Texas Instruments TPS76933DBVR, TPS76930DBVT, TPS76930DBVR, TPS76928DBVT, TPS76928DBVR Datasheet

TPS76901, TPS76912, TPS76915, TPS76918, TPS76925
TPS76927, TPS76928, TPS76930, TPS76933, TPS76950

ULTRALOW-POWER 100-mA LOW-DROPOUT LINEAR REGULATORS

SLVS203D – JUNE 1999 – REVISED APRIL 2000

1

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

D

100-mA Low-Dropout Regulator

D

Available in 1.2-V, 1.5-V, 1.8-V, 2.5-V, 2.7-V,

2.8-V, 3.0-V, 3.3-V, and 5-V Fixed-Output and
Adjustable Versions

D

Only 17 µA Quiescent Current at 100 mA

D

1 µA Quiescent Current in Standby Mode

D

Dropout Voltage Typically 71 mV at 100mA

D

Over Current Limitation

D

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

D

5-Pin SOT-23 (DBV) Package

description

The TPS769xx family of low-dropout (LDO)
voltage regulators offers the benefits of low
dropout voltage, ultralow-power operation, and
miniaturized packaging. These regulators feature
low dropout voltages and ultralow quiescent
current compared to conventional LDO
regulators. Offered in a 5-terminal small outline
integrated-circuit SOT-23 package, the
TPS769xx series devices are ideal for
micropower operations 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 71 mV at 100 mA of
load current (TPS76950), and is directly proportional to the load current. Since the PMOS pass element is a
voltage-driven device, the quiescent current is ultralow (28 µA maximum) and is stable over the entire range
of output load current (0 mA to 100 mA). Intended for use in portable systems such as laptops and cellular
phones, the ultralow-dropout voltage feature and ultralow-power operation result in a significant increase in
system battery operating life.

The TPS769xx also features a logic-enabled sleep mode to shut down the regulator, reducing quiescent current
to 1 µA typical at T

J

= 25°C. The TPS769xx is offered in 1.2-V, 1.5-V, 1.8-V, 2.5-V, 2.7-V, 2.8-V, 3.0-V, 3.3-V,

and 5-V fixed-voltage versions and in a variable version (programmable over the range of 1.2 V to 5.5 V).

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

TA – Free-Air Temperature – °C

15

22

TPS76933

GROUND CURRENT

vs

FREE-AIR TEMPERATURE

Ground Current – Aµ

VI = 4.3 V
CO = 4.7 µF

–40 0–20 20 140–60 40 80 100 12060

21

20

19

18

17

16

IO = 0 mA

IO = 100 mA

TPS76901, TPS76912, TPS76915, TPS76918, TPS76925
TPS76927, TPS76928, TPS76930, TPS76933, TPS76950
ULTRALOW-POWER 100-mA LOW-DROPOUT LINEAR REGULATORS

SLVS203D – JUNE 1999 – REVISED APRIL 2000

2

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

AVAILABLE OPTIONS

T

J

VOLTAGE PACKAGE PART NUMBER SYMBOL

Variable

1.2V to 5.5V

TPS76901DBVT†TPS76901DBVR

‡

PCFI

1.2 V TPS76912DBVT†TPS76912DBVR

‡

PCGI

1.5 V TPS76915DBVT†TPS76915DBVR

‡

PCHI

1.8 V

TPS76918DBVT†TPS76918DBVR

‡

PCII

–40°C to 125°C

2.5 V

SOT-23

TPS76925DBVT†TPS76925DBVR

‡

PCJI

2.7 V

(DBV)

TPS76927DBVT†TPS76927DBVR

‡

PCKI

2.8 V TPS76928DBVT†TPS76928DBVR

‡

PCLI

3.0 V TPS76930DBVT†TPS76930DBVR

‡

PCMI

3.3 V TPS76933DBVT†TPS76933DBVR

‡

PCNI

5.0 V TPS76950DBVT†TPS76950DBVR

‡

PCOI

†

The DBVT indicates tape and reel of 250 parts.

