Texas Instruments TPS76350DBVT, TPS76350DBVR, TPS76338DBVT, TPS76318DBVT, TPS76318DBVR Datasheet

TPS76301, TPS76316, TPS76318, TPS76325, TPS76327

40°C to 125°C

TPS76328, TPS76330, TPS76333, TPS76338, TPS76350

LOW-POWER 150-mA LOW-DROPOUT LINEAR REGULATORS

SLVS181E – DECEMBER 1998 – REVISED APRIL 2000

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-µA Quiescent Current in

GND

DBV PACKAGE

IN

EN

(TOP VIEW)

1

5

2

3

4

OUT

NC/FB

Shutdown Mode

D

–40°C to 125°C Operating Junction
T emperature 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 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

= 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 ,

J

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

J

°

–

†

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.

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.

VOLTAGE PACKAGE PART NUMBER SYMBOL

Variable TPS76301DBVT†TPS76301DBVR

1.6 V TPS76316DBVT†TPS76316DBVR

1.8 V TPS76318DBVT†TPS76318DBVR

2.5 V TPS76325DBVT†TPS76325DBVR

°

2.7 V

2.8 V

3.0 V TPS76330DBVT†TPS76330DBVR

3.3 V TPS76333DBVT†TPS76333DBVR

3.8 V TPS76338DBVT†TPS76338DBVR

5.0 V TPS76350DBVT†TPS76350DBVR

SOT-23

(DBV)

TPS76327DBVT†TPS76327DBVR
TPS76328DBVT†TPS76328DBVR

Copyright  2000, Texas Instruments Incorporated

‡

PAZI

‡

PBHI

‡

PBAI

‡

PBBI

‡

PBCI

‡

PBDI

‡

PBII

‡

PBEI

‡

PBFI

‡

PBGI

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

1

TPS76301, TPS76316, TPS76318, TPS76325, TPS76327

I/O

DESCRIPTION

TPS76328, TPS76330, TPS76333, TPS76338, TPS76350
LOW-POWER 150-mA LOW-DROPOUT LINEAR REGULATORS

SLVS181E – DECEMBER 1998 – REVISED APRIL 2000

functional block diagram

TPS76301

IN

EN

V

REF

GND

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

IN

EN

V

REF

GND

Terminal Functions

TERMINAL

NAME

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

OUT

Current Limit

/ Thermal

Protection

FB

OUT

Current Limit

/ Thermal

Protection

2

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

TPS76301, TPS76316, TPS76318, TPS76325, TPS76327
TPS76328, TPS76330, TPS76333, TPS76338, TPS76350

LOW-POWER 150-mA LOW-DROPOUT LINEAR REGULATORS

SLVS181E – DECEMBER 1998 – REVISED APRIL 2000

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

Input voltage range

Voltage range at EN –0.3 V to VI + 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
Storage temperature range, T

†

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.

Recommended DBV 350 mW 3.5 mW/°C 192 mW 140 mW

Maximum DBV 437 mW 3.5 mW/°C 280 mW 227 mW

(see Note 1)

stg

PACKAGE

–0.3 V to 10 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

–40°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

J

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

DISSIPATION RATING TABLE

TA ≤ 25°C

POWER RATING

DERATING FACTOR

ABOVE TA = 25°C

TA = 70°C

POWER RATING

TA = 85°C

POWER RATING

recommended operating conditions

MIN NOM MAX UNIT

= V

†

I

O(max)

O

+ V

DO(max load)

2.7 10 V
0 150 mA

J

–40 125 °C

Input voltage, V
Continuous output current, I
Operating junction temperature, T

†

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

I(min)

Ĕ

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

3

TPS76301, TPS76316, TPS76318, TPS76325, TPS76327

TPS76301

V

TPS76325

V

TPS76327

V

TPS76328

V

TPS76330

V

TPS76328, TPS76330, TPS76333, TPS76338, TPS76350
LOW-POWER 150-mA LOW-DROPOUT LINEAR REGULATORS

SLVS181E – DECEMBER 1998 – REVISED APRIL 2000

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

I

V

O

= V

+ 1 V, I

O(typ)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

Output voltage

= 1 mA, EN = IN, CO = 4.7 µF (unless otherwise noted)

