DESCRIPTION

The UTC L5100 is a STEP-UP DC/DC Converter and designed for driving white LEDs with a constant current. It can drive several LEDs in series by a Li-Ion cell. UTC L5100 switches at a high frequency 1.2MHz, so it can allow the use of tiny external components. The output capacitor can be as small as 0.22μF; saving space and cost compare with alternative other solutions. The low 95mV feedback voltage minimizes power loss in the current setting resistor can have better efficiency.

FEATURES

* Inherently Matched LED Current

* High Efficiency: 83% Typical

* Drives Up to Four LEDs from a 3.2V Supply

* Drives Up to Six LEDs from a 5V Supply

* 36V Rugged Bipolar Switch

* 1.2MHz Switching Frequency

* Uses Tiny 1mm Tall Inductors

* Output Capacitor can be Small to only 0.22μF