LR3966 UNISONIC TECHNOLOGIES CO., LTD LINEAR INTEGRATED CIRCUIT 3.0A LOW DROPOUT LINEAR REGULATOR 1 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. 1 TO-263-5 TO-263 1 1 TO-252-5 SOT-223 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 LR3966G-xx-AA3-A-R LR3966G-xx-AA3-D-R LR3966L-xx-TQ2-A-T LR3966G-xx-TQ2-A-T LR3966L-xx-TQ2-A-R LR3966G-xx-TQ2-A-R LR3966L-xx-TQ2-D-T LR3966G-xx-TQ2-D-T LR3966L-xx-TQ2-D-R LR3966G-xx-TQ2-D-R LR3966L-xx-TN5-T LR3966G-xx-TN5-T LR3966L-xx-TN5-R LR3966G-xx-TN5-R LR3966L-xx-TQ5-T LR3966G-xx-TQ5-T LR3966L-xx-TQ5-R LR3966G-xx-TQ5-R Note: Pin Assignment: G: GND I: V IN O: V OUT E: EN LR3966G-xx-AA3-A-R Package 1 SOT-223 G SOT-223 I TO-263 G TO-263 G TO-263 I TO-263 I TO-252-5 E TO-252-5 E TO-263-5 E TO-263-5 E A: SENSE/ADJ Pin Assignment 2 3 4 O I G O O I O I G O G O I G O I G O I G O I G O 5 A A A A Packing Tape Reel Tape Reel Tube Tape Reel Tube Tape Reel Tube Tape Reel Tube Tape Reel (1) T: Tube, R: Tape Reel (1)Packing Type (2) refer to Pin Assignment (2)Pin Assignment (3) AA3: SOT-223, TN5: TO-252-5, TQ2: TO-263, (3)Package Type (3) TQ5-TO-263-5 (4)Output Voltage Code (4) xx: refer to Marking Information (5)Green Package (5) L: Lead Free, G: Halogen Free and Lead Free www.unisonic.com.tw Copyright © 2014 Unisonic Technologies Co., Ltd 1 of 7 QW-R101-032.F LR3966 LINEAR INTEGRATED CIRCUIT MARKING INFORMATION PACKAGE VOLTAGE CODE MARKING Pin Code SOT-223 Voltage Code LR3966G XXXXXXXX 1 Pin Code Voltage Code 18 :1.8V 33 :3.3V AD: ADJ TO-263 Voltage Code L: Lead Free G: Halogen Free Date Code Lot Code 3 L: Lead Free G: Halogen Free Date Code Lot Code 2 3 4 5 PIN CONFIGURATION 1 3 2 VIN GND VOUT SOT-223 2 UTC LR3966X XXXXXXXXXX 1 3 2 UTC LR3966X XXXXXXXXXXX 1 TO-252-5 TO-263-5 Date Code 1 VIN 2 GND TO-263 EN VIN GND VOUT 3 VOUT SENSE/ADJ 1 2 3 4 5 TO-252-5/TO-263-5 PIN DESCRIPTION PIN NAME EN V IN GND V OUT ADJ SENSE DESCRIPTION Active-Low Shutdown Input. Connect EN to V IN 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 an external resistive voltage-divider from V OUT 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 7 QW-R101-032.F LR3966 LINEAR INTEGRATED CIRCUIT BLOCK DIAGRAM VIN ON OFF Thermal Sensor Current Limit EN EN VOUT SENSE + 1.145V VREF ERR AMP - ADJ GND UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 7 QW-R101-032.F LR3966 LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATING (T A =25°С) PARAMETER SYMBOL RATINGS UNIT Input Supply Voltage(Survival) V IN 0~7.0 V Enable Input Voltage(Survival) V EN 0~7.0 V Power Dissipation PD 925 mW Operation Junction Temperature T OPR -40 ~ +125 °С Storage Temperature T STG -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: V IN =V O(NOM ) +1V or V IN =2.5V whichever is greater, I L =10mA, C IN =68µF, C OUT =33µF, V EN =V IN -0.3V, TJ=25°C. PARAMETER SYMBOL TEST CONDITION MIN TYP MAX UNITS 10mA<I L <3A -2 2 % Output Voltage Tolerance V OUT V OUT +1V<V IN <6V 10mA<I L <1.5A Adjustable Pin Voltage V ADJ 1.117 1.145 1.174 V (ADJ version) V