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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 PACKAGE

DDPAK-5

(TOP VIEW)

2

3

4

5

EN

IN

GND

OUT

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

NR/FB

TAB

GND

TPS786xx

SLVS389G – SEPTEMBER 2002 – REVISED JULY 2006

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

LOW-DROPOUT LINEAR REGULATORS

• 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

• Ultralow Noise (48 µV

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

small 1-

µF ceramic capacitor on the output. The

• Fast Start-Up Time (50 µs)

family uses an advanced,

proprietary

BiCMOS

• Stable With a 1-µF 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

• Very Low Dropout Voltage (390 mV at Full

µs with a 0.001 µF bypass capacitor) while

Load, TPS78630)

consuming very low quiescent current (265

µA,

• 6-Pin SOT223 and 5-Pin DDPAK Package

typical). Moreover, when the device is placed in

standby mode, the supply current is reduced to less

than 1

µA. The TPS78630 exhibits approximately 48

• RF: VCOs, Receivers, ADCs

µV

0.1

µF bypass capacitor. Applications with analog

• Audio

components that are noise sensitive, such as

portable RF electronics, benefit from the high PSRR,

• Cellular and Cordless Telephones

low noise features, and the fast 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 registered 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.