LM2611

更新时间： 2024-11-22 23:16:47

品牌	Logo	应用领域
美国国家半导体 - NSC		转换器
页数	文件大小	规格书
13页	360K
描述
1.4MHz Cuk Converter

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LM2611 数据手册

January 2002

LM2611

1.4MHz Cuk Converter

General Description

Features

n 1.4MHz switching frequency

n Low R_DS(ON)DMOS FET

n 1mVp-p output ripple

The LM2611 is a current mode, PWM inverting switching

regulator. Operating from a 2.7 - 14V supply, it is capable of

producing a regulated negative output voltage of up to

−(36-V_IN(MAX)). The LM2611 utilizes an input and output

inductor, which enables low voltage ripple and RMS current

on both the input and the output. With a switching frequency

of 1.4MHz, the inductors and output capacitor can be physi-

cally small and low cost. High efficiency is achieved through

the use of a low R_DS(ON)FET.

n −5V at 300mA from 5V input

n Better regulation than a charge pump

n Uses tiny capacitors and inductors

n Wide input range: 2.7V to 14V

n Low shutdown current: 1uA

n 5-lead SOT-23 package

The LM2611 features a shutdown pin, which can be acti-

vated when the part is not needed to lower the Iq and save

battery life. A negative feedback (NFB) pin provides a simple

method of setting the output voltage, using just two resistors.

Cycle-by-cycle current limiting and internal compensation

further simplify the use of the LM2611.

Applications

n MR Head Bias

n Digital camera CCD bias

n LCD bias

The LM2611 is available is a small SOT23-5 package. It

comes in two grades:

n GaAs FET bias

n Positive to negative conversion

Grade A

1.2A

Grade B

0.9A

Current Limit

R_DS(ON)

0.5Ω

0.7Ω

Typical Application Circuit

20018117

DS200181

www.national.com

12 3 4 5 6 7...13

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与LM2611相关器件

型号	品牌	获取价格	描述	数据表
LM2611_05	NSC	获取价格	1.4MHz Cuk Converter
LM2611AMF	NSC	获取价格	1.4MHz Cuk Converter
LM2611AMF	TI	获取价格	1.4MHz Cuk 转换器 \| DBV \| 5 \| -40 to 125
LM2611AMF/NOPB	TI	获取价格	1.4MHz Cuk 转换器 \| DBV \| 5 \| -40 to 125
LM2611AMF/NOPB	NSC	获取价格	IC 2 A SWITCHING REGULATOR, 1800 kHz SWITCHING FREQ-MAX, PDSO5, LEAD FREE, SOT-23, 5 PIN,
LM2611AMFX	NSC	获取价格	1.4MHz Cuk Converter
LM2611AMFX/NOPB	ROCHESTER	获取价格	2 A SWITCHING REGULATOR, 1800 kHz SWITCHING FREQ-MAX, PDSO5, SOT-23, 5 PIN
LM2611AMFX/NOPB	NSC	获取价格	IC 2 A SWITCHING REGULATOR, 1800 kHz SWITCHING FREQ-MAX, PDSO5, SOT-23, 5 PIN, Switching R
LM2611AMFX/NOPB	TI	获取价格	1.4MHz Cuk 转换器 \| DBV \| 5 \| -40 to 125
LM2611BMF	NSC	获取价格	1.4MHz Cuk Converter