Datasheet > LM2687MDC

LM2687MDC

更新时间： 2024-09-16 21:12:39

品牌	Logo	应用领域
美国国家半导体 - NSC		/
页数	文件大小	规格书
10页	288K
描述
IC,DC/DC CONVERTER,-1.5 TO -5.2V,CMOS,DIE

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技术参数
数据手册

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LM2687MDC 技术参数

是否Rohs认证：	符合	生命周期：	Obsolete
包装说明：	, DIE OR CHIP	Reach Compliance Code：	compliant
风险等级：	5.84	最大输入电压：	5.5 V
最小输入电压：	2.7 V	湿度敏感等级：	1
最高工作温度：	85 °C	最低工作温度：	-40 °C
最大输出电流：	0.01 A	最大输出电压：	-5.2 V
最小输出电压：	-1.5 V	封装等效代码：	DIE OR CHIP
认证状态：	Not Qualified	子类别：	Other Analog ICs
技术：	CMOS	温度等级：	INDUSTRIAL
Base Number Matches：	1

LM2687MDC 数据手册

April 2003

LM2687

Low Noise Regulated Switched Capacitor Voltage

Inverter

General Description

Features

n Inverts and regulates the input supply voltage

n Small MSOP-8 or LLP-8 package

The LM2687 CMOS Negative Regulated Switched Capacitor

Voltage Inverter delivers a very low noise adjustable output

for an input voltage in the range of +2.7V to +5.5V. Four low

cost capacitors are used in this circuit to provide up to 10mA

of output current. The regulated output for the LM2687 is

adjustable between −1.5V and −5.2V. The LM2687 operates

at 100 kHz (typical) switching frequency to reduce output

resistance and voltage ripple. With an operating current of

only 500 µA (charge pump power efficiency greater than

90% with most loads) and 0.05 µA typical shutdown current,

the LM2687 provides ideal performance for cellular phone

power amplifier bias and other low current, low noise nega-

tive voltage needs. The device comes in a small 8-pin MSOP

or LLP package.

n 91% typical charge pump power efficiency at 10mA

n Low output ripple (1mV typical)

n Shutdown lowers Quiescent current to 0.05 µA (typical)

Applications

n Wireless Communication Systems

n Cellular Phone Power Amplifier Biasing

n Interface Power Supplies

n Handheld Instrumentation

n Laptop Computers and PDA’s

Typical Application Circuit

10118001

Connection Diagrams

8-Pin MSOP

8-Pin LLP

10118002

10118025

DS101180

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