Datasheet > LM3351MMX

LM3351MMX

更新时间： 2024-11-08 22:10:07

品牌	Logo	应用领域
美国国家半导体 - NSC		转换器开关光电二极管输入元件
页数	文件大小	规格书
8页	269K
描述
Switched Capacitor Voltage Converter

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中文翻译

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数据手册

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LM3351MMX 数据手册

December 1999

LM3351

Switched Capacitor Voltage Converter

n 4.2Ω typical step-up output impedance

n 1.8Ω typical step-down output impedance

n 95% typical power conversion efficiency at 50 mA

n 250 nA typical shutdown current

General Description

The LM3351 is a CMOS charge-pump voltage converter

which efficiently provides a 3.3V to 5V step-up, or 5V to 3.3V

step-down. The LM3351 is pin for pin compatible with the

LM3350 but consumes 66% less quiescent current. The

LM3351 uses four small, low cost capacitors to provide the

voltage conversion. It eliminates the cost, size and radiated

EMI related to inductor based circuits, or the power loss of a

linear regulator. Operating power conversion efficiency

greater than 90% provides ideal performance for battery

powered portable systems.

n Low quiescent current extends battary life

Features

n Conversion of 3.3V to 5V, or 5V to 3.3V

n Small Mini SO-8 package

n No inductor required

The architecture provides a fixed voltage conversion ratio of

3/2 or 2/3. Thus it can be used for other DC-DC conversions

as well.

Applications

n Any mixed 5V and 3.3V system

n Laptop computers and PDAs

n Handheld instrumentation

n PCMCIA cards

Key Specifications

n 200 kHz switch frequency allows use of very small,

inexpensive capacitors.

Ordering Information

NSC Package

Package

Order Number

Package Type

Supplied As

Marking

Drawing

MUA08A

LM3351MMX

LM3351MM

Mini SO-8

S05A

3500 Units on Tape and Reel

1000 Units on Tape and Reel

Basic Operating Circuits

Step-Up Converter

Step-Down Converter

DS100146-1

DS100146-2

Connection Diagram

Mini SO8 Package

DS100146-3

Top View

DS100146

www.national.com

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中文翻译

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与LM3351MMX相关器件

型号	品牌	获取价格	描述	数据表
LM3351MMX/NOPB	TI	获取价格	SWITCHED CAPACITOR CONVERTER, 275kHz SWITCHING FREQ-MAX, PDSO8, MINI, SO-8
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LM3352MTC-2.5	NSC	获取价格	Regulated 200 mA Buck-Boost Switched Capacitor DC/DC Converter
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LM3352MTCX-2.5/NOPB	TI	获取价格	SWITCHED CAPACITOR REGULATOR, 1350 kHz SWITCHING FREQ-MAX, PDSO16
LM3352MTCX-3.0	NSC	获取价格	Regulated 200 mA Buck-Boost Switched Capacitor DC/DC Converter
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LM3354	NSC	获取价格	Regulated 90mA Buck-Boost Switched Capacitor DC/DC Converter