UNISONIC TECHNOLOGIES CO., LTD LR1185 Preliminary CMOS IC 150mA CMOS LDO WITH SHUTDOWN AND REFERENCE BYPASS 4 5 DESCRIPTION The UTC LR1185 is a 150 mA LDO regulator has very high PSRR and super low dropout voltage especially suitable for wireless and portable applications. In the field of hand-held wireless devices, board space and battery life are the main concerns of designers and end-users. Because of the low quiescent current and low ESR ceramic capacitors, UTC LR1185 can satisfy those concerns. Furthermore, low current consumption (50μA), high output accuracy, current limiting protection, and high ripple rejection ratio are advantages of UTC LR1185. 1 2 3 SOT-25 FEATURES * Operating voltage ranges : 2.7V~5.5V * Dropout : 100mV at 150mA * When IC shutdown: 5mA discharge current of VOUT * Extreme low Noise for DSC application * Extreme fast response in line/load transient * Internal current limiting protection * Internal thermal shutdown protection * High PSRR * Recommended 1μF output capacitor only for stability * With TTL logic controlled shutdown input ORDERING INFORMATION Note: Ordering Number LR1185G-xx-AF5-R xx: Output Voltage, refer to Marking Information. www.unisonic.com.tw Copyright © 2016 Unisonic Technologies Co., Ltd Package SOT-25 Packing Tape Reel 1 of 4 QW-R502-A43.c LR1185 Preliminary MARKING INFORMATION PACKAGE VOLTAGE CODE SOT-25 4B: 4.15V PIN CONFIGURATION PIN DESCRIPTION PIN NO. 1 2 3 4 5 CMOS IC PIN NAME VIN GND SHDN Bypass VOUT MARKING DESCRIPTION Unregulated supply input. Ground terminal. Shutdown control input. Reference bypass input. Connecting a 470pF to this input further reduces output noise. Regulated voltage output. BLOCK DIAGRAM Bypass Current Limit VIN VREF POR OTP + MOS Driver VOUT SHDN R GND UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 4 QW-R502-A43.c LR1185 Preliminary CMOS IC ABSOLUTE MAXIMUM RATING (TA=25°C, unless otherwise specified.) PARAMETER SYMBOL RATINGS UNIT Supply Input Voltage VIN 6 V Output Voltage VOUT -0.3 ~ VIN+0.3 V Power Dissipation (TA=25°C) PD 0.38 W Junction Temperature TJ 125 °C Ambient Operation Temperature TOPR -40~ +85 °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 RATINGS 330 UNIT °C/W SYMBOL VIN RATINGS 2.7 ~ 5.5 UNIT V OPERATING CONDITIONS PARAMETER Supply Input Voltage SYMBOL θJA ELECTRICAL CHARACTERISTICS (VIN=VOUT+0.5V, VEN=VIN, CIN=COUT =1μF (Ceramic), TA=25°C, unless otherwise specified.) PARAMETER SYMBOL TEST CONDITIONS MIN Input Voltage VIN 2.7 Output Voltage Accuracy ∆VOUT IOUT=10mA -2 Line Regulation Load Regulation (Note 1) ∆ V OUT VIN=(VOUT+0.5V)~5.5V, IOUT=1mA ∆ V IN × V OUT ∆VOUT VOUT 1mA<IOUT<150mA, 2.7V≤VIN≤5.5V TYP MAX UNIT 5.5 V 0 +2 % 0.01 0.2 %/V 0.5 1 % Quiescent Current (Note 2) IQ VEN=5V, IOUT=0mA 25 50 μA Standby Current ISTN-BY VEN=0V 1 μA Short Current ISC RLOAD=0Ω, 2.7V≤VIN≤5.5V 0.5 A Dropout Voltage (Note 3) VD IOUT=150mA 100 200 mV Soft Start Time VOUT=2.5V, CSS=1nF, COUT=1μF 0.7 1.2 ms Logic-Low VIL 0.6 V EN Threshold Logic-High VIH 1.6 V Enable Pin Current IEN 0.1 1 5 μA Over Temperature Shutdown OTS 170 °C Over Temperature Hysteresis OTH 30 °C Power Supply Rejection Rate PSRR IOUT=10mA, f=10kHz 55 dB Output Noise Voltage eN VOUT=1.5V,COUT=1μF,IOUT=0mA, CSS=1nF 40 μVRMS Notes: 1. Regulation is measured at constant junction temperature by using a 2ms current pulse. Devices are tested for load regulation in the load range from 1mA to 150mA. 2. Quiescent, or ground current, is the difference between input and output currents. It is defined by IQ=IIN IOUT under no load condition (IOUT=0mA). The total current drawn from the supply is the sum of the load current plus the ground pin current. 3. The dropout voltage is defined as VIN -VOUT, which is measured when VOUT is VOUT(NORMAL)×98%. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 4 QW-R502-A43.c LR1185 Preliminary CMOS IC TYPICAL APPLICATION 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 4 of 4 QW-R502-A43.c