O

TPS76316

TPS76318

3.25 V > VI ≥ 2.7 V,

2.5 V ≥ VO ≥ 1.5 V,

3.25 V > VI ≥ 2.7 V,

2.5 V ≥ VO ≥ 1.5 V
VI ≥ 3.25 V,

5 V ≥ VO ≥ 1.5 V
VI ≥ 3.25 V,

5 V ≥ VO ≥ 1.5 V
VI ≥ 3.25 V,

5 V ≥ VO ≥ 1.5 V
VI ≥ 3.25 V,

5 V ≥ VO ≥ 1.5 V
VI = 2.7 V,
VI = 2.7 V, 1 mA< IO < 75 mA 1.552 1.6 1.648
VI = 3.25 V,
VI = 3.25 V, 1 mA < IO < 100 mA 1.552 1.6 1.648
VI = 3.25 V,
VI = 3.25 V, 1 mA < IO < 150 mA 1.536 1.6 1.664
VI = 2.7 V,
VI = 2.7 V, 1 mA< IO < 75 mA 1.746 1.8 1.854
VI = 3.25 V,
VI = 3.25 V, 1 mA < IO < 100 mA 1.746 1.8 1.854
VI = 3.25 V,
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
IO = 1 mA to 100 mA 2.425 2.5 2.575
IO = 1 mA to 150 mA, TJ = 25°C 2.438 2.5 2.562
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
IO = 1 mA to 100 mA 2.619 2.7 2.781
IO = 1 mA to 150 mA, TJ = 25°C 2.632 2.7 2.767
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
IO = 1 mA to 100 mA 2.716 2.8 2.884
IO = 1 mA to 150 mA, TJ = 25°C 2.73 2.8 2.87
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
IO = 1 mA to 100 mA 2.91 3.0 3.09
IO = 1 mA to 150 mA, TJ = 25°C 2.925 3.0 3.075
IO = 1 mA to 150 mA 2.888 3.0 3.112

IO = 1 mA to 75 mA,
TJ = 25°C

IO = 1 mA to 75 mA,

IO = 1 mA to 100 mA,
TJ = 25°C

IO = 1 mA to 100 mA,

IO = 1 mA to 150 mA,
TJ = 25°C

IO = 1 mA to 150 mA,

1 mA< IO < 75 mA,
TJ = 25°C

1 mA < IO < 100 mA,
TJ = 25°C

1 mA < IO < 150 mA,
TJ = 25°C

1 mA< IO < 75 mA,
TJ = 25°C

1 mA < IO < 100 mA,
TJ = 25°C

1 mA < IO < 150 mA,
TJ = 25°C

0.98V

0.97V

0.98V

0.97V

0.975V

0.9625V

V

O

O

V

O

O

V

O

O

V

O

O

VO1.025V

O

VO1.0375V

O

1.568 1.6 1.632

1.568 1.6 1.632

1.560 1.6 1.640

1.764 1.8 1.836

1.764 1.8 1.836

1.755 1.8 1.845

1.02V

1.03V

1.02V

1.03V

O

O

O

O

O

O

V

V

4

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

TPS76301, TPS76316, TPS76318, TPS76325, TPS76327

TPS76333

V

VOOutput voltage

TPS76338

V

TPS76350

V

I

A

Standby current

gg

%/V

V

IIEN input current

A

TPS76328, TPS76330, TPS76333, TPS76338, TPS76350

LOW-POWER 150-mA LOW-DROPOUT LINEAR REGULATORS

SLVS181E – DECEMBER 1998 – REVISED APRIL 2000

electrical characteristics over recommended operating free-air temperature range,

= V

V

I

(Q)

V

n

PSRR Ripple rejection f = 1 kHz, Co = 10 µF, TJ = 25°C, See Note 2 60 dB

V

IH

V

IL

NOTES: 2. Minimum IN operating voltage is 2.7 V or V

+ 1 V, I

O(typ)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

p

Quiescent current
(GND terminal current)

Output noise voltage

Current limit TJ = 25°C, See Note 3 0.8 1.5 A
Output voltage line regulation

(∆VO/VO) (see Note 4)
EN high level input See Note 2 1.4 2

EN low level input See Note 2 0.5 1.2

p

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 V

If VO > 2.5 V and V

= 1 mA, EN = IN, CO = 4.7 µF (unless otherwise noted) (continued)

