TPS79718

TPS79730

TPS79733

SLVS332B – MARCH 2001 – REVISED JUNE 2001

ULTRALOW-POWER SC70/SOT-323 PACKAGED 10 mA LDO

LINEAR REGULATORS WITH POWER GOOD OUTPUT

(2,15 mm x 2,3 mm)

Actual Size

1

www.ti.com

FEATURES

(TPS79733)

Temperature Range

APPLICATIONS

Microprocessors

DESCRIPTION

The TPS797xx family of low-dropout (LDO) voltage

regulators offers the benefits of low-dropout voltage and

ultralow-power operation. The device is stable with any

capacitor (

>0.47 µF). Therefore, implementations of

this device require very little board space due to the

miniaturized packaging and potentially small output

capacitor. In addition, the family includes an integrated

open drain active-high power good (PG) output.

Intended

for

use

in

microcontroller

based,

battery-powered applications, the TPS797xx family’s

low dropout and ultralow-powered operation results in

a significant increase in system battery operating life.

The small packaging minimizes consumption of board

space.

The device is enabled when the applied voltage

exceeds the minimum input voltage. The usual PNP

pass transistor has been replaced by a PMOS pass

element. Because the PMOS pass element behaves as

a low-value resistor, the dropout voltage is very low,

typically 105 mV at 10 mA of load current, and is directly

proportional to the load current. The quiescent current

is ultralow (1.2

µA typically) and is stable over the entire

range of output load current (0 mA to 10 mA). When

properly configured with a pullup resistor, the PG output

can be used to implement a power-on reset or low

battery indicator. The TPS797xx is offered in 1.8-V, 3-V,

3.3-V fixed options.

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.

Copyright

 2001, Texas Instruments Incorporated

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

DCK PACKAGE

(TOP VIEW)

1

PG

GND

NC

OUT

IN

0.50

0.75

1

1.25

1.50

1.75

2

–40

–15

10

35

60

TA – Free-Air Temperature – °C

TPS79733

GROUND CURRENT

vs

FREE-AIR TEMPERATURE

85

VI = 4.3 V

VO = 3.3 V

Co = 1 µF

IO = 10 mA