Datasheet > 电源电路 > 开关式稳压器或控制器> SS6639-50CZTR

SS6639-50CZTR

更新时间： 2024-11-25 06:13:59

品牌	Logo	应用领域
SSC		稳压器开关式稳压器或控制器电源电路开关式控制器
页数	文件大小	规格书
12页	136K
描述
1-Cell, 3-Pin, Step-Up DC/DC Controller

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中文翻译

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技术参数
数据手册

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SS6639-50CZTR 技术参数

生命周期：	Contact Manufacturer	包装说明：	,
Reach Compliance Code：	unknown	风险等级：	5.77
Is Samacsys：	N	Base Number Matches：	1

SS6639-50CZTR 数据手册

SS6639

1-Cell, 3-Pin, Step-Up DC/DC Controller

FEATURES

GENERAL DESCRIPTION

Guaranteed start-up from less than 0.9 V.

The SS6639 is a high efficiency step-up DC/DC

controller for applications using 1 to 4 battery cells. Only

three external components are required to deliver a

fixed output voltage of 2.7, 3.0V, 3.3V, or 5V. The

SS6639 starts up from less than 0.9V input with a 1mA

load. The Pulse Frequency Modulation scheme offers

optimized performance for applications with light output

loading and low input voltages. The output ripple and

noise are lower than with circuits operating in PSM

mode.

High efficiency.

Low quiescent current.

Fewer external components needed.

Low ripple and low noise.

Fixed output voltage: 2.7, 3.0V, 3.3V, and 5V.

Driver for external transistor.

Space-saving package: SOT-89 and TO-92.

APPLICATIONS

Pagers.

The PFM control circuit operating up to 100 KHz

switching rate results in smaller passive components.

The space-saving SOT-89 and TO-92 packages make

the SS6639 an ideal choice of DC/DC controller for

space-conscious applications, such as pagers,

electronic cameras, and wireless microphones.

Cameras.

Wireless Microphones.

Pocket Organizers.

Battery Backup Suppliers.

Portable Instruments.

Using an external transistor driver pin (EXT), the

SS6639 is recommended for applications requiring

currents from several tens to several hundreds of

milliamperes.

TYPICAL APPLICATION CIRCUIT

OUT

33mH

GS SS14

47mF

SS6639-27

SS6639-30

SS6639-33

SS6639-50

VOUT

EXT

300

*Q1

2SD1803

100mF

GND

10nF

*Q1: Sanyo 25D1803S-TC 60V/5A/20W

100mA Load Current Step-Up Converter

Rev.2.01 6/26/2003

www.SiliconStandard.com

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