UNISONIC TECHNOLOGIES CO.,

L5100

LINEAR INTEGRATED CIRCUIT

www.unisonic.com.tw

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Copyright © 2005 Unisonic Technologies Co.,

QW-R103-024,A

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 allowing 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

SOT-25

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SOT-363

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*Pb-free plating product number: L5100L

ORDERING INFORMATION

Ordering Number

Normal

Lead Free Plating

Package

Packing

L5100-AF5-R

L5100L-AF5-R

SOT-25

Tape Reel

L5100-AN3-R

L5100L-AN3-R

SOT-363

Tape Reel