TPS77901, TPS77918, TPS77925, TPS77930

250-mA LDO REGULATOR WITH INTEGRATED RESET IN A MSOP8 PACKAGE

SLVS283D – MARCH 2000 – REVISED OCTOBER 2000

1

POST OFFICE BOX 655303

Delay

and Adjustable Versions

at 250 mA (TPS77930)

Capacitor (TPS77918)

For Fixed-Output Versions

Devices for Active Low Enable

description

The TPS779xx is a low-dropout regulator with

integrated power-on reset. The device is capable

of supplying 250 mA of output current with a

dropout of 200 mV (TPS77930). Quiescent

current is 92

µA at full load dropping down to 1 µA

when the device is disabled. The device is

optimized to be stable with a wide range of output

capacitors including low ESR ceramic (10

µF) or

low capacitance (1

µF) tantalum capacitors. The

device has extremely low noise output performance (55

TPS779xx is designed to have a fast transient response for larger load current changes.

The TPS779xx is offered in 1.8-V, 2.5-V, and 3-V fixed-voltage versions and in an adjustable version

(programmable over the range of 1.5 V to 5.5 V). Output voltage tolerance is 2% over line, load, and temperature

ranges. The TPS779xx family is available in 8-pin MSOP (DGK) packages.

Because the PMOS device behaves as a low-value resistor, the dropout voltage is very low (typically 200 mV

at an output current of 250 mA for 3.3 volt option) and is directly proportional to the output current. Additionally,

since the PMOS pass element is a voltage-driven device, the quiescent current is very low and independent

of output loading (typically 92

µA over the full range of output current, 0 mA to 250 mA). These two key

specifications yield a significant improvement in operating life for battery-powered systems.

The device is enabled when the EN pin is connected to a high-level input voltage. This LDO family also features

a sleep mode; applying a TTL low signal to EN (enable) shuts down the regulator, reducing the quiescent current

to less than 1

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.

Copyright

 2000, Texas Instruments Incorporated

FB/SENSE

RESET

EN

GND

OUT

OUT

IN

IN

TPS779xx

DGK PACKAGE

(TOP VIEW)

1

2

3

4

8

7

6

5

200

150

100

0

–50 –30

–10

10

30

50

70

300

350

400

90

110

130

250

50

TPS77930

DROPOUT VOLTAGE

vs

JUNCTION TEMPERATURE

TJ – Junction Temperature – °C

IO= 0.05 A

IO= 0.15 A

IO= 0.25 A

VI = 2.9 V