UDG-11047

TPS53353

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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.

TPS53353

SLUSAK2C – AUGUST 2011 – REVISED FEBRUARY 2016

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

1

1 Features

1

•

Conversion Input Voltage Range: 1.5 V to 15 V

•

VDD Input Voltage Range: 4.5 V to 25 V

•

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

•

Output Voltage Range: 0.6 V to 5.5 V

•

5-V LDO Output

•

Supports Single-Rail Input

•

Integrated Power MOSFETs With 20 A of

Continuous Output Current

•

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

•

< 10-

μA Shutdown Current

•

D-CAP™ Mode With Fast Transient Response

•

Selectable Switching Frequency From 250 kHz to

1 MHz With External Resistor

•

Selectable Auto-Skip or PWM-Only Operation

•

Built-in 1% 0.6-V Reference.

•

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

Internal Voltage Servo Soft-Start

•

Integrated Boost Switch

•

Precharged Start-up Capability

•

Adjustable Overcurrent Limit With Thermal

Compensation

•

Overvoltage, Undervoltage, UVLO and

Overtemperature Protection

•

Supports All Ceramic Output Capacitors

•

Open-Drain Power-Good Indication

•

Incorporates NexFET™ Power Block Technology

•

22-Pin QFN Package With PowerPAD™

•

For SWIFT™ Power Products Documentation,

see http://www.ti.com/swift

2 Applications

•

Server/Storage

•

Workstations and Desktops

•

Telecommunications Infrastructure

3 Description

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

switcher with integrated MOSFETs. It is designed for

ease of use, low external component count, and

space-conscious power systems.

This device features 5.5-m

Ω / 2.2-mΩ integrated

MOSFETs,

accurate

1%,

0.6-V

reference,

and

integrated boost switch. A sample of competitive

features include: a conversion input voltage range

from 1.5 V to 15 V, very low external component

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

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

selectable frequency, and no need for compensation.

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

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

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

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

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

TPS53353

LSON-CLIP (22)

6.00 mm × 5.00 mm

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

the end of the data sheet.

Simplified Application