LR3966L-XX-TN5-D-R

UNISONIC TECHNOLOGIES CO., LTD LR3966 Preliminary LINEAR INTEGRATED CIRCUIT 3.0A LOW DROPOUT LINEAR REGULATOR DESCRIPTION The LR3966 is a low-noise, low-dropout linear regulator operated from a 2.5V to 6V input voltage and is guaranteed to deliver 3A output current. Wide range of preset output voltage options are available. Built-in low on-resistance transistor provides low dropout voltage and large output current. The LR3966 is designed and optimized for battery-powered systems to work with low noise. The LR3966 is developed on a CMOS process technology which allows low quiescent current operation independent of output load current.. This CMOS process also allows the LR3966 to operate under extremely low dropout conditions. FEATURES * 3A Guaranteed Output Current * Ultra Low Dropout Voltage * Low Ground Pin Current * Low Temperature Coefficient * Current Limiting Protection * Thermal Shutdown Protection * Excellent Line/Load Transient * SENSE Option Improves Load Regulation ORDERING INFORMATION Ordering Number Lead Free Halogen Free LR3966L-xx-TN5-D-R LR3966G-xx-TN5-D-R Package TO-252-5 Packing Tape Reel www.unisonic.com.tw Copyright © 2010 Unisonic Technologies Co., Ltd 1 of 9 QW-R101-032.b LR3966 PACKAGE VOLTAGE CODE Preliminary LINEAR INTEGRATED CIRCUIT MARKING INFORMATION MARKING TO-252-5 33 :3.3V PIN CONFIGURATION EN VIN GND VOUT SENCE/ADJ 1 2 3 4 5 PIN DESCRIPTION PIN NO. 1 2 3 4 5 PIN NAME EN VIN GND VOUT ADJ SENSE DESCRIPTION Active-Low Shutdown Input. Connect EN to VIN for normal operation. Power Input Voltage. Supply voltage can range from 2.5V to 6V. Bypass with a 68µF capacitor to GND. Ground Output Voltage Voltage-adjust Input. Connect ADJ to GND for preset output. Connect an external resistive voltage-divider from VOUT to ADJ to set the output voltage between 1.145V and 5V. Remote sense pin. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 9 QW-R101-032.b LR3966 BLOCK DIAGRAM Preliminary LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 9 QW-R101-032.b LR3966 Preliminary LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATING (TA=25°С) PARAMETER SYMBOL RATINGS UNIT Input Supply Voltage(Survival) VIN 0~7.0 V Enable Input Voltage(Survival) VEN 0~7.0 V Power Dissipation PD 925 mW Operation Junction Temperature Range TOPR -40 ~ +125 °С Storage Temperature Range TSTG -65 ~ +150 °С Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. ELECTRICAL CHARACTERISTICS Unless otherwise specified: VIN=VO(NOM)+1V or VIN=2.5V whichever is greater, IL=10mA, CIN=68µF, COUT=33µF, VEN=VIN-0.3V . Limits in standard typeface are for TJ=25°С, and limits in boldface type apply over the full operating temperature range. PARAMETER SYMBOL TEST CONDITION MIN TYP MAX UNITS 10mA