Anti-

Ringing

Gate

Control

PGND

Regulator

Error

Amplifier

PGND

Control Logic

Oscillator

Temperature

Control

VOUT

PGND

FB

LDOIN

LDOOUT

SWN

VBAT

EN

PGOOD

ENLDO

SKIPEN

GND

LBI

LBO

SWP

_

+

_

+

Backgate

Control

Control

VOUT

100 k

20 pF

_

+

GND

Backgate

Control

Error

Amplifier

LDOSENSE

_

+

_

+

GND

Low Battery

Comparator

_

+

GND

TPS61130, TPS61131, TPS61132

SLVS431C – JUNE 2002 – REVISED SEPTEMBER 2015

www.ti.com

9 Detailed Description

9.1 Overview

The TPS6113x synchronous step-up converter typically operates at a 500-kHz frequency pulse width modulation

(PWM) at moderate to heavy load currents. The converter enters Power Save mode at low load currents to

maintain a high efficiency over a wide load. The Power Save mode can also be disabled, forcing the converter to

operate at a fixed switching frequency. The device includes an additional built-in LDO which can be used to

generate a second output voltage derived from the output of the TPS6113x or an external power supply.

Additionally, TPS6113x integrated the low-battery detector circuit is used to supervise the battery voltage and to

generate an error flag when the battery voltage drops below a user-set threshold voltage.

9.2 Functional Block Diagram

10

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