O

IO = 1 mA to 100 mA, TJ = 25°C 3.234 3.3 3.366
IO = 1 mA to 100 mA 3.201 3.3 3.399
IO = 1 mA to 150 mA, TJ = 25°C 3.218 3.3 3.382
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
IO = 1 mA to 100 mA 3.705 3.8 3.895
IO = 1 mA to 150 mA, TJ = 25°C 3.686 3.8 3.914
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
IO = 1 mA to 100 mA 4.825 5 5.175
IO = 1 mA to 150 mA, TJ = 25°C 4.750 5 5.15
IO = 1 mA to 150 mA 4.80 5 5.20
IO = 0 to 150 mA, TJ = 25°C, See Note 2 85 100
IO = 0 to 150 mA,
EN < 0.5 V, TJ = 25°C 0.5 1
EN < 0.5 V 2
BW = 300 Hz to 50 kHz,

TJ = 25°C,

VO + 1 V < VI ≤ 10 V, VI ≥ 3.5 V, TJ = 25°C 0.04 0.07
VO + 1 V < VI ≤ 10 V,

EN = 0 V –0.01 –0.5
EN = IN –0.01 –0.5

= 10 V, V

imax

Line Reg. (mV)

= 10 V, V

imax

Line Reg. (mV)

= 3.5 V:

imin

+ǒ%ńVǓ

= VO + 1 V:

imin

+ǒ%ńVǓ

+ 1 V, whichever is greater.

O(typ)

See Note 2 140

Co = 10 µF,
See Note 2

VI ≥ 3.5 V 0.1

ǒ

V

V

imax

O

100

ǒ

V

V

imax

O

100

*

3.5 V

*ǒVO)

Ǔ

1000

Ǔ

Ǔ

1

1000

140 µV

µ

µ

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

5

TPS76301, TPS76316, TPS76318, TPS76325, TPS76327

TPS76325

mV

VDODropout voltage

TPS76333

mV

TPS76350

mV

TPS76328, TPS76330, TPS76333, TPS76338, TPS76350
LOW-POWER 150-mA LOW-DROPOUT LINEAR REGULATORS

SLVS181E – DECEMBER 1998 – REVISED APRIL 2000

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

= V

I

O(typ)

p

+ 1 V, I

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

= 1 mA, EN = IN, CO = 4.7 µF (unless otherwise noted) (continued)

O

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
IO = 75 mA, TJ = 25°C 180 225
IO = 75 mA 300
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
IO = 75 mA, TJ = 25°C 150 188
IO = 75 mA 250
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
IO = 75 mA, TJ = 25°C 90 113
IO = 75 mA 150
IO = 100 mA, TJ = 25°C 120 150
IO = 100 mA 200
IO = 150 mA, TJ = 25°C 180 225
IO = 150 mA 300

