Datasheet > LM3202

LM3202

更新时间： 2024-11-19 21:53:43

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
15页	1504K
描述
650mA Miniature, Adjustable, Step-Down DC-DC Converter for RF Power Amplifiers

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LM3202 数据手册

October 2005

LM3202

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

Converter for RF Power Amplifiers

General Description

Features

n 2 MHz (typ.) PWM Switching Frequency

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.

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

n Variable Output Voltage (1.3V to 3.16V)

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

n 650mA Maximum load capability

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

from internal synchronous rectification

n 8-pin micro SMD Package

n Current Overload Protection

n Thermal Overload Protection

n Soft Start function

The LM3202 offers superior performance for mobile phones

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

eration minimizes RF interference. Shutdown function turns

the device off and reduces battery consumption to 0.01 µA

(typ.).

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

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

tiny surface-mount components. Only three small external

surface-mount components, an inductor and two ceramic

capacitors are required.

Applications

n Cellular Phones

n Hand-Held Radios

n RF PC Cards

n Battery Powered RF Devices

Typical Application

20141501

FIGURE 1. LM3202 Typical Application

DS201415

www.national.com

12 3 4 5 6 7...15

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