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FEATURES

DESCRIPTION

APPLICATIONS

1

2

3

4

5

6

GND

DCQ PACKAGE

SOT223-6

(TOP VIEW)

NR/FB

OUT

GND

IN

EN

1

KTT (DDPAK) PACKAGE

(TOP VIEW)

2

3

4

5

EN

IN

GND

OUT

NR/FB

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

3mm x 3mm SON

(TOP VIEW)

TPS796xx

SLVS351I – SEPTEMBER 2002 – REVISED MAY 2006

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

LOW-DROPOUT LINEAR REGULATORS

•

1A Low-Dropout Regulator With Enable

The

TPS796xx

family

of

low-dropout

(LDO)

low-power linear voltage regulators features high

•

Available in Fixed and Adjustable (1.2V to

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

5.5V) Versions

fast start-up, and excellent line and load transient

•

High PSRR (53dB at 10kHz)

responses in small outline, 3

× 3 SON, SOT223-6,

•

Ultralow-Noise (40

µV

and DDPAK-5 packages. Each device in the family is

stable with a small 1

µF ceramic capacitor on the

•

Fast Start-Up Time (50

µs)

output. The family uses an advanced, proprietary

•

Stable With a 1

µF Ceramic Capacitor

BiCMOS fabrication process to yield extremely low

•

Excellent Load/Line Transient Response

dropout voltages (e.g., 250mV at 1A). Each device

achieves fast start-up times (approximately 50

µs with

•

Very Low Dropout Voltage (250mV at Full

a 0.001

µF bypass capacitor) while consuming very

Load, TPS79630)

low quiescent current (265

µA typical). Moreover,

•

3

× 3 SON, SOT223-6, and

when the device is placed in standby mode, the

DDPAK-5 Packages

supply current is reduced to less than 1

µA. The

TPS79630 exhibits approximately 40

µV

voltage noise at 3.0V output, with a 0.1

µF bypass

•

RF: VCOs, Receivers, ADCs

capacitor. Applications with analog components that

are noise sensitive, such as portable RF electronics,

•

Audio

benefit from the high PSRR, low noise features, and

•

Bluetooth™, Wireless LAN

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 © 2002–2006, 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.