6

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

TPS76301, TPS76316, TPS76318, TPS76325, TPS76327
TPS76328, TPS76330, TPS76333, TPS76338, TPS76350

LOW-POWER 150-mA LOW-DROPOUT LINEAR REGULATORS

SLVS181E – DECEMBER 1998 – REVISED APRIL 2000

TYPICAL CHARACTERISTICS

2.505

2.5

2.495

2.49

2.485

– Output Voltage – V

O

V

2.48

2.475

TPS76325

OUTPUT VOLTAGE

vs

OUTPUT CURRENT

VI = 3.5 V
CI = CO = 4.7 µF
TA = 25°C
Pulse Tested

30 90

0 150

60 120 180

IO – Output Current – mA

Figure 1

1.805

1.800

1.795

1.790

1.785

– Output Voltage – V

1.780

O

V

1.775

1.770
30 90

0

TPS76318

OUTPUT VOLTAGE

vs

OUTPUT CURRENT

VI = 3.5 V
CI = CO = 4.7 µF
TA = 25°C
Pulse Tested

60 120 180

IO – Output Current – mA

150

Figure 2

5.01

5

4.99

4.98

4.97

– Output Voltage – V

O

V

4.96

4.95

TPS76350

OUTPUT VOLTAGE

vs

OUTPUT CURRENT

VI = 6 V
CI = CO = 4.7 µF
TA = 25°C
Pulse Tested

0 150

30 90

60 120 180

IO – Output Current – mA

Figure 3

TPS76325

OUTPUT VOLTAGE

FREE-AIR TEMPERATURE

2.53

2.52

2.51
IO = 1 mA

2.5

2.49

– Output Voltage – V

O

V

2.48

2.47

–55 45 65

IO = 150 mA

–35 5

–15 25 125

TA – Free-Air Temperature – °C

Figure 4

vs

VI = 3.5 V
CI = CO = 4.7 µF

85 105

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

7

TPS76301, TPS76316, TPS76318, TPS76325, TPS76327
TPS76328, TPS76330, TPS76333, TPS76338, TPS76350
LOW-POWER 150-mA LOW-DROPOUT LINEAR REGULATORS

SLVS181E – DECEMBER 1998 – REVISED APRIL 2000

TYPICAL CHARACTERISTICS

1.82

1.81

1.8

1.79

1.78

1.77

– Output Voltage – V

O

V

1.76

1.75

1.74
–55

TPS76318

OUTPUT VOLTAGE

vs

FREE-AIR TEMPERATURE

IO = 1 mA

IO = 150 mA

VI = 3.5 V
CI = CO = 4.7 µF

–35 5

–15 25 125

TA – Free-Air Temperature – °C

45 65 85 105

Figure 5

5.1

5.08

5.06

5.04

5.02

5

4.98

– Output Voltage – V

4.96

O

V

4.94

4.92

4.9
–55

TPS76350

OUTPUT VOLTAGE

vs

FREE-AIR TEMPERATURE

VI = 6 V
CI = CO = 4.7 µF

IO = 1 mA

IO = 150 mA

–15 25 125

–35 5

TA – Free-Air Temperature – °C

45 65

85 105

Figure 6

Ground Current – Aµ

1000

100

10

TPS76350

GROUND CURRENT

vs

FREE-AIR TEMPERATURE

VI = 6 V
CI = CO = 4.7 µF
IO = 0 mA and 150 mA

–35 5–15 25 125–55

TA – Free-Air Temperature – °C

Figure 7

45 65

85 105

Ǹ

3µVHz

Ǹ

2.5µVHz

Ǹ

2µVHz

Ǹ

1.5µVHz

Output Noise

Ǹ

1µVHz

Ǹ

0.5µVHz

Ǹ

0µVHz

250

OUTPUT NOISE

vs

FREQUENCY

TA = 25°C

CO = 10 µF
IO = 150 mA

CO = 4.7 µF
IO = 150 mA

CO = 4.7 µF
IO = 1 mA

CO = 10 µF
IO = 1 mA

1k 10k 100k

f – Frequency – Hz

Figure 8

8

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

TPS76301, TPS76316, TPS76318, TPS76325, TPS76327
TPS76328, TPS76330, TPS76333, TPS76338, TPS76350

LOW-POWER 150-mA LOW-DROPOUT LINEAR REGULATORS

SLVS181E – DECEMBER 1998 – REVISED APRIL 2000

TYPICAL CHARACTERISTICS

OUTPUT IMPEDANCE

FREQUENCY

10

Ω

1

– Output Impedance –Z

o

0.1

0.01 10

IO = 1 mA

IO = 150 mA

CI = CO = 4.7 µF
ESR = 1 Ω
TA = 25°C

0.1 1 1000
f – Frequency – kHz

Figure 9

vs

70

100

TPS76325

RIPPLE REJECTION

FREQUENCY

600

500

400

300

200

– Dropout Voltage – mV

DO

V

100

vs

VI = EN = 2.7 V
CI = CO = 4.7 µF

0

–35 5

–55

TPS76325

DROPOUT VOLTAGE

vs

FREE-AIR TEMPERATURE

150 mA

0 mA

–15 25 125

TA – Free-Air Temperature – °C

1 mA

45 65

85 105

Figure 10

60

50

40

30

20

Ripple Rejection – dB

10

CO = 4.7 µF

0

ESR = 1 Ω
TA = 25°C

–10

10

IO = 1 mA

IO = 150 mA

10 M1 M100 k10 k1 k100

f – Frequency – Hz

Figure 11

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

9

TPS76301, TPS76316, TPS76318, TPS76325, TPS76327
TPS76328, TPS76330, TPS76333, TPS76338, TPS76350
LOW-POWER 150-mA LOW-DROPOUT LINEAR REGULATORS

