BYP

FB

EN

SW

2.7V to 5.5V

0.8V to 3.6V

C1

10 PF

C2

4.7 PF

SGND

PGND

L1

2.2 PH

LM3204

0.267V to 1.20V

BYPOUT

C4

0.1 PF

LM3204

www.ti.com

SNVS351C – JUNE 2005 – REVISED APRIL 2013

LM3204 Miniature, Adjustable, Step-Down DC-DC Converter with Bypass Mode for RF

Power Amplifiers

Check for Samples: LM3204

1

FEATURES

DESCRIPTION

The LM3204 is a DC-DC converter optimized for

2

•

2MHz (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 an adjustable output voltage of 0.8V

•

Adjustable Output Voltage (0.8V to 3.6V)

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

•

Fast Turn On Time When Enabled (50µs Typ.),

various power levels.

3GPP Compliant

The

LM3204

offers

superior

features

and

•

300mA Maximum Load Capability (PWM Mode)

performance for mobile phones and similar RF PA

•

500mA Maximum Load Capability (Bypass

applications. Fixed-frequency PWM mode minimizes

Mode)

RF interference. Bypass mode turns on an internal

•

PWM, Forced and Automatic Bypass Mode

bypass switch to power the PA directly from the

battery. LM3204 has both forced and automatic

•

bypass modes. Shutdown mode turns the device off

120mA)

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

•

10-pin DSBGA Package

The LM3204 is available in a 10-pin lead free DSBGA

•

Current Overload Protection

package. A high switching frequency (2MHz) allows

•

Thermal Overload Protection

use of tiny surface-mount components. Only three

small

external

surface-mount

components,

an

APPLICATIONS

inductor and two ceramic capacitors are required.

•

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 © 2005–2013, 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.