10 M

f − Frequency − Hz

Figure 11

9

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SLVS181H − DECEMBER 1998 − REVISED JANUARY 2004

TYPICAL CHARACTERISTICS

TPS76318

LINE TRANSIENT RESPONSE

TPS76318

LOAD TRANSIENT RESPONSE

5

4

3

2

1

200

100

0

C

= 4.7 µF

O

ESR = 0.25 Ω

= 25°C

50

0

T

J

C

= 4.7 µF

O

ESR = 0.25 Ω

= 25°C

T

J

20

0

−50

dv

dt

1 V

10 ms

+

−100

−150

−20

−30

0

20 40 60 80 100 120 140 160 180 200

0

20 40 60 80 100 120 140 160 180 200

t − Time − µs

Figure 12

Figure 13

TPS76350

LOAD TRANSIENT RESPONSE

TPS76350

LINE TRANSIENT RESPONSE

200

100

0

8

7

6

5

C

= 4.7 µF

O

ESR = 0.25 Ω

= 25°C

dv

dt

1 V

10 ms

+

T

J

C

= 4.7 µF

O

150

100

0

ESR = 0.25 Ω

= 25°C

50

0

T

J

−100

−200

−50

−100

0

20 40 60 80 100 120 140 160 180 200

0

50 100 150 200 250 300 350 400 450 500

t − Time − µs

Figure 14

Figure 15

10

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SLVS181H − DECEMBER 1998 − REVISED JANUARY 2004

TYPICAL CHARACTERISTICS

TYPICAL REGIONS OF STABILITY

COMPENSATION SERIES RESISTANCE (CSR)

vs

(1)

COMPENSATION SERIES RESISTANCE (CSR)

vs

OUTPUT CURRENT

ADDED CERAMIC CAPACITANCE

100

Region of Instability

10

1

10

1

C

T

= 4.7 µF

I = 150 mA

C = 4.7 µF

O

J

O

J

= 25°C

T

= 25°C

0.1

Region of Instability

0.01

0

50

100

150

200

250

0

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9

1

I

O

− Output Current − mA

Added Ceramic Capacitance − µF

Figure 16

Figure 17

TYPICAL REGIONS OF STABILITY

(1)

COMPENSATION SERIES RESISTANCE (CSR)

vs

OUTPUT CURRENT

ADDED CERAMIC CAPACITANCE

100

Region of Instability

10

1

10

1

C

= 10 µF

O

C

= 10 µF

O

0.1

Region of Instability

0.01

0

50

100

150

200

250

0

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9

1

I

O

− Output Current − mA

Added Ceramic Capacitance − µF

Figure 19

Figure 18

(1)

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

resistance to C

.

O

11

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SLVS181H − DECEMBER 1998 − REVISED JANUARY 2004

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 µA), and an enable

input to reduce supply currents to less than 2 µA 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 µA. EN should be

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

A typical application circuit is shown in Figure 20.

(1)

TPS763xx

1

3

V

IN

I

4

5

NC/FB

OUT

V

O

C1

1 µF

EN

+

4.7 µF

GND

CSR = 1 Ω

2

(1)

TPS76316, TPS76318, TPS76325, TPS76327, TPS76328,

TPS7630 TPS76333, TPS76338, TPS76350 (fixed-voltage options).

Figure 20. Typical Application Circuit

12

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SLVS181H − DECEMBER 1998 − REVISED JANUARY 2004

APPLICATION INFORMATION

external capacitor requirements

Although not required, a 0.047 µF 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 µF and the ESR (equivalent series

resistance) must be between 0.3 Ω and 10 Ω. Capacitor values 4.7 µF or larger are acceptable, provided the ESR is less

than 10 Ω. 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 µF surface-mount solid tantalum

capacitors, including devices from Sprague, Kemet, and Nichico, meet the ESR requirements stated above.

CAPACITOR SELECTION

†

(1)

PART NO.

MFR.

KEMET

SPRAGUE

AVX

VALUE

4.7 µF

10 µF

4.7 µF

MAX ESR

1.5 Ω

SIZE (H × L × W)

1.9 × 3.5 × 2.8

1.3 × 7.0 × 2.7

2.5 × 7.6 × 2.5

2.6 × 6.0 × 3.2

T494B475K016AS

195D106x0016x2T

695D106x003562T

1.5 Ω

1.3 Ω

0.6 Ω

TPSC475K035R0600

(1)

Size is in mm. ESR is maximum resistance in ohms at 100 kHz and T = 25°C. Listings are sorted by height.

A

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:

R1

R2

ǒ_{1 )}

Ǔ

(1)

V

+ 0.995 V

O

ref

Where:

_ref= 1.192 V typ (the internal reference voltage)

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

V

Resistors R1 and R2 should be chosen for approximately 7-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 = 169 kΩ to set the divider current at 7 µA and

then calculate R1 using:

V

O

R1 +

ǒ

* 1

Ǔ

R2

(2)

0.995 V

ref

13

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SLVS181H − DECEMBER 1998 − REVISED JANUARY 2004

APPLICATION INFORMATION

TPS76301

OUTPUT VOLTAGE

PROGRAMMING GUIDE

DIVIDER RESISTANCE

1

OUTPUT

VOLTAGE

(V)

V

I

IN

(1)

(kΩ)

1 µF

R1

R2

5

V

2.5

3.3

3.6

4

187

301

348

402

549

750

169

OUT

FB

O

≥2 V

3

R1

R2

EN

≤0.5 V

4

+

4.7 µF

GND

2

5

CSR = 1 Ω

6.45

(1)

1% values shown.

