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CAT37 - CMOS White LED Driver Boost Converter

Description

The CAT37 is a DC/DC step up converter that delivers a regulated output current.

Operation at a constant switching frequency of 1.2MHz allows the device to be used with very small value external inductor and ceramic capacitors.

Features

  • s Low quiescent ground current (0.5mA typical) s Power efficiency over 80% s Compatible pinout with LT1937 s Adjustable output current (up to 40mA) s High frequency 1.2MHz operation s Input voltage operation down to 2.5V s Low resistance (0.5Ω) power switch s Drives up to 4 White LEDs in series s Shutdown current less than 1µA H GEN FR ALO EE LE A D F R E ETM s Load fault protection against open-circuits s Low value external components s Low profile 5-lead SOT23 (1mm max) and TDFN (0.8mm).

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Datasheet Details

Part number CAT37
Manufacturer Catalyst Semiconductor
File Size 168.66 KB
Description CMOS White LED Driver Boost Converter
Datasheet download datasheet CAT37 Datasheet

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Full PDF Text Transcription

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CAT37 CMOS White LED Driver Boost Converter FEATURES s Low quiescent ground current (0.5mA typical) s Power efficiency over 80% s Compatible pinout with LT1937 s Adjustable output current (up to 40mA) s High frequency 1.2MHz operation s Input voltage operation down to 2.5V s Low resistance (0.5Ω) power switch s Drives up to 4 White LEDs in series s Shutdown current less than 1µA H GEN FR ALO EE LE A D F R E ETM s Load fault protection against open-circuits s Low value external components s Low profile 5-lead SOT23 (1mm max) and TDFN (0.8mm) package APPLICATIONS s Color LCD and keypad backlighting s Cellular phones s Handheld terminals s Digital cameras s PDAs/Games s Portable MP3 players DESCRIPTION The CAT37 is a DC/DC step up converter that delivers a regulated output current.
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