OUT +1.5V<V IN <6V Line Regulation (Note 1) REGLINE V OUT +1V≤V IN ≤6V 0.08 0.18 %/V Load Regulation (Note 1, 2) REGLOAD 10mA≤I L ≤3A 0.25 0.55 % I L =300mA 50 65 Dropout Voltage (Note 3) V DROP mV I L =3A 480 580 I L =300mA 60 120 I GND1 µA Ground Pin Current I L =3A 60 120 I GND2 V EN <0.2V 0.1 5 µA Output Peak Current I PEAK 3.5 4.5 A V IH Output=High V IN /2+0.5 V IN Enable Threshold V V IL Output=Low 0 V IN /2-0.5 Enable Input Current I EN V EN =V IN 0.05 2 µA Thermal Shutdown Temperature T SD 165 °С Thermal Shutdown Hysteresis DT SD 10 °С Notes: 1. Output voltage line regulation is defined as the change in output voltage from the nominal value resulting from a change in the input line voltage. Output voltage load regulation is defined as the change in output voltage from the nominal value as the load current increases from no load to full load. 2. Regulation is measured at constant junction temperature by using a 20ms current pulse. Devices are tested for load regulation in the load range from 10mA to 3.0A 3. Dropout voltage is defined as the voltage from the input to output when output is 2% below the nominal value. Dropout voltage specification applies only to output voltages of 2.5V and above. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 of 7 QW-R101-032.F LR3966 LINEAR INTEGRATED CIRCUIT TYPICAL APPLICATION CIRCUIT VIN CIN + 68µF ON VOUT VIN R2 LR3966 VOUT ADJ EN OFF + COUT 33µF GND R1 VOUT=VREF(1+R2/R1) VOUT VIN CIN + 68uF ON VOUT VIN LR3966 SENSE EN OFF GND + COUT 33µF L O A D * LR3966 can deliver a continuous current of 3.0A over the full operating temperature. However, the output current is limited by the restriction of power dissipation which differs from packages. A heat sink may be required depending on the maximum power dissipation and maximum ambient temperature of application. With respect to the applied package, the maximum output current of 3.0A may be still undeliverable. * When a Pull-Up resistor is connected between V EN terminal and V EN Signal (or V IN line), the resistance of the Pull-Up resistor should be kept under 10kΩ. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 7 QW-R101-032.F LR3966 LINEAR INTEGRATED CIRCUIT TYPICAL CHARACTERISTICS (V IN = V OUT + 1V or V IN =2.25V whichever is greater , C IN =68µF, C OUT =33µF，T A = 25°C, unless otherwise specified) Temperature vs. Output Voltage Change 3.4 Ground Pin Current vs. Input Voltage VOUT=3.3V 250 Ground Pin Current, IGND (µA) 3.2 VOUT (V) 3.0 2.8 2.6 2.4 2.2 2.0 VOUT=1.8V 1.8 -40 -20 0 20 40 60 200 150 100 VOUT=3.3V 50 80 100 120 140 2 3 Temp (℃) 4 5 6 Input Voltage, VIN (V) Power ON Drop-Out Voltage vs. Load Current 480 420 Drop-Out (mV) 360 VOUT=3.3V 300 VIN 240 180 VOUT 120 60 0 0 400 800 1200 1600 2000 2400 2800 3200 Output Current, IOUT (mA) Load Transient VIN VOUT IL UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 6 of 7 QW-R101-032.F LR3966 LINEAR INTEGRATED CIRCUIT UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 7 of 7 QW-R101-032.F