TPS53310

13

VIN

14

VIN

6

7

5

SW SW SW

V

IN

2.9 V to 6 V

V

IN

V

DD

2.9 V to 3.5 V

Output All MLCCs

UDG-10210

4

3

10

9

PGD

C

BST

PGD

FB

COMP

12

11

2

VDD

AGND

SYNC

1

8

EN

PS

15

PGND

16

PGND

Pad

VBST

EN

SYNC

TPS53310

www.ti.com

SLUSA68 – DECEMBER 2010

3-A Step-Down Regulator with Integrated Switcher

Check for Samples: TPS53310

1

FEATURES

LOW VOLTAGE APPLICATIONS

•

5-V Step-down Rail

2

•

>95% Maximum Efficiency

•

3.3-V Step-down Rail

•

Continuous 3-A Output Current

•

Hiccup Overcurrent Protection

DESCRIPTION

•

Supports All MLCC Output Capacitor

The TPS53310 provides a fully integrated 3-V to 5-V

•

SmoothPWM™ Auto-Skip Eco-mode™ for

VIN integrated synchronous FET converter solution

Light-Load Efficiency

•

Voltage Mode Control

Due

to

the

low

SmoothPWM™ Skip mode of operation, it enables

•

Supports Master-Slave Interleaved Operation

95.5% peak efficiency, and over 90% efficiency at

•

Synchronization up to ±20% of Nominal

loads as light as 100 mA. It requires only two 22-µF

Frequency

ceramic output capacitors for a power dense 3-A

•

Conversion Voltage Range Between 2.9 V and

solution.

6.0 V

The

TPS53310

features

a

1.1-MHz

switching

•

Soft-Stop Output Discharge During Disable

frequency, SKIP mode operation support, pre-bias

•

Adjustable Output Voltage Ranging Between

startup, internal softstart, output soft discharge,

internal VBST switch, power good, EN/input UVLO,

overcurrent,

overvoltage,

undervoltage

and

•

Undervoltage, Overvoltage and

over-temperature protections and all ceramic output

Over-Temperature Protection

capacitor support. It supports supply voltage from

•

Small 3 × 3 , 16-Pin QFN Package

2.9 V to 3.5 V and conversion voltage from 2.9 V to

6.0 V, and output voltage is adjustable from 0.6 V to

•

Open-Drain Power Good Indication

•

Internal Boot Strap Switch

The TPS53310 is available in the 3 mm × 3 mm

•

16-pin QFN package (Green RoHs compliant and Pb

with 5-V Input

free) and operates between –40°C and 85°C.

•

Supports Pre-bias Start Up

TYPICAL APPLICATION CIRCUIT

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

SmoothPWM, Eco-mode are trademarks of Texas Instruments.

PRODUCTION DATA information is current as of publication date.

Copyright © 2010, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.