LM2661M

更新时间： 2024-11-23 00:01:07

品牌	Logo	应用领域
美国国家半导体 - NSC		转换器开关
页数	文件大小	规格书
12页	299K
描述
Switched Capacitor Voltage Converter

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数据手册

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LM2661M 数据手册

September 1999

LM2660/LM2661

Switched Capacitor Voltage Converter

General Description

Features

n Inverts or doubles input supply voltage

n Narrow SO-8 and Mini SO-8 Package

n 6.5Ω typical output resistance

The LM2660/LM2661 CMOS charge-pump voltage con-

verter inverts a positive voltage in the range of 1.5V to 5.5V

to the corresponding negative voltage. The LM2660/LM2661

uses two low cost capacitors to provide 100 mA of output

current without the cost, size, and EMI related to inductor

based converters. With an operating current of only 120 µA

and operating efficiency greater than 90% at most loads, the

LM2660/LM2661 provides ideal performance for battery

powered systems. The LM2660/LM2661 may also be used

as a positive voltage doubler.

n 88% typical conversion efficiency at 100 mA

n (LM2660) selectable oscillator frequency: 10 kHz/80 kHz

n (LM2661) low current shutdown mode

Applications

n Laptop computers

n Cellular phones

The oscillator frequency can be lowered by adding an exter-

nal capacitor to the OSC pin. Also, the OSC pin may be used

to drive the LM2660/LM2661 with an external clock. For

LM2660, a frequency control (FC) pin selects the oscillator

frequency of 10 kHz or 80 kHz. For LM2661, an external

shutdown (SD) pin replaces the FC pin. The SD pin can be

used to disable the device and reduce the quiescent current

to 0.5 µA. The oscillator frequency for the LM2661 is 80 kHz.

n Medical instruments

n Operational amplifier power supplies

n Interface power supplies

n Handheld instruments

Basic Application Circuits

Voltage Inverter

Positive Voltage Doubler

DS012911-3

DS012911-4

Splitting V_INin Half

DS012911-26

DS012911

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与LM2661M相关器件

型号	品牌	获取价格	描述	数据表
LM2661M/NOPB	TI	获取价格	IC SWITCHED CAPACITOR CONVERTER, 80 kHz SWITCHING FREQ-MAX, PDSO8, SOIC-8, Switching Regul
LM2661MDC	NSC	获取价格	IC SWITCHED CAPACITOR CONVERTER, 80 kHz SWITCHING FREQ-MAX, UUC, DIE, Switching Regulator
LM2661MDC	TI	获取价格	SWITCHED CAPACITOR CONVERTER, 80kHz SWITCHING FREQ-MAX, UUC, DIE
LM2661MM	NSC	获取价格	Switched Capacitor Voltage Converter
LM2661MM/NOPB	TI	获取价格	SWITCHED CAPACITOR CONVERTER, 80kHz SWITCHING FREQ-MAX, PDSO8, MINI, SO-8
LM2661MMX	ETC	获取价格	DC-to-DC Voltage Converter
LM2661MMX/NOPB	TI	获取价格	SWITCHED CAPACITOR CONVERTER, 80kHz SWITCHING FREQ-MAX, PDSO8, MINI, SO-8
LM2661MWC	TI	获取价格	暂无描述
LM2661MX	ETC	获取价格	DC-to-DC Voltage Converter
LM2661MX/NOPB	ROCHESTER	获取价格	SWITCHED CAPACITOR CONVERTER, 80kHz SWITCHING FREQ-MAX, PDSO8, SOIC-8