‡

The DBVR indicates tape and reel of 3000 parts.

functional block diagram

TPS76901

OUT

IN

FB

GND

EN

V

REF

TPS76912/15/18/25/27/28/30/33/50

OUT

IN

GND

EN

V

REF

Current Limit

/ Thermal

Protection

Current Limit

/ Thermal

Protection

TPS76901, TPS76912, TPS76915, TPS76918, TPS76925
TPS76927, TPS76928, TPS76930, TPS76933, TPS76950

ULTRALOW-POWER 100-mA LOW-DROPOUT LINEAR REGULATORS

SLVS203D – JUNE 1999 – REVISED APRIL 2000

3

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

Terminal Functions

TERMINAL

NAME NO.

I/O

DESCRIPTION

GND 2 Ground
EN 3 I Enable input
FB 4 I Feedback voltage (TPS76901 only)
IN 1 I Input supply voltage
NC 4 No connection (Fixed options only)
OUT 5 O Regulated output voltage

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

Ĕ

Input voltage range

(see Note 1)

–0.3 V to 13.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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 Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

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

recommended operating conditions

MIN NOM MAX UNIT

Input voltage, VI (see Note 2) 2.7 10 V
Output voltage range, V

O

1.2 5.5 V
Continuous output current, IO (see Note 3) 0 100 mA
Operating junction temperature, T

J

–40 125 °C

NOTES: 2. To calculate the minimum input voltage for your maximum output current, use the following formula:

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

3. Continuous output 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.

TPS76901, TPS76912, TPS76915, TPS76918, TPS76925
TPS76927, TPS76928, TPS76930, TPS76933, TPS76950
ULTRALOW-POWER 100-mA LOW-DROPOUT LINEAR REGULATORS

SLVS203D – JUNE 1999 – 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

O

= 100 mA, EN = 0 V, C

O

= 4.7 µF (unless otherwise noted)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

1.2 V ≤ VO ≤ 5.5 V, TJ = 25°C V

O

TPS76901

1.2 V ≤ VO ≤ 5.5 V, TJ = –40°C to 125°C 0.97V

O

1.03V

O

TJ = 25°C, 2.7 V < VIN < 10 V 1.224

TPS76912

TJ = –40°C to 125°C, 2.7 V < VIN < 10 V 1.187 1.261
TJ = 25°C, 2.7 V < VIN < 10 V 1.5

TPS76915

TJ = –40°C to 125°C, 2.7 V < VIN < 10 V 1.455 1.545
TJ = 25°C, 2.8 V < VIN < 10 V 1.8

TPS76918

TJ = –40°C to 125°C, 2.8 V < VIN < 10 V 1.746 1.854
TJ = 25°C, 3.5 V < VIN < 10 V 2.5

Output voltage (10 µA to 100 mA

TPS76925

TJ = –40°C to 125°C, 3.5 V < VIN < 10 V 2.425 2.575

g( µ

load) (see Note 4)

TJ = 25°C, 3.7 V < VIN < 10 V 2.7

V

TPS76927

TJ = –40°C to 125°C, 3.7 V < VIN < 10 V 2.619 2.781
TJ = 25°C, 3.8 V < VIN < 10 V 2.8

TPS76928

TJ = –40°C to 125°C, 3.8 V < VIN < 10 V 2.716 2.884
TJ = 25°C, 4.0 V < VIN < 10 V 3.0

TPS76930

TJ = –40°C to 125°C, 4.0 V < VIN < 10 V 2.910 3.090
TJ = 25°C, 4.3 V < VIN < 10 V 3.3

TPS76933

TJ = –40°C to 125°C, 4.3 V < VIN < 10 V 3.201 3.399
TJ = 25°C, 6.0 V < VIN < 10 V 5.0

TPS76950

TJ = –40°C to 125°C, 6.0 V < VIN < 10 V 4.850 5.150

Quiescent current (GND current)

EN = 0V, 0 mA < IO < 100 mA,
TJ = 25°C

17

()

(See Note 4 and Note 5)

