UNISONIC TECHNOLOGIES CO., LTD

LR478

LINEAR INTEGRATED CIRCUIT

www.unisonic.com.tw

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Copyright © 2005 Unisonic Technologies Co., LTD

QW-R119-003.B

REGULATOR+RESET IC

DESCRIPTION

The UTC LR478 developed for use in CD-ROM drives,

combines a 3V regulator adapted to low power consumption with

a much-sought reset function (regulator input monitoring),with

internal delay circuit, set to detect 4.2V.

FEATURES

*Large Output Current: 300mA (max.)

*High Ripple Rejection Rate: 80dB(typ.)

*Internal Thermal Shutdown Circuit

*Internal Current Limiting Circuit

*Easy Set Delay Time from Voltage Detection to Reset Release

SOP-8

*Pb-free plating product number: LR478L

ORDERING INFORMATION

Order Number

Normal

Lead Free Plating

Package

Packing

LR478-xx-S08-R

LR478L-xx-S08-R

SOP-8

Tape Reel

LR478-xx-S08-T

LR478L-xx-S08-T

SOP-8

Tube

Note: xx: Output Voltage, refer to Rank List as below.

OUTPUT DETECTION VOLTAGE RANK LIST

PART NUMBER

REGULATOR OUTPUT VOLTAGE (V)

DETECTION VOLTAGE (V)

LR478-3.4V

3.40±0.05

4.20±0.09

LR478-3.3V

3.30±0.05

4.20±0.09

LR478-2.5V

2.50±0.05

4.20±0.09