Falling

Edge

Deglitch

Enable

Comparator

1.2 V

VIN

2.95 V

Hysteresis: 0.03

V

2.5 ms

Falling

and

Rising

Edge

Deglitch

2.5 ms

VIN UVLO

Comparator

Hysteresis: 0.16

V

Internal/External

Slow-start

(Internal Slow-start Time = 3.35 ms

Reference

VREF = 0.891 V

−

+

Error

Amplifier

Thermal

Shutdown

150°C

SHUTDOWN

SS_DIS

PWM

Comparator

OSC

Leading

Edge

Blanking

100 ns

R

Q

S

Adaptive Dead-Time

and

Control Logic

SHUTDOWN

30 mW

VIN

REG

VBIAS

VIN

BOOT

VIN

PH

PGND

PWRGD

Falling

Edge

Deglitch

35 ms

VSENSE

SHUTDOWN

Hysteresis: 0.03 Vref

Powergood

Comparator

AGND

VBIAS

ILIM

Comparator

3 − 6 V

SYNC

RT

COMP

VSENSE

SS/ENA

TPS54610

30 mW

TPS54310

www.ti.com

SLVS412E – DECEMBER 2001 – REVISED DECEMBER 2014

8 Detailed Description

8.1 Overview

As a member of the SWIFT family of dc/dc regulators, the TPS54310 low-input-voltage high- output-current

synchronous-buck PWM converter integrates all required active components. Included on the substrate with the

listed features are a true, high performance, voltage error amplifier that provides high performance under

transient conditions; an undervoltage-lockout circuit to prevent start-up until the input voltage reaches 3 V; an

internally and externally set slow-start circuit to limit in-rush currents; and a power good output useful for

processor/logic reset, fault signaling, and supply sequencing.

8.2 Functional Block Diagram

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9

Product Folder Links: TPS54310