CAT37 Datasheet (Catalyst Semiconductor) - CMOS White LED Driver Boost Converter

CAT37, CMOS White LED Driver Boost Converter

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.

The CAT37 is targeted to drive multiple white lightemitting diodes (LEDs

CAT37 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 Sh