UDG-11047

TPS53353

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TPS53353

SLUSAK2B – AUGUST 2011 – REVISED FEBRUARY 2015

TPS53353 High-Efficiency 20-A Synchronous Buck Converter With Eco-mode™

1 Features

2 Applications

1

•

Conversion Input Voltage Range: 1.5 V to 15 V

•

Server/Storage

•

VDD Input Voltage Range: 4.5 V to 25 V

•

Workstations and Desktops

•

92% Efficiency From 12 V to 1.5 V at 20 A

•

Telecommunications Infrastructure

•

Output Voltage Range: 0.6 V to 5.5 V

3 Description

•

5-V LDO Output

TPS53353 is a D-CAP™ mode, 20-A synchronous

•

Supports Single-Rail Input

switcher with integrated MOSFETs. It is designed for

•

Integrated Power MOSFETs With 20 A of

ease of use, low external component count, and

Continuous Output Current

space-conscious power systems.

•

Auto-Skip Eco-mode™ for Light-Load Efficiency

This device features 5.5-m

Ω / 2.2-mΩ integrated

•

< 10-

μA Shutdown Current

MOSFETs,

accurate

1%,

0.6-V

reference,

and

integrated boost switch. A sample of competitive

•

D-CAP™ Mode With Fast Transient Response

features include: a conversion input voltage range

•

Selectable Switching Frequency From 250 kHz to

from 1.5 V to 15 V, very low external component

1 MHz With External Resistor

count, D-CAP™ mode control for super fast transient,

•

Selectable Auto-Skip or PWM-Only Operation

auto-skip mode operation, internal soft-start control,

selectable frequency, and no need for compensation.

•

Built-in 1% 0.6-V Reference.

•

0.7-ms, 1.4-ms, 2.8-ms and 5.6-ms Selectable

The conversion input voltage ranges from 1.5 V to 15

V, the supply voltage range is from 4.5 V to 25 V, and

Internal Voltage Servo Soft-Start

the output voltage range is from 0.6 V to 5.5 V.

•

Integrated Boost Switch

The device is available in 5-mm × 6-mm, 22-pin QFN

•

Precharged Start-up Capability

package and is specified from –40°C to 85°C.

•

Adjustable Overcurrent Limit With Thermal

Compensation

Device Information(1)

•

Overvoltage, Undervoltage, UVLO and

PART NUMBER

PACKAGE

BODY SIZE (NOM)

Overtemperature Protection

TPS53353

LSON-CLIP (22)

6.00 mm × 5.00 mm

•

Supports All Ceramic Output Capacitors

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

•

Open-Drain Power-Good Indication

the end of the data sheet.

•

Incorporates NexFET™ Power Block Technology

•

22-Pin QFN Package With PowerPAD™

Simplified Application

1

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.