UNISONIC TECHNOLOGIES CO., LTD

L5100

LINEAR INTEGRATED CIRCUIT

www.unisonic.com.tw

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Copyright © 2010 Unisonic Technologies Co., LTD

QW-R103-024.C

WHITE LED STEP-UP

CONVERTER

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

ORDERING INFORMATION

Ordering Number

Package

Packing

L5100G-AF5-R

SOT-25

Tape Reel

MARKING