UNISONIC TECHNOLOGIES CO., LTD LR18220 Preliminary CMOS IC 2A ULTRA LOW DROPOUT LINEAR REGULATOR DESCRIPTION The UTC LR18220 series of high performance ultra-low dropout linear regulators operates from 2.5V to 6V input supply and provides ultra-low dropout voltage, high output current with low ground current. These ultra-low dropout linear regulators respond fast to step changes in load which makes them suitable for low voltage micro-processor applications. The UTC LR18220 is CMOS-based positive voltage and a very low dropout regulator IC which allows low quiescent current operation independent of output load current. This CMOS process also allows the UTC LR18220 to operate under extremely low dropout conditions. FEATURES * 400mV Dropout @ 2A, VO=2.5V * Compatible with low ESR MLCC as Input/Output Capacitor * Good Line and Load Regulation * Guaranteed Output Current of 2A * Available in SOP-8 Package * Over-Temperature/Over-Current Protection ORDERING INFORMATION Ordering Number LR18220G-xx-S08-R www.unisonic.com.tw Copyright © 2015 Unisonic Technologies Co., Ltd Package SOP-8 Packing Tape Reel 1 of 4 QW-R102-073.a LR18220 Preliminary MARKING INFORMATION PACKAGE VOLTAGE CODE SOP-8 AD: ADJ PIN CONFIGURATION PIN DESCRIPTION PIN NO. 1 2 3 4 5 6 7 8 CMOS IC PIN NAME N.C EN VIN N.C N.C VOUT ADJ GND MARKING DESCRIPTION No connect Chip Enable Pin Input Supply Voltage Pin. No connect No connect Voltage Regulator Output Pin Feedback Pin Ground Pin BLOCK DIAGRAM VIN EN Reference (0.8V) Error AMP VOUT OCP/TSD ADJ GND UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 4 QW-R102-073.a LR18220 Preliminary CMOS IC ABSOLUTE MAXIMUM RATING PARAMETER SYMBOL RATINGS UNIT Input Supply Voltage (Survival) VIN 6 V Enable Input Voltage (Survival) VEN 6 V Maximum Output Current IMAX 2 A Lead Temperature (Soldering, 5 sec) TL 260 °C Operating Junction Temperature TJ -40 ~ 125 °C Storage Temperature TSTG -65 ~ 150 °C 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. THERMAL DATA PARAMETER Junction to Ambient SYMBOL θJA RATINGS 68 UNIT °C/W ELECTRICAL CHARACTERISTICS (Limits in standard typeface are for TJ=25°C, unless otherwise specified.) (VIN (Note 1) =VO (NOM) +1V, IL=10mA, CIN=10uF, COUT=10uF, VEN=VIN-0.3V) PARAMETER SYMBOL TEST CONDITIONS Output Voltage Tolerance VO VOUT+1V<VIN<5.5V Adjustable Pin Voltage VADJ 2.5V<VIN<5.5V Line Regulation ∆VLINE VOUT+1V<VIN<5.5V Load Regulation (Note 2) ∆VLOAD 10mA<IL<2A IL=200mA Dropout Voltage (Note 3) VDROP IL=2A IL=200mA Ground Pin Current IGND IL=2A Ground Pin Current IGND_OFF VEN<0.2V f=1kHz Power Supply Rejection Ratio PSRR f=1kHz, CFF=1uF Current Limit ILIMIT Thermal Shutdown Temperature TSD Logic Low VIL Output=Low Enable threshold Logic High VIH Output=High Enable Input Current IEN VEN=VIN MIN -3 0.776 TYP 0 0.8 0.15 0.20 45 400 0.30 0.30 0.5 55 65 4 170 MAX 3 0.824 0.40 0.60 65 600 1.0 1.0 2 0.4 0 mV mA uA dB 2.0 -1 UNIT % V V/% % 1 A °C V V uA Notes: 1. The minimum operating value for input voltage is equal to either (VOUT, NOM+VDROP) or 2.5V, whichever is greater. 2. Regulation is measured at constant junction temperature by using a 10ms current pulse. Devices are tested for load regulation in the load range from 10mA to 2A. 3. Dropout voltage is defined as the minimum input to output differential voltage at which the output drops 2% below the nominal value. Dropout voltage specification applies only to output voltages of 2.5V and above. For output voltages below 2.5V, the dropout voltage is nothing but the input to output differential, since the minimum input voltage is 2.5V. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 4 QW-R102-073.a LR18220 Preliminary CMOS IC TYPICAL APPLICATION CIRCUIT VIN VIN VOUT UTC LR18220 CIN 10uF EN VOUT CFF R2 COUT 10uF ADJ EN GND R1 Cff option notes: the capacitance of feed-forward capacitor with range of 10pF to 1uF allows to achieve better PSRR performance when required by the application 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 4 of 4 QW-R102-073.a