Datasheet > STD1937

STD1937

更新时间： 2024-11-03 17:15:47

品牌	Logo	应用领域
司坦森 - STANSON		/
页数	文件大小	规格书
6页	197K
描述
SOT-23-5L

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STD1937 数据手册

ST1937

DC-DC Step-Up Converter for White LED Driver

DESCRIPTION

ST1937 is a step-up DC/DC converter for white LED driver with constant current. The device

can driver one to four LEDs in series from a single cell Lithium ion battery. Internal functions

include current limiting; thermal shutdown and soft-start to prevent damage operate status.

ST1937 DC/DC converter operates at 1.2MHz and low output capacitor as small as 0.22uF;

apply to Lithium-Ion powered systems. A low 100mV reference voltage minimizes power loss

in the current setting resistor for better efficiency.

APPLICATIONS

PIN CONFIGURATION

Battery Powered Devices

SOT23-5L

SOT-353 ( SC-70-5L )

Digital Camera

PDA

GPS

Hand Held Communication Equipment

MP3/4

FEATURES

Fast 1.2MHz Switching Frequency

PART MARKING

High Efficiency up to 85%

Drives up to Four LEDs From 3.2V

Supply

Low Quiescent Current

Internal Over Temperature and Current

Limiting Shutdown Function

Internal Soft-Start Circuit

Available in a Small SOT-23-5L &

SOT-353 Package

ORDERING INFORMATION

Part Number

ST1937S25RG

Package

SOT-23-5L

Part Marking

37YW

ST1937S35RG

SOT-353 ( SC-70-5L )

37YW

※ Week Code : A ~ Z( 1 ~ 26 ) ; a ~ z( 27 ~ 52 )

※ ST1937S25RG : S25 : SOT-23-5 ; R : Tape Reel ; G : Pb – Free

※ ST1937S35RG : S35 : SOT-353 ; R : Tape Reel ; G : Pb – Free

STANSON TECHNOLOGY

120 Bentley Square, Mountain View, Ca 94040 USA

www.stansontech.com

ST1937 2005. V1

12 3 4 5 6

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