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FEATURES

DESCRIPTION

APPLICATIONS

Frequency (Hz)

1

2

3

4

5

DCQ PACKAGE

SOT223-6

(TOP VIEW)

NR/FB

OUT

GND

IN

EN

0

10

20

30

40

50

60

70

80

1

10

100

1 k

10 k

100 k 1 M

10 M

TPS79530

RIPPLE REJECTION

vs

FREQUENCY

0

0.1

0.2

0.3

0.4

0.5

100

1 k

10 k

100 k

TPS79530

OUTPUT SPECTRAL NOISE DENSITY

vs

FREQUENCY

Frequency (Hz)

6

GND

TPS79501, TPS79516

TPS79518, TPS79525

TPS79530, TPS79533

SLVS350C – OCTOBER 2002 – REVISED JANUARY 2005

ULTRALOW-NOISE, HIGH PSRR, FAST RF 500-mA

LOW-DROPOUT LINEAR REGULATORS

•

500-mA Low-Dropout Regulator With Enable

The

TPS795xx

family

of

low-dropout

(LDO)

low-power linear voltage regulators features high

•

Available in 1.6-V, 1.8-V, 2.5-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 (50 dB at 10 kHz)

responses in a small outline, SOT223-6, package.

•

Each device in the family is stable with a small 1-µF

ceramic capacitor on the output. The family uses an

•

Fast Start-Up Time (50 µs)

advanced, proprietary BiCMOS fabrication process to

•

Stable With a 1-µF Ceramic Capacitor

yield extremely low dropout voltages (for example,

•

Excellent Load/Line Transient Response

110 mV at 500 mA). Each device achieves fast

start-up times (approximately 50 µs with a 0.001-µF

•

Very Low Dropout Voltage (110 mV at Full

bypass capacitor) while consuming very low quiesc-

Load, TPS79530)

ent current (265 µA typical). Moreover, when the

•

6-Pin SOT223-6 Package

device is placed in standby mode, the supply current

is reduced to less than 1 µA. The TPS79530 exhibits

•

RF: VCOs, Receivers, ADCs

3.0 V output with a 0.1-µF bypass capacitor. Appli-

cations with analog components that are noise sensi-

•

Audio

tive, such as portable RF electronics, benefit from the

•

Bluetooth™, Wireless LAN

high PSRR and low noise features, as well as the fast

•

Cellular and Cordless Telephones

response time.

•

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 © 2002–2005, 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.