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:

T max * T

.

J

A

P

+

D(max)

R

qJA

Where:

T max is the maximum allowable junction temperature

J

R

is the thermal resistance junction-to-ambient for the package, see the dissipation rating table.

θJA

T is the ambient temperature.

A

The regulator dissipation is calculated using:

₊ǒ_VI_* V

Ǔ

P

I

D

O

Power dissipation resulting from quiescent current is negligible.

14

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SLVS181H − DECEMBER 1998 − REVISED JANUARY 2004

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.

15

PACKAGE OPTION ADDENDUM

www.ti.com

8-Aug-2005

PACKAGING INFORMATION

Orderable Device

TPS76301DBVR

TPS76301DBVRG4

TPS76301DBVT

Status ⁽¹⁾

ACTIVE

Package Package

Pins Package Eco Plan ⁽²⁾Lead/Ball Finish MSL Peak Temp ⁽³⁾

Qty

Type

Drawing

SOT-23

DBV

5

3000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

SOT-23

DBV

3000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

250 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

TPS76301DBVTG4

TPS76316DBVR

TPS76316DBVRG4

TPS76316DBVT

250 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

3000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

3000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

250 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

TPS76316DBVTG4

TPS76318DBVR

TPS76318DBVRG4

TPS76318DBVT

250 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

3000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

3000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

250 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

TPS76318DBVTG4

TPS76325DBVR

TPS76325DBVRG4

TPS76325DBVT

250 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

3000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

3000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

250 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

TPS76325DBVTG4

250 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

TPS76327DBV

OBSOLETE SOT-23

DBV

5

TBD

Call TI

TPS76327DBVR

ACTIVE

SOT-23

3000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

TPS76327DBVRG4

TPS76327DBVT

DBV

5

3000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

250 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

TPS76327DBVTG4

250 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

TPS76328DBV

OBSOLETE SOT-23

DBV

5

TBD

Call TI

TPS76328DBVR

ACTIVE

SOT-23

3000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

TPS76328DBVRG4

TPS76328DBVT

DBV

5

3000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

250 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

TPS76328DBVTG4

250 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

Addendum-Page 1

PACKAGE OPTION ADDENDUM

www.ti.com

8-Aug-2005

Orderable Device

Status ⁽¹⁾

Package Package

Pins Package Eco Plan ⁽²⁾Lead/Ball Finish MSL Peak Temp ⁽³⁾

Qty

Type

Drawing

no Sb/Br)

TPS76330DBV

OBSOLETE SOT-23

DBV

5

TBD

Call TI

TPS76330DBVR

ACTIVE

SOT-23

3000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

TPS76330DBVRG4

TPS76330DBVT

DBV

5

3000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

250 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

TPS76330DBVTG4

TPS76333DBVR

TPS76333DBVRG4

TPS76333DBVT

250 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

3000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

3000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

250 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

TPS76333DBVTG4

TPS76338DBVR

TPS76338DBVRG4

TPS76338DBVT

250 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

3000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

3000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

250 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

TPS76338DBVTG4

TPS76350DBVR

TPS76350DBVRG4

TPS76350DBVT

250 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

3000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

3000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

250 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

TPS76350DBVTG4

250 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

⁽¹⁾The marketing status values are defined as follows:

ACTIVE: Product device recommended for new designs.

LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.

NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in

a new design.

PREVIEW: Device has been announced but is not in production. Samples may or may not be available.

OBSOLETE: TI has discontinued the production of the device.

(2)

Eco Plan

-

The planned eco-friendly classification: Pb-Free (RoHS) or Green (RoHS

&

no Sb/Br)

-

please check

http://www.ti.com/productcontent for the latest availability information and additional product content details.

TBD: The Pb-Free/Green conversion plan has not been defined.

Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements

for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered

at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.

Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame

retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material)

(3)

MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder

temperature.

Addendum-Page 2

PACKAGE OPTION ADDENDUM

www.ti.com

8-Aug-2005

Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is

provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the

accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take

reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on

incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited

information may not be available for release.

In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI

to Customer on an annual basis.

Addendum-Page 3

IMPORTANT NOTICE

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enhancements, improvements, and other changes to its products and services at any time and to discontinue

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TI warrants performance of its hardware products to the specifications applicable at the time of sale in

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型号：	TPS763
厂家：	TEXAS INSTRUMENTS
描述：	具有使能功能的 150mA、10V、低压降稳压器电源电路线性稳压器IC
文件：	总20页 (文件大小：303K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

TPS763 [TI]

相关型号：

TPS763-Q1

TPS76301

TPS76301/76318/76325/76333/76350

TPS76301DBV

TPS76301DBVR

TPS76301DBVRG4

TPS76301DBVT

TPS76301DBVTG4

TPS76301QDBVRG4Q1

TPS76301QDBVRQ1

TPS76316

TPS76316DBV