VIN

VEN

EN

IN

OUT

GND

1 PF

VOUT

TPS79101

BYPASS

PF

1 PF

FB

100 pF

Copyright © 2017, Texas Instruments Incorporated

VIN

VEN

EN

IN

OUT

GND

1 PF

1 PF

VOUT

TPS791

BYPASS

0.1 PF

Copyright © 2018, Texas Instruments Incorporated

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An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

TPS791

SLVS325D – MARCH 2001 – REVISED FEBRUARY 2018

TPS791

Ultralow Noise, High PSRR, Fast RF 100-mA Low-Dropout Linear Regulators

1

1 Features

1

•

100-mA Low-Dropout Regulator With EN

•

Available in 1.8-V, 3.3-V, 4.7-V, and Adj.

•

High PSRR (70 dB at 10 kHz)

•

Ultralow Noise (15 µVRMS)

•

Fast Start-Up Time (63 µs)

•

Stable With Any 1-µF Ceramic Capacitor

•

Excellent Load, Line Transient

•

Very Low Dropout Voltage (38 mV at Full Load,

TPS79147)

•

5-Pin SOT23 (DBV) Package

•

TPS792xx Provides EN Options

2 Applications

•

Powering VCOs and PLLs

•

Bluetooth and Wireless LAN

•

Portable and Battery Operated

3 Description

The TPS791 device is a low-dropout (LDO) low-

power linear voltage regulator that features high

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

fast start-up, and excellent line and load transient

responses in a small outline, SOT23 package. The

device is stable, with a small 1-µF ceramic capacitor

on the output. The TPS791 uses an advanced,

proprietary BiCMOS fabrication process to yield

extremely low dropout voltages (for example, 38 mV

at 100 mA, TPS79147). This device achieves fast

start-up times (approximately 63 µs with a 0.001-µF

bypass

capacitor)

while

consuming

very

low

quiescent current (170 µA typical). Moreover, when

the device is placed in standby mode, the supply

current is reduced to less than 1 µA. The TPS79118

exhibits approximately 15 µVRMS of output voltage

noise with a 0.1-µF bypass capacitor. Applications

with analog components that are noise sensitive,

such as portable RF electronics, benefit from the high

PSRR and low noise features as well as the fast

response time.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

TPS791

SOT23 (5)

2.90 mm × 1.60 mm

SOT23 (6)

2.90 mm × 1.60 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

Simplified Schematic: Fixed Output

Simplified Schematic: Adjustable Output