QFN-10

CSP-12

www.ti.com

FEATURES

DESCRIPTION

APPLICATIONS

FB

C2

10 F

m

A

L1

1 H

m

PVIN

TPS62350YZG

2.7 V .. 6 V

SW

AVIN

PGND

PGND

A

EN

VSEL

SDA

SCL

SYNC

up to 3.4 Mbips

10

20

30

40

50

60

70

80

90

100

0.1

1

10

100

1000

C1

TYPICAL APPLICATION

0

EFFICIENCY vs LOAD CURRENT

AGND

V = 3.6 V

V

= 1.35 V

LPFM/PWM Mode

I

O

TPS62350

TPS62351

SLVS540 – MAY 2006

800-mA, 3-MHz SYNCHRONOUS STEP-DOWN CONVERTER

•

88% Efficiency at 3-MHz Operation

The

TPS6235x

device

is

a

high-frequency

synchronous step-down dc-dc converter optimized

•

for battery-powered portable applications. Intended

•

3-MHz Fixed Frequency Operation

for low-power applications, the TPS6235x supports

•

Best in Class Load and Line Transient

up to 800-mA load current and allows the use of

•

Complete 1-mm Component Profile Solution

small, low cost inductors and capacitors.

•

±2.0% PWM DC Voltage Accuracy

The device is ideal for mobile phones and similar

portable applications powered by a single-cell Li-Ion

•

35-ns Minimum On-Time

battery. With an output voltage range adjustable via

•

Efficiency Optimized Power-Save Mode

(Light PFM)

low-voltage

DSPs

and

processors

core

power

•

Transient Optimized Power-Save Mode

supplies in smart-phones, PDAs, and handheld

(Fast PFM)

computers.

•

28-

µA Typical Quiescent Current

The TPS6235x operates at 3-MHz fixed switching

•

frequency

and

enters

the

efficiency

optimized

power-save mode operation at light load currents to

•

Pin-Selectable Output Voltage

maintain high efficiency over the entire load current

•

Synchronizable On the Fly to External

range.

In

the

shutdown

mode,

the

current

Clock Signal

consumption is reduced to less than 2

µA.

•

Available in a 10-Pin QFN (3 x 3 mm) and

The serial interface is compatible with Fast/Standard

12-Pin NanoFree™ (CSP) Packaging

transfers at up to 3.4 Mbps. This communication

interface is used for dynamic voltage scaling with

•

SmartReflex™ Compliant Power Supply

voltage steps down to 12.5 mV, for reprogramming

the mode of operation (Light PFM, Fast PFM or

•

Split Supply DSPs and

µP Solutions

Forced PWM) or disable/enabling the output voltage.

OMAP™, XSCALE™

•

Cell Phones, Smart-Phones

•

PDAs, Pocket PCs

•

Digital Cameras

•

Micro DC-DC Converter Modules

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.

NanoFree, SmartReflex, OMAP, PowerPAD are trademarks of Texas Instruments.

XSCALE is a trademark of Intel Corporation.

I2C is a trademark of Philips Corporation.

PRODUCT PREVIEW information concerns products in the

Copyright © 2006, Texas Instruments Incorporated

formative or design phase of development. Characteristic data and

other specifications are design goals. Texas Instruments reserves

the right to change or discontinue these products without notice.