CAT4137
CMOS Boost Converter - White LED Driver
Features
• • • • • • • • • • • • Drives up to 5 White LEDs from 3V Power Efficiency up to 87% Low Quiescent Ground Current 0.
1mA Adjustable Output Current (up to 30mA) High Frequency 1MHz Operation “Zero” current shutdown mode Operates down to 2V (from two AA batteries) Soft start power-up Open LED low power mode Automatic shutdown at 1.
9V (UVLO) Thermal shutdown protection Thin SOT23 5-Lead (1mm max height)
Product Description
The CAT4137 is a DC/DC step-up converter that delivers a regulated output current.
Operation at a constant switching frequency of 1MHz allows the device to be used with small value external ceramic
capacitors and induc...