1

FEATURES

DESCRIPTION

APPLICATIONS

PVIN

AVIN

PGND

AGND

FB

VCON

EN

SW

V

2.5Vto6.0V

IN

3.3

H

m

4.7

F

m

10

F

m

V

=2.5xVCON

OUT

1.3Vto3.09V

TPS62700, TPS62701

2 MHz 650 mA Step Down Converter for RF Power Amplifiers in

Tiny 8-pin WCSP Package

• High-Efficiency Step-Down Converter

• Output Current up to 650 mA

The

TPS6270x

device

is

a

high-efficiency

synchronous step-down DC-DC converter optimized

• V

for RF power-amplifier (PA) applications. It provides

• 2.0-MHz Fixed-Frequency Operation

up to 650 mA of output current from a single Li-Ion

• Clock Dithering (TPS62701)

cell.

• Dynamic Voltage Control With External

The device converts input voltages from 2.5 to 6.0 V

Reference (1.3 V to 3.09 V)

down to an output voltage set by an external analog

reference voltage applied to the pin VCON. The

• Fast Output-Voltage Settling (1.3 V to 3.09 V in

output voltage follows the external reference by an

20

µs)

internal gain of 2.5 within the limits of 1.3 V to 3.09 V.

• Soft Start

This scheme adjusts the output voltage of the DC/DC

• Overload Protection

converter and therefore the output power of an

RF-PA.

• Undervoltage Lockout

• Thermal Protection

The TPS6270x operates in fixed-frequency PWM

mode at a 2.0-MHz switching frequency to minimize

• 8-Pin WCSP Package

RF interference. This converter operates with only

three small external components; an input capacitor,

inductor and output capacitor. The TPS62701 has in

• Cell Phones, Smart Phones

addition a built-in clock-dithering circuit to reduce RF

• Battery-Powered RF Amplifier

noise.

The TPS6270x is available in a tiny 8 pin lead free

WCSP package for smallest solution size.

TYPICAL APPLICATION

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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.

PRODUCTION DATA information is current as of publication date.

Copyright © 2007–2008, 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.