EN = 0V, IO = 100 mA,
TJ = –40°C to 125°C

28

µ

A

Load regulation

EN = 0V, IO = 0 to 100 mA,
TJ = 25°C

12 mV

p

VO + 1 V < VI ≤ 10 V, TJ = 25°C,
See Note 4

0.04

Output voltage line regulation (∆VO/VO) (See Note 5)

VO + 1 V < VI ≤ 10 V,
TJ = –40°C to 125°C, See Note 4

0.1

%/V

Output noise voltage

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

190 µVrms

Output current limit VO = 0 V, See Note 4 350 750 mA

EN = VI, 2.7 < VI < 10 V 1 µA

Standby current

TJ = –40°C to 125°C 2 µA

NOTES: 4. Minimum IN operating voltage is 2.7 V or V

O(typ)

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

10 µA, maximum output current 100 mA.

5. If VO≤ 1.8 V then V

imin

= 2.7 V, V

imax

= 10 V:

Line Reg. (mV)

+ǒ%ńVǓ

V

O

ǒ

V

imax

*

2.7 V

Ǔ

100

1000

If VO ≥ 2.5 V then V

imin

= VO + 1 V, V

imax

= 10 V:

Line Reg. (mV)

+ǒ%ńVǓ

V

O

ǒ

V

imax

*ǒVO)

1V

Ǔ

Ǔ

100

1000

TPS76901, TPS76912, TPS76915, TPS76918, TPS76925
TPS76927, TPS76928, TPS76930, TPS76933, TPS76950

ULTRALOW-POWER 100-mA LOW-DROPOUT LINEAR REGULATORS

SLVS203D – JUNE 1999 – 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

O

= 100 mA, EN = 0 V, C

O

= 4.7 µF (unless otherwise noted) (continued)

PARAMETER TEST CONDITIONS

MIN TYP MAX UNIT

FB input current FB = 1.224 V (TPS76901) –1 1 µA
High level enable input voltage 2.7 V < VI < 10 V 1.7 V
Low level enable input voltage 2.7 V < VI < 10 V 0.9 V

Power supply ripple rejection

f = 1 kHz, CO = 10 µF,
TJ = 25°C, See Note 4

60 dB

p

EN = 0 V –1 0 1 µA

Input current (EN)

EN = V

I

–1 1 µA
IO = 50 mA, TJ = 25°C 60
IO = 50 mA, TJ = –40°C to 125°C 125

TPS76928

IO = 100 mA, TJ = 25°C 122
IO = 100 mA, TJ = –40°C to 125°C 245
IO = 50 mA, TJ = 25°C 57
IO = 50 mA, TJ = –40°C to 125°C 115

TPS76930

IO = 100 mA, TJ = 25°C 115

p

IO = 100 mA, TJ = –40°C to 125°C 230

Dropout voltage (See Note 6)

IO = 50 mA, TJ = 25°C 48

mV

IO = 50 mA, TJ = –40°C to 125°C 100

TPS76933

IO = 100 mA, TJ = 25°C 98
IO = 100 mA, TJ = –40°C to 125°C 200
IO = 50 mA, TJ = 25°C 35
IO = 50 mA, TJ = –40°C to 125°C 85

TPS76950

IO = 100 mA, TJ = 25°C 71
IO = 100 mA, TJ = –40°C to 125°C 170

NOTES: 4. Minimum IN operating voltage is 2.7 V or V

O(typ)

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

10 µA, maximum output current 100 mA.

6. IN voltage equals VO(Typ) – 100mV; TPS76901 output voltage set to 3.3V nominal with external resistor divider. TPS76912,
TPS76915, TPS76918, TPS76925, and TPS76927 dropout voltage limited by input voltage range limitations.

