PH

VIN

GND

BOOT

VSENSE

COMP

SS

C

SS

D1

VIN

VOUT

EN

TPS54332

C

I

C

BOOT

L

O

C

O

Ren1

R

O2

C

1

C

2

R

3

Ren2

R

O1

60

65

70

75

80

85

90

95

100

0

0.5

1

1.5

2

2.5

3

3.5

I -OutputCurrent- A

O

V

=2.5V

O

V =5V

I

V =12V

I

V =15V

I

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TPS54332

SLVS875C – JANUARY 2009 – REVISED NOVEMBER 2014

TPS54332 3.5-A, 28-V, 1-MHz, Step-Down DC-DC Converter With Eco-Mode™

1 Features

3 Description

The TPS54332 is a 28-V, 3.5-A non-synchronous

1

•

3.5-V to 28-V Input Voltage Range

•

Adjustable Output Voltage Down to 0.8 V

MOSFET. To increase efficiency at light loads, a

•

Integrated 80-m

Ω High-Side MOSFET Supports

pulse-skipping Eco-Mode feature is automatically

up to 3.5-A Continuous Output Current

activated. Furthermore, the 1-

μA shutdown supply

current allows the device to be used in battery-

•

High Efficiency at Light Loads With a Pulse-

powered applications. Current mode control with

Skipping Eco-Mode™

internal slope compensation simplifies the external

•

Fixed 1-MHz Switching Frequency

compensation calculations and reduces component

•

Typical 1-

μA Shutdown Quiescent Current

count while allowing the use of ceramic output

capacitors. A resistor divider programs the hysteresis

•

Adjustable Slow-Start Limits Inrush Currents

of the input undervoltage lockout. An overvoltage

•

Programmable UVLO Threshold

transient protection circuit limits voltage overshoots

•

Overvoltage Transient Protection

during start-up and transient conditions. A cycle-by-

cycle current limit scheme, frequency foldback and

•

Cycle-by-Cycle Current Limit, Frequency Foldback

thermal shutdown protect the device and the load in

and Thermal Shutdown Protection

the event of an overload condition. The TPS54332 is

•

Available in Thermally Enhanced 8-Pin SOIC

available in an 8-pin SOIC PowerPAD™ package.

PowerPAD™ Package

•

Supported by WEBENCH™ Tool

Device Information(1)

(http://www.ti.com/lsds/ti/analog/webench/overvie

PART NUMBER

PACKAGE

BODY SIZE (NOM)

w.page)

TPS54332

SO PowerPAD (8)

4.90 mm × 3.90 mm

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

2 Applications

the end of the datasheet.

•

Consumer Applications such as Set-Top Boxes,

CPE Equipment, LCD Displays, Peripherals, and

Battery Chargers

•

Industrial and Car Audio Power Supplies

•

5-V, 12-V and 24-V Distributed Power Systems

Simplified Schematic

Efficiency

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.