SLVS181E – DECEMBER 1998 – REVISED APRIL 2000

TYPICAL CHARACTERISTICS

5

4

3

– Input Voltage – V

I

2

V

1

20

0

–20

– Change in

O

V

∆

–30

Output Voltage – mV

0604020 80 100 140120 160 180 200

8

7

6

– Input Voltage – V

I

V

5

50

0

– Change in

–50

O

V

∆

Output Voltage – mV

–100

0 15010050 200 250 350300 400 450 500

TPS76318

LINE TRANSIENT RESPONSE

CO = 4.7 µF
ESR = 0.25 Ω
TA = 25°C

t – Time – µs

Figure 12

TPS76350

LINE TRANSIENT RESPONSE

t – Time – µs

Figure 14

dv

1V

+

10 µs

dt

dv

1V

+

10 µs

dt

CO = 4.7 µF
ESR = 0.25 Ω
TA = 25°C

LOAD TRANSIENT RESPONSE

200

100

0

O

I – Output Current – mA

50

0

–50

– Change in∆

O

V

–100

Output Voltage – mV

–150

0604020 80 100 140120 160 180 200

LOAD TRANSIENT RESPONSE

200

100

0

O

I – Output Current – mA

150

100

0

– Change in∆

O

V

–100

Output Voltage – mV

–200

0604020 80 100 140120 160 180 200

TPS76318

CO = 4.7 µF
ESR = 0.25 Ω
TA = 25°C

t – Time – µs

Figure 13

TPS76350

CO = 4.7 µF
ESR = 0.25 Ω
TA = 25°C

t – Time – µs

Figure 15

10

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TPS76301, TPS76316, TPS76318, TPS76325, TPS76327
TPS76328, TPS76330, TPS76333, TPS76338, TPS76350

LOW-POWER 150-mA LOW-DROPOUT LINEAR REGULATORS

SLVS181E – DECEMBER 1998 – REVISED APRIL 2000

TYPICAL CHARACTERISTICS

TYPICAL REGIONS OF STABILITY

COMPENSATION SERIES RESISTANCE (CSR)

vs

OUTPUT CURRENT

100

Region of Instability

10

CO = 4.7 µF

1

0.1

CSR – Compensation Series Resistance – Ω

0.01
0 50 100 150 200 250

Region of Instability

IO – Output Current – mA

TA = 25°C

Figure 16

†

COMPENSATION SERIES RESISTANCE (CSR)

TYPICAL REGIONS OF STABILITY

†

vs

ADDED CERAMIC CAPACITANCE

100

Region of Instability

10

I = 150 mA

1

0.1

CSR – Compensation Series Resistance – Ω

0.01
0 0.1 0.2 0.3 0.4 0.5

Added Ceramic Capacitance – µF

CO = 4.7 µF
TA = 25°C

Region of Instability

0.6 0.7 0.8 0.9 1

Figure 17

TYPICAL REGIONS OF STABILITY

COMPENSATION SERIES RESISTANCE (CSR)

†

COMPENSATION SERIES RESISTANCE (CSR)

vs

OUTPUT CURRENT

100

Region of Instability

10

1

0.1
Region of Instability

CSR – Compensation Series Resistance – Ω

0.01
0 50 100 150 200 250

IO – Output Current – mA

CO = 10 µF

100

10

1

0.1

CSR – Compensation Series Resistance – Ω

0.01
0 0.1 0.2 0.3 0.4 0.5

Figure 18

†

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

TYPICAL REGIONS OF STABILITY

vs

ADDED CERAMIC CAPACITANCE

Region of Instability

CO = 10 µF

Region of Instability

0.6 0.7 0.8 0.9 1

Added Ceramic Capacitance – µF

Figure 19

†

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11

TPS76301, TPS76316, TPS76318, TPS76325, TPS76327
TPS76328, TPS76330, TPS76333, TPS76338, TPS76350
LOW-POWER 150-mA LOW-DROPOUT LINEAR REGULATORS

SLVS181E – DECEMBER 1998 – REVISED APRIL 2000

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

V

I

C1

1 µF

†

TPS76316, TPS76318, TPS76325, TPS76327, TPS76328, TPS7630
TPS76333, TPS76338, TPS76350 (fixed-voltage options).