TYPICAL CHARACTERISTICS

Table of Graphs

FIGURE

p

vs Output current 1, 2, 3

VOOutput voltage

vs Free-air temperature 4, 5, 6
Ground current vs Free-air temperature 7
Output spectral noise density vs Frequency 8

Z

o

Output impedance vs Frequency 9

V

DO

Dropout voltage vs Free-air temperature 10
Ripple rejection vs Frequency 11
LDO startup time 12
Line transient response 13, 15
Load transient response 14, 16

vs Output current 17, 19

Equivalent series resistance (ESR)

vs Added ceramic capacitance 18, 20

TPS76901, TPS76912, TPS76915, TPS76918, TPS76925
TPS76927, TPS76928, TPS76930, TPS76933, TPS76950
ULTRALOW-POWER 100-mA LOW-DROPOUT LINEAR REGULATORS

SLVS203D – JUNE 1999 – REVISED APRIL 2000

6

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

TYPICAL CHARACTERISTICS

Figure 1

100

TPS76925

OUTPUT VOLTAGE

vs

OUTPUT CURRENT

2.496

2.488

2.482
20 60

2.494

2.490

2.486

40 80

2.498

0

– Output Voltage – V
V

O

2.492

2.484

VI = 3.5 V
CO = 4.7 µF
TA = 25° C

IO – Output Current – mA

Figure 2

IO – Output Current – mA

1.494

1.488

1.484
20 60

1.492

1.490

1.486

40 80

1.498

0 100

– Output Voltage – V
V

O

TPS76915

OUTPUT VOLTAGE

vs

OUTPUT CURRENT

1.496

VI = 2.7 V
CO = 4.7 µF
TA = 25° C

Figure 3

IO – Output Current – mA

TPS76933

OUTPUT VOLTAGE

vs

OUTPUT CURRENT

20 6040 800 100

– Output Voltage – V
V

O

3.280

3.274

3.270

3.278

3.276

3.272

3.284

3.282

VI = 4.3 V
CO = 4.7 µF
TA = 25° C

Figure 4

TA – Free-Air Temperature – °C

TPS76915

OUTPUT VOLTAGE

vs

FREE-AIR TEMPERATURE

1.486

1.480
–40 0

1.488

1.484

–20 20 140

1.496

–60

40 80

1.492

1.494

100 120

– Output Voltage – V
V

O

1.490

1.482

60

IO = 1 mA

VI = 2.7 V
CO = 4.7 µF

IO = 100 mA

TPS76901, TPS76912, TPS76915, TPS76918, TPS76925
TPS76927, TPS76928, TPS76930, TPS76933, TPS76950

ULTRALOW-POWER 100-mA LOW-DROPOUT LINEAR REGULATORS

SLVS203D – JUNE 1999 – REVISED APRIL 2000

7

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

TYPICAL CHARACTERISTICS

Figure 5

TA – Free-Air Temperature – °C

TPS76925

OUTPUT VOLTAGE

vs

FREE-AIR TEMPERATURE

2.476

2.492

2.486

2.496

– Output Voltage – V
V

O

2.478

2.490

2.480

2.494

2.482

–40 0–20 20 140–60 40 80 100 12060

IO = 1 mA

IO = 100 mA

VI = 3.5 V
CO = 4.7 µF

2.488

2.484

Figure 6

TA – Free-Air Temperature – °C

TPS76933

OUTPUT VOLTAGE

vs

FREE-AIR TEMPERATURE

3.265

3.260

3.255

3.270

3.285

3.275

3.280

– Output Voltage – V
V

O

–40 0–20 20 140–60 40 80 100 12060

IO = 100 mA

VI = 4.3 V
CO = 4.7 µF

IO = 1 mA

Figure 7

TA – Free-Air Temperature – °C

15

22

TPS76933

GROUND CURRENT

vs

FREE-AIR TEMPERATURE

Ground Current – Aµ

VI = 4.3 V
CO = 4.7 µF

–40 0–20 20 140–60 40 80 100 12060

21

20

19

18

17

16

IO = 0 mA

IO = 100 mA

Figure 8

f – Frequency – Hz

1k 10k 100k

CO = 10 µF
IO = 1 mA

VI = 4.3 V

0

1.6

1

2

0.2

1.4

0.4

1.8

0.6

1.2

0.8

100

CO = 4.7 µF
IO = 1 mA

CO = 4.7 µF
IO = 100 mA

CO = 10 µF
IO = 100 mA

V HzOutput Spectral Noise Density – µ

TPS76933

OUTPUT SPECTRAL NOISE DENSITY

vs

FREQUENCY

TPS76901, TPS76912, TPS76915, TPS76918, TPS76925
TPS76927, TPS76928, TPS76930, TPS76933, TPS76950
ULTRALOW-POWER 100-mA LOW-DROPOUT LINEAR REGULATORS

