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.). Output voltage is set using a V

for controlling power levels and efficiency of the RF PA.

The LM3207 also provides a regulated reference voltage(V-

ref) required by linear RF power amplifiers through an inte-

grated LDO with a nominal output voltage of 2.875V and

maximum Iref of 10 mA.

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

package. High switching frequency (2MHz) allows use of

surface-mount components. Only four small external

surface-mount components are required, an inductor and

three ceramic capacitors.

Typical Application

DS201653

FIGURE 1. LM3207 Typical Application

CON

analog input

Features

n 2MHz (typ.) PWM Switching Frequency

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

n Variable Output Voltage (0.8V to 3.6V)

n 650mA Maximum load capability

n High Efficiency (95% Typ at 3.9V

n Integrated 2.875V Vref LDO

n Regulated LDO Output up to 10mA max

n Fast 3uS Vref LDO On/Off Time

n 9-pin micro SMD Package

n Current Overload Protection

n Thermal Overload Protection

Applications

n Cellular Phones

n Hand-Held Radios

n RF PC Cards

n Battery Powered RF Devices

from internal synchronous rectification

, 3.4V

20165301

OUT

www.national.com

August 2006

at 400mA)

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