www.ti.com

FEATURES

DESCRIPTION

APPLICATIONS

1

KTT (DDPAK) PACKAGE

(TOP VIEW)

2

3

4

5

EN

IN

GND

OUT

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

Frequency (Hz)

100

10k

100k

1k

TPS79630

OUTPUT SPECTRAL NOISE DENSITY

vs

FREQUENCY

0

10

20

30

40

50

60

70

80

Frequency (Hz)

1

10k

10M

1k

TPS79630

RIPPLE REJECTION

vs

FREQUENCY

10

100

100k

1M

EN

NC

GND

NR

8

7

6

5

IN

IN

OUT

OUT

1

2

3

4

DRB PACKAGE

3 x 3 SON

(TOP VIEW)

NR/FB

1

2

3

4

5

DCQ PACKAGE

SOT223-6

(TOP VIEW)

NR/FB

OUT

GND

IN

EN

6

GND

TPS79601, TPS79618, TPS79625

TPS79628, TPS79630, TPS79633

SLVS351D – SEPTEMBER 2002 – REVISED OCTOBER 2004

ULTRALOW-NOISE, HIGH PSRR, FAST RF 1-A

LOW-DROPOUT LINEAR REGULATORS

•

1-A Low-Dropout Regulator With Enable

The

TPS796xx

family

of

low-dropout

(LDO)

low-power linear voltage regulators features high

•

Available in 1.8-V, 2.5-V, 2.8-V, 3-V, 3.3-V, and

power supply rejection ratio (PSRR), ultralow-noise,

Adjustable (1.2-V to 5.5-V)

fast start-up, and excellent line and load transient

•

High PSRR (53 dB at 10 kHz)

responses in small outline, 3 x 3 SON, SOT223-6,

•

and 5-pin DDPAK packages. Each device in the

family is stable with a small 1-µF ceramic capacitor

•

Fast Start-Up Time (50 µs)

on the output. The family uses an advanced, pro-

•

Stable With a 1-µF Ceramic Capacitor

prietary BiCMOS fabrication process to yield ex-

•

Excellent Load/Line Transient Response

tremely low dropout voltages (e.g., 250 mV at 1 A).

Each

device

achieves

fast

start-up

times

•

Very Low Dropout Voltage (250 mV at Full

(approximately 50 µs with a 0.001-µF bypass capaci-

Load, TPS79630)

tor) while consuming very low quiescent current

•

3 x 3 SON, 6-Pin SOT223-6, and

(265 µA typical). Moreover, when the device is placed

5-Pin DDPAK Packages

in standby mode, the supply current is reduced to

less than 1 µA. The TPS79630 exhibits approximately

•

RF: VCOs, Receivers, ADCs

a 0.1-µF bypass capacitor. Applications with analog

components that are noise sensitive, such as portable

•

Audio

RF electronics, benefit from the high PSRR, low

•

Bluetooth™, Wireless LAN

noise features, and the fast response time.

•

Cellular and Cordless Telephones

•

Handheld Organizers, PDAs

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.

Bluetooth is a trademark of Bluetooth SIG, Inc.

All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2002–2004, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.