IN

3

EN

Figure 20. Typical Application Circuit

TPS763xx

NC/FB

OUT

GND

2

†

4

5

V

O

+

4.7 µF

CSR = 1 Ω

12

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TPS76301, TPS76316, TPS76318, TPS76325, TPS76327
TPS76328, TPS76330, TPS76333, TPS76338, TPS76350

LOW-POWER 150-mA LOW-DROPOUT LINEAR REGULATORS

SLVS181E – DECEMBER 1998 – REVISED APRIL 2000

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 0.2 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. Multilayer ceramic capacitors should have
minimum values of 1 µF over the full operating temperature range of the equipment.

CAP ACITOR SELECTION

PART NO. MFR. VALUE MAX ESR

T494B475K016AS KEMET 4.7 µF 1.5 Ω 1.9 × 3.5 × 2.8
195D106x0016x2T SPRAGUE 10 µF 1.5 Ω 1.3 × 7.0 × 2.7
695D106x003562T SPRAGUE 10 µF 1.3 Ω 2.5 × 7.6 × 2.5
TPSC475K035R0600 AVX 4.7 µF 0.6 Ω 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.

†

SIZE (H × L × W)

†

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

VO+

0.995 V

Where:

V

= 1.192 V typ (the internal reference voltage)

ref

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

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:

R1

+

ǒ

0.995 V

ǒ1

ref

V

O

*

ref

)

1

Ǔ

R2

Ǔ

R2

(1)

(2)

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13

TPS76301, TPS76316, TPS76318, TPS76325, TPS76327
TPS76328, TPS76330, TPS76333, TPS76338, TPS76350
LOW-POWER 150-mA LOW-DROPOUT LINEAR REGULATORS

SLVS181E – DECEMBER 1998 – REVISED APRIL 2000

APPLICATION INFORMATION

OUTPUT VOLTAGE

PROGRAMMING GUIDE

OUTPUT

VOLTAGE

(V)

2.5

3.3

3.6

6.45

†

1% values shown.

DIVIDER RESISTANCE

4
5

†

(kΩ)

R1 R2

187
301
348
402
549
750

169
169
169
169
169
169

≤0.5 V

V

I

1 µF

≥2 V

1

3

TPS76301

IN

EN

GND

2

OUT

FB

5

4

R1

+

4.7 µF

R2

CSR = 1 Ω

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
P

D(max)

.

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

, and the actual dissipation, PD, which must be less than or equal to

D(max)

V

O

P

D(max)

TJmax*T

+

R

A

q

JA

Where:

T

max is the maximum allowable junction temperature

J

R

is the thermal resistance junction-to-ambient for the package, i.e., 285°C/W for the 5-terminal

θJA

SOT23.
T

is the ambient temperature.

A

The regulator dissipation is calculated using:

PD+ǒVI*

Ǔ

V

I

O

O

Power dissipation resulting from quiescent current is negligible.

14

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TPS76301, TPS76316, TPS76318, TPS76325, TPS76327
TPS76328, TPS76330, TPS76333, TPS76338, TPS76350

LOW-POWER 150-mA LOW-DROPOUT LINEAR REGULATORS

SLVS181E – DECEMBER 1998 – REVISED APRIL 2000

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.

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

15

TPS76301, TPS76316, TPS76318, TPS76325, TPS76327
TPS76328, TPS76330, TPS76333, TPS76338, TPS76350
LOW-POWER 150-mA LOW-DROPOUT LINEAR REGULATORS

SLVS181E – DECEMBER 1998 – REVISED APRIL 2000

MECHANICAL DATA

DBV (R-PDSO-G5) PLASTIC SMALL-OUTLINE PACKAGE

0,95

1,30
1,00

0,40
0,20

45

1,80
1,50

1

3,10

2,70

3

0,05 MIN

M

0,25

3,00
2,50

Seating Plane

0,10

0,15 NOM

0°–8°

Gage Plane

0,25

0,55
0,35

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.

4073253-4/B 10/97

16

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