SLVS203D – JUNE 1999 – REVISED APRIL 2000

8

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

TYPICAL CHARACTERISTICS

Figure 9

100 1 M10 1 k

f – Frequency – Hz

10 k

– Output Impedance –Z

o

Ω

OUTPUT IMPEDANCE

vs

FREQUENCY

0

1.6

1

2

0.2

1.4

0.4

1.8

0.6

1.2

0.8

100 k

VI = 4.3 V
CO = 4.7 µF
ESR = 0.3 Ω
TA = 25° C

IO = 100 mA

IO = 1 mA

Figure 10

TA – Free-Air Temperature – °C

1

1000

10

100

VI = 3.2 V
CO = 4.7 µF

– Dropout Voltage – mV
V

DO

TPS76933

DROPOUT VOLTAGE

vs

FREE-AIR TEMPERATURE

–40 0–20 20 140–60 40 80 100 12060

IO = 10 mA

IO = 100 mA

Figure 11

10 M1 M100 k10 k1 k100

Ripple Rejection – dB

f – Frequency – Hz

RIPPLE REJECTION

vs

FREQUENCY

100

60
50

40
30
20
10

0

–10

10

TPS76933

VI = 4.3 V
CO = 4.7 µF
ESR = 0.3 Ω

70

80

90

IO = 100 mA

IO = 1 mA

Figure 12

LDO STARTUP TIME

t – Time – µs

0604020 80 100 140120 160 180 200

V

O

EN

TPS76901, TPS76912, TPS76915, TPS76918, TPS76925
TPS76927, TPS76928, TPS76930, TPS76933, TPS76950

ULTRALOW-POWER 100-mA LOW-DROPOUT LINEAR REGULATORS

SLVS203D – JUNE 1999 – REVISED APRIL 2000

9

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

TYPICAL CHARACTERISTICS

Figure 13

3.7

TPS76915

LINE TRANSIENT RESPONSE

V

O

t – Time – µs

0604020 80 100 140120 160 180 200

– Output Voltage – mV

IL = 10 mA
CO = 4.7 µF
ESR = 0.3 Ω

V

I

– Input Voltage – V

2.7

10

0

–10

Figure 14

t – Time – µs

TPS76915

LOAD TRANSIENT RESPONSE

0

0

0604020 80 100 140120 160 180 200

Current Load – mA

100

VI = 2.7 V
CO = 10 µF
ESR = 0.3 Ω

–200

–400

V

O

Output Voltage – mV

∆

– Change In

Figure 15

TPS76933

LINE TRANSIENT RESPONSE

t – Time – µs

5.3

V

O

0604020 80 100 140120 160 180

– Output Voltage – mVV

I

– Input Voltage – V

IL = 10 mA
CO = 4.7 µF
ESR = 0.3 Ω

4.3

10

0

–10

Figure 16

t – Time – µs

TPS76933

LOAD TRANSIENT RESPONSE

0

0604020 80 100 140120 160 180

Current Load – mA

100

VI = 4.3 V
CO = 4.7 µF
ESR = 0.3 Ω

100

0

–100

V

O

Output Voltage – mV

∆

– Change In

TPS76901, TPS76912, TPS76915, TPS76918, TPS76925
TPS76927, TPS76928, TPS76930, TPS76933, TPS76950
ULTRALOW-POWER 100-mA LOW-DROPOUT LINEAR REGULATORS

