Datasheet > LM2662

LM2662

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
13页	277K
描述
Switched Capacitor Voltage Converter

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LM2662 数据手册

January 1999

LM2662/LM2663

Switched Capacitor Voltage Converter

General Description

Features

n Inverts or doubles input supply voltage

n Narrow SO-8 Package

The LM2662/LM2663 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 LM2662/LM2663

uses two low cost capacitors to provide 200 mA of output

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

based converters. With an operating current of only 300 µA

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

LM2662/LM2663 provides ideal performance for battery

powered systems. The LM2662/LM2663 may also be used

as a positive voltage doubler.

n 3.5Ω typical output resistance

n 86% typical conversion efficiency at 200 mA

n (LM2662) selectable oscillator

frequency: 20 kHz/150 kHz

n (LM2663) low current shutdown mode

Applications

n Laptop computers

n Cellular phones

n Medical instruments

n Operational amplifier power supplies

n Interface power supplies

n Handheld instruments

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 LM2662/LM2663 with an external clock. For

LM2662, a frequency control (FC) pin selects the oscillator

frequency of 20 kHz or 150 kHz. For LM2663, 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 10 µA. The oscillator frequency for LM2663 is 150 kHz.

Basic Application Circuits

Voltage Inverter

Splitting V_INin Half

DS100003-1

Positive Voltage Doubler

DS100003-3

DS100003-2

DS100003

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与LM2662相关器件

型号	品牌	获取价格	描述	数据表
LM2662M	NSC	获取价格	Switched Capacitor Voltage Converter
LM2662M	TI	获取价格	LM2662/LM2663 Switched Capacitor Voltage Converter
LM2662M/NOPB	TI	获取价格	200mA switched capacitor voltage converter 8-SOIC -40 to 85
LM2662MDC	TI	获取价格	SWITCHED CAPACITOR CONVERTER, 150kHz SWITCHING FREQ-MAX, UUC8, DIE
LM2662MDC	NSC	获取价格	IC SWITCHED CAPACITOR CONVERTER, 150 kHz SWITCHING FREQ-MAX, UUC8, DIE, Switching Regulato
LM2662MX	TI	获取价格	LM2662/LM2663 Switched Capacitor Voltage Converter
LM2662MX/NOPB	TI	获取价格	200mA switched capacitor voltage converter 8-SOIC -40 to 85
LM2663	TI	获取价格	LM2662/LM2663 Switched Capacitor Voltage Converter
LM2663	NSC	获取价格	Switched Capacitor Voltage Converter
LM2663M	NSC	获取价格	Switched Capacitor Voltage Converter