Datasheet > LM2787

LM2787

更新时间： 2024-09-24 22:51:43

品牌	Logo	应用领域
美国国家半导体 - NSC		开关
页数	文件大小	规格书
8页	207K
描述
Low Noise Regulated Switched Capacitor Voltage

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LM2787 数据手册

August 2002

LM2787

Low Noise Regulated Switched Capacitor Voltage

Inverter in micro SMD

General Description

Features

n Inverts and regulates the input supply voltage

n Small 8-Bump micro SMD package

The LM2787 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 LM2787 is

adjustable between −1.5V and −5.2V. The LM2787 operates

at 260 kHz (typical) switching frequency to reduce output

resistance and voltage ripple. With an operating current of

only 400 µA (charge pump power efficiency greater than

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

the LM2787 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-Bump

micro SMD package.

n 91% typical charge pump power efficiency at 10mA

n Low output ripple

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 and Connection Diagram

10131325

8-Bump micro SMD (Top View)

10131302

DS101313

www.national.com

12 3 4 5 6 7 8

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与LM2787相关器件

型号	品牌	获取价格	描述	数据表
LM2787BP	NSC	获取价格	Low Noise Regulated Switched Capacitor Voltage
LM2787BPX	NSC	获取价格	Low Noise Regulated Switched Capacitor Voltage
LM2787BPX	TI	获取价格	0.01A SWITCHED CAPACITOR REGULATOR, 450kHz SWITCHING FREQ-MAX, PBGA8, SMD-8
LM2787TP	ROCHESTER	获取价格	0.01A SWITCHED CAPACITOR REGULATOR, 450kHz SWITCHING FREQ-MAX, PBGA8, SMD-8
LM2787TP/NOPB	ROCHESTER	获取价格	0.01A SWITCHED CAPACITOR REGULATOR, 450kHz SWITCHING FREQ-MAX, PBGA8, SMD-8
LM2787TP/NOPB	TI	获取价格	0.01A SWITCHED CAPACITOR REGULATOR, 450kHz SWITCHING FREQ-MAX, PBGA8, SMD-8
LM2787TPX/NOPB	TI	获取价格	0.01A SWITCHED CAPACITOR REGULATOR, 450kHz SWITCHING FREQ-MAX, PBGA8, SMD-8
LM2788	NSC	获取价格	120mA High Efficiency Step-Down Switched Capacitor Voltage Converter
LM2788MM-1.5	NSC	获取价格	120mA High Efficiency Step-Down Switched Capacitor Voltage Converter
LM2788MM-1.8	NSC	获取价格	120mA High Efficiency Step-Down Switched Capacitor Voltage Converter