SLVS203D – JUNE 1999 – REVISED APRIL 2000

10

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

TYPICAL CHARACTERISTICS

Figure 17

1

0 25 50 75 100

100

IO – Output Current – mA

ESR – Equivalent Series Resistance – Ω

10

Region of Instability

VIN = 4.3 V
CO = 4.7 µF

3.3 V LDO

TPS76933

TYPICAL REGIONS OF STABILITY

EQUIVALENT SERIES RESISTANCE (ESR)

†

vs

OUTPUT CURRENT

0.1

Region of Stability

Figure 18

0 0.1 0.2 0.3 0.4 0.5

Added Ceramic Capacitance – µF

0.6 0.7 0.8 0.9 1

1

100

ESR – Equivalent Series Resistance – Ω

10

Region of Instability

Region of Stability

VIN = 4.3 V
CO = 4.7 µF
IL = 100 mA

TPS76933

TYPICAL REGIONS OF STABILITY

EQUIVALENT SERIES RESISTANCE (ESR)

vs

ADDED CERAMIC CAPACITANCE

Figure 19

IO – Output Current – mA

1

0 25 50 75 100

100

ESR – Equivalent Series Resistance – Ω

10

VIN = 4.3 V
CO = 10 µF

3.3 V LDO

TPS76933

TYPICAL REGIONS OF STABILITY

EQUIVALENT SERIES RESISTANCE (ESR)

†

vs

OUTPUT CURRENT

Region of Instability

Region of Stability

0.1

Figure 20

Added Ceramic Capacitance – µF

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1

1

100

ESR – Equivalent Series Resistance – Ω

10

Region of Instability

Region of Stability

VIN = 4.3 V
CO = 10 µF
IL = 100 mA

TPS76933

TYPICAL REGIONS OF STABILITY

EQUIVALENT SERIES RESISTANCE (ESR)

vs

ADDED CERAMIC CAPACITANCE

TPS76901, TPS76912, TPS76915, TPS76918, TPS76925
TPS76927, TPS76928, TPS76930, TPS76933, TPS76950

ULTRALOW-POWER 100-mA LOW-DROPOUT LINEAR REGULATORS

SLVS203D – JUNE 1999 – REVISED APRIL 2000

11

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

APPLICATION INFORMATION

The TPS769xx family of low-dropout (LDO) regulators have been optimized for use in battery-operated
equipment. They feature extremely low dropout voltages, low quiescent current (17 µA nominally), and enable
inputs to reduce supply currents to 1 µA when the regulators are turned off.

device operation

The TPS769xx 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
and, unlike a PNP transistor, it does not require increased drive current as output current increases. Supply
current in the TPS769xx 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 350 mA; 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 approximately 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 gate diode
that conducts reverse current when the input voltage level drops below the output voltage level.

A voltage of 1.7 V or greater on the EN

input will disable the TPS769xx internal circuitry, reducing the supply
current to 1µA. A voltage of less than 0.9 V on the EN input will enable the TPS769xx and will enable normal
operation to resume. The EN input does not include any deliberate hysteresis, and it exhibits an actual switching
threshold of approximately 1.5 V.

A typical application circuit is shown in Figure 21.

C1

1 µF

†

TPS76912, TPS76915, TPS76918, TPS76925, TPS76927, TPS76928,
TPS76930, TPS76933, TPS76950 (fixed-voltage options).

NC/FB

OUT

1

3

IN

EN

GND

2

4

5

V

I

ESR = 0.2 Ω

V

O

4.7 µF

+

TPS769xx

†

Figure 21. Typical Application Circuit

TPS76901, TPS76912, TPS76915, TPS76918, TPS76925
TPS76927, TPS76928, TPS76930, TPS76933, TPS76950
ULTRALOW-POWER 100-mA LOW-DROPOUT LINEAR REGULATORS

SLVS203D – JUNE 1999 – REVISED APRIL 2000

12

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

APPLICATION INFORMATION

external capacitor requirements

Although not required, a 0.047-µF or larger ceramic input bypass capacitor, connected between IN and GND
and located close to the TPS769xx, 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 TPS769xx requires an output capacitor connected between OUT and GND
to stabilize the internal control loop. The minimum recommended capacitance is 4.7 µF. The ESR (equivalent
series resistance) of the capacitor should be between 0.2 Ω and 10 Ω. to ensure stability . Capacitor values larger
than 4.7 µF are acceptable, and allow the use of smaller ESR values. Capacitances less than 4.7 µF are not
recommended because they require careful selection of ESR to ensure stability. 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 may have very small equivalent series resistances and may thus require the addition of a low value
series resistor to ensure stability.

