Datasheet > LM3202_06

LM3202_06

更新时间： 2024-11-20 04:20:11

品牌	Logo	应用领域
美国国家半导体 - NSC		转换器放大器射频功率放大器
页数	文件大小	规格书
16页	3814K
描述
650mA Miniature, Adjustable, Step-Down DC-DC Converter for RF Power Amplifiers

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LM3202_06 数据手册

November 2006

LM3202

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

for RF Power Amplifiers

General Description

Features

The LM3202 is a DC-DC converter optimized for powering 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 1.3V to 3.16V. Output voltage is set using a V_CONanalog

input for controlling power levels and efficiency of the RF PA.

2 MHz (typ.) PWM Switching Frequency

■

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

Variable Output Voltage (1.3V to 3.16V)

Fast Output Voltage Transient (1.3V to 3.16V in 20µs)

650mA Maximum load capability

High Efficiency (96% Typ at 3.6V_IN, 3.16V_OUTat 400mA)

from internal synchronous rectification

8-pin micro SMD Package

The LM3202 offers superior performance for mobile phones

and similar RF PA applications. Fixed-frequency PWM oper-

ation minimizes RF interference. Shutdown function turns the

device off and reduces battery consumption to 0.01 µA (typ.).

■

Current Overload Protection

The LM3202 is available in a 8-pin lead free micro SMD pack-

age. A high switching frequency (2 MHz) allows use of tiny

surface-mount components. Only three small external sur-

face-mount components, an inductor and two ceramic capac-

itors are required.

Thermal Overload Protection

Soft Start function

Applications

Cellular Phones

■

Hand-Held Radios

RF PC Cards

Battery Powered RF Devices

Typical Application

20141501

FIGURE 1. LM3202 Typical Application

201415

www.national.com

12 3 4 5 6 7...16

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