BYP

FB

EN

SW

2.7V to 5.5V

0.8V to 3.6V

10 PF

4.7 PF

SGND

PGND

L

2.2 PH

LM3200

0.267V to 1.20V

BYPOUT

LM3200

www.ti.com

SNVS319C – NOVEMBER 2004 – REVISED APRIL 2013

LM3200 Miniature, Adjustable, Step-Down DC-DC Converter with Bypass Mode for RF

Power Amplifiers

Check for Samples: LM3200

1

FEATURES

DESCRIPTION

The LM3200 is a DC-DC converter optimized for

2

•

2 MHz (typ.) PWM Switching Frequency

powering RF power amplifiers (PAs) from a single

•

Operates from a Single Li-Ion Cell (2.7V to

Lithium-Ion cell. It steps down an input voltage of

5.5V)

2.7V to 5.5V to a variable output voltage of 0.8V to

•

Variable Output Voltage (0.8V to 3.6V)

3.6V. The output voltage is set using an analog input

•

300 mA Maximum Load Capability (PWM

various power levels.

Mode)

The

LM3200

offers

superior

features

and

•

500 mA Maximum Load Capability (Bypass

performance for mobile phones and similar RF PA

Mode)

applications. Fixed-frequency PWM mode minimizes

•

PWM, Forced and Automatic Bypass Mode

RF interference. Bypass mode turns on an internal

•

bypass switch to power the PA directly from the

120 mA) from Internal Synchronous

battery. LM3200 has both forced and automatic

bypass modes. Shutdown mode turns the device off

Rectification

and reduces battery consumption to 0.1 µA (typ.).

•

10-pin DSBGA Package

The LM3200 is available in a 10-pin lead free DSBGA

•

Current Overload Protection

package. A high switching frequency (2 MHz) allows

•

Thermal Overload Protection

use of tiny surface-mount components. Only three

small

external

surface-mount

components,

an

inductor and two ceramic capacitors are required.

APPLICATIONS

•

Cellular Phones

•

Hand-Held Radios

•

RF PC Cards

•

Battery Powered RF Devices

TYPICAL APPLICATION

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

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2004–2013, 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.