CAP ACIT OR SELECTION

PART NO. MFR. VALUE MAX ESR

†

SIZE (H × L × W)

†

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. Contact manufacturer for minimum ESR values.

TPS76901, TPS76912, TPS76915, TPS76918, TPS76925
TPS76927, TPS76928, TPS76930, TPS76933, TPS76950

ULTRALOW-POWER 100-mA LOW-DROPOUT LINEAR REGULATORS

SLVS203D – JUNE 1999 – REVISED APRIL 2000

13

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

APPLICATION INFORMATION

output voltage programming

The output voltage of the TPS76901 adjustable regulator is programmed using an external resistor divider as
shown in Figure 22. The output voltage is calculated using:

VO+

V

ref

ǒ1

)

R1
R2

Ǔ

(1)

Where:

V

ref

= 1.224 V typ (the internal reference voltage)

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

V

O

V

ref

*

1

Ǔ

R2

(2)

V

O

V

I

OUT

FB

R2

GND

EN

IN

≤0.9 V

≥1.7 V

TPS76901

1 µF

OUTPUT

VOLTAGE

(V)

R1 R2

2.5

3.3

3.6

4.0

5.0

174
287
324
383
523

169
169
169
169
169

OUTPUT VOLTAGE

PROGRAMMING GUIDE

DIVIDER RESISTANCE

(kΩ)

‡

‡

1% values shown.

3

1

4

2

R1

5

ESR = 0.2 Ω

4.7 µF

Figure 22. TPS76901 Adjustable LDO Regulator Programming

TPS76901, TPS76912, TPS76915, TPS76918, TPS76925
TPS76927, TPS76928, TPS76930, TPS76933, TPS76950
ULTRALOW-POWER 100-mA LOW-DROPOUT LINEAR REGULATORS

SLVS203D – JUNE 1999 – REVISED APRIL 2000

14

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

APPLICATION INFORMATION

power dissipation and junction temperature

Specified regulator operation is assured to a junction temperature of 125°C; the maximum junction temperature
should be restricted to 125°C under normal operating conditions. This restriction limits the power dissipation
the regulator can handle in any given application. T o ensure the junction temperature is within acceptable limits,
calculate the maximum allowable dissipation, P

D(max)

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

or equal to P

D(max)

.

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

P

D(max)

+

TJmax*T

A

R

q

JA

Where:

TJmax is the maximum allowable junction temperature

R

θJA

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

SOT23.
T

A

is the ambient temperature.

The regulator dissipation is calculated using:

PD+ǒVI*

V

O

Ǔ

I

O

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

regulator protection

The TPS769xx PMOS-pass transistor has a built-in back diode that conducts reverse current 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 operation is anticipated, external limiting might
be appropriate.

The TPS769xx features internal current limiting and thermal protection. During normal operation, the TPS769xx
limits output current to approximately 350 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 approximately 165°C, thermal-protection circuitry shuts it down. Once the device has cooled down to
below approximately 140°C, regulator operation resumes.

TPS76901, TPS76912, TPS76915, TPS76918, TPS76925
TPS76927, TPS76928, TPS76930, TPS76933, TPS76950

ULTRALOW-POWER 100-mA LOW-DROPOUT LINEAR REGULATORS

SLVS203D – JUNE 1999 – REVISED APRIL 2000

15

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

45

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.

IMPORTANT NOTICE

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pertaining to warranty, patent infringement, and limitation of liability.

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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

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