1

2

3

4

5

6

GND

NR/FB

OUT

GND

IN

EN

1

KTT (DDPAK) PACKAGE

(TOP VIEW)

2

3

4

5

EN

IN

GND

OUT

NR/FB

EN

NC

GND

NR/FB

8

7

6

5

IN

IN

OUT

OUT

1

2

3

4

DRB PACKAGE

3mm x 3mm SON

(TOP VIEW)

DCQ PACKAGE

SOT223-6

(TOP VIEW)

0

10

20

30

40

50

60

70

80

Frequency (Hz)

1

10k

10M

1k

TPS78630

RIPPLE REJECTION

vs

FREQUENCY

10

100

100k

1M

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

Frequency (Hz)

100

10k

100k

1k

TPS78630

OUTPUT SPECTRAL NOISE DENSITY

vs

FREQUENCY

TPS786xx

www.ti.com

SLVS389L – SEPTEMBER 2002 – REVISED OCTOBER 2010

ULTRALOW-NOISE, HIGH-PSRR, FAST, RF, 1.5-A

LOW-DROPOUT LINEAR REGULATORS

Check for Samples: TPS786xx

1

FEATURES

DESCRIPTION

234

•

1.5-A Low-Dropout Regulator With Enable

The

TPS786xx

family

of

low-dropout

(LDO)

low-power linear voltage regulators features high

•

Available in Fixed and Adjustable (1.2-V to

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

5.5-V) Output Versions

fast start-up, and excellent line and load transient

•

High PSRR (49 dB at 10 kHz)

responses in small outline, SOT223-6 and DDPAK-5

•

packages. Each device in the family is stable, with a

small 1-mF ceramic capacitor on the output. The

•

Fast Start-Up Time (50 ms)

family

uses

an

advanced,

proprietary

BiCMOS

•

Stable With a 1-mF Ceramic Capacitor

fabrication process to yield extremely low dropout

•

Excellent Load/Line Transient Response

voltages (for example, 390 mV at 1.5 A). Each device

achieves fast start-up times (approximately 50 ms with

•

Very Low Dropout Voltage (390 mV at Full

a 0.001-mF bypass capacitor) while consuming very

Load, TPS78630)

low quiescent current (265 mA, typical). Moreover,

•

3 × 3 SON PowerPAD™, 6-Pin SOT223 and

when the device is placed in standby mode, the

5-Pin DDPAK Package

supply current is reduced to less than 1 mA. The

APPLICATIONS

voltage at 3.0-V output noise with a 0.1-mF 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

•

the fast response time.

•

Cellular and Cordless Telephones

•

Handheld Organizers, PDAs

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.

2

PowerPAD is a trademark of Texas Instruments Inc.

3

Bluetooth is a registered trademark of Bluetooth SIG, Inc.

4

All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2002–2010, 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.