LM3207TL National Semiconductor, LM3207TL Datasheet

LM3207TL

Manufacturer Part Number

LM3207TL

Description

Manufacturer

National Semiconductor

Datasheets

1.LM3207TL.pdf (24 pages)

2.LM3207TL.pdf (19 pages)

Specifications of LM3207TL

Date_code

05+

Packing_info

2520

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

LM3207TLX

Manufacturer:

NSC

Quantity:

2 785

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LM3207

650mA Miniature, Adjustable, Step-Down DC-DC Converter

for RF Power Amplifiers with Integrated Vref LDO

General Description

The LM3207 is a DC-DC converter optimized for powering

WCDMA / CDMA RF power amplifiers (PAs) from a single

Lithium-Ion cell; however they may be used in many other

applications. It steps down an input voltage from 2.7V to 5.5V

to a variable output voltage from 0.8V(typ.) to 3.6V(typ.). Out-

put voltage is set using a V

power levels and efficiency of the RF PA.

The LM3207 also provides a regulated reference voltage

(Vref) required by linear RF power amplifiers through an in-

tegrated LDO that has a maximum Iref up to 10 mA. See

Ordering Information table on page 2 for Voltage Options.

The LM3207 is available in a 9-pin lead free micro SMD pack-

age. High switching frequency (2MHz) allows use of surface-

mount components. Only four small external surface-mount

components are required, an inductor and three ceramic ca-

pacitors.

Typical Application

CON

analog input for controlling

201653

FIGURE 1. LM3207 Typical Application

Features

■

Applications

■

2MHz (typ.) PWM Switching Frequency

Operates from a single Li-Ion cell (2.7V to 5.5V)

Variable Output Voltage (0.8V to 3.6V)

650mA Maximum load capability

High Efficiency (95% Typ at 3.9V

from internal synchronous rectification

Integrated Vref LDO

Regulated LDO Output up to 10mA max

Fast 3uS Vref LDO On/Off Time

9-pin micro SMD Package

Current Overload Protection

Thermal Overload Protection

Cellular Phones

Hand-Held Radios

RF PC Cards

Battery Powered RF Devices

, 3.4V

20165301

OUT

www.national.com

at 400mA)

April 2007

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