UNISONIC TECHNOLOGIES CO., LTD LR1120 Preliminary CMOS IC 500mA, LOW DROPOUT, LOW NOISE ULTRA-FAST WITH SOFT START CMOS LDO REGULATOR DESCRIPTION UTC LR1120, a 500mA 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 LR1120 can satisfy those concerns. Furthermore, low current consumption in shutdown mode (0.7μA), fast turn-on time (<70μs), high output accuracy, current limiting protection, and high ripple rejection ratio are advantages of UTC LR1120. FEATURES * Operating Voltage Ranges : 2.2V to 5.5V * Dropout : 250mV at 500mA * 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 Ordering Number LR1120G-xx-AF5-x-R LR1120G-xx-AL5-x-R Note: xx: Output Voltage, refer to Marking Information. www.unisonic.com.tw Copyright © 2015 Unisonic Technologies Co., Ltd Package SOT-25 SOT-353 Packing Tape Reel Tape Reel 1 of 4 QW-R502-331.l LR1120 Preliminary MARKING INFORMATION PACKAGE VOLTAGE CODE 18 :1.8V 25 :2.5V 28 :2.8V 30: 3.0V 31 :3.1V 33 :3.3V 40 :4.0V SOT-25 SOT-353 MARKING PIN DESCRIPTION CMOS IC A 1 2 PIN CODE B C 1 1 2 2 D 2 1 PIN NAME VIN GND 3 3 3 - EN 4 5 - 4 5 5 4 3 4, 5 SS VOUT NC DESCRIPTION Supply voltage input. Ground. Input logic pin, active high for enabling the chip. When this pin goes to a logic low, the chip will be shutdown. Soft start pin. Regulator output voltage pin. No Connection BLOCK DIAGRAM SS Current Limit VIN VREF POR OTP + MOS Driver VOUT EN R GND UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 4 QW-R502-331.l LR1120 Preliminary CMOS IC ABSOLUTE MAXIMUM RATING (TA= 25°C, unless otherwise specified.) PARAMETER Supply Input Voltage EN Input Voltage RATINGS UNIT 6 V 6 V SOT-25 0.38 W Power Dissipation (TA = 25°C) PD SOT-353 0.25 W Junction Temperature TJ 150 °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. SYMBOL VIN VEN THERMAL DATA PARAMETER Junction to Ambient SYMBOL SOT-25 SOT-353 θJA RATINGS 260 400 OPERATING CONDITIONS PARAMETER SYMBOL RATINGS Supply Input Voltage VIN 2.2 ~ 5.5 Junction Temperature TJ -40 ~ +125 Ambient Temperature TA -40 ~ +85 Note: The device is not guaranteed to function outside its operating conditions. UNIT °C/W °C/W UNIT V °C °C ELECTRICAL CHARACTERISTICS (VIN = VOUT + 0.5V, VEN = VIN, CIN = COUT = 1μF (Ceramic), TA= 25°C, unless otherwise specified.) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Input Voltage VIN 2.2 5.5 V Output Voltage Accuracy ∆VOUT IOUT = 10mA -2 0 +2 % ∆VOUT Line Regulation 0.01 0.2 %/V VIN = (VOUT+0.5V) ~ 5.5V, IOUT = 1mA ∆VIN × VOUT ∆VOUT 1mA<IOUT<400mA, 2.2V≤VIN<2.7V 0.6 % Load Regulation (Note 1) VOUT 1mA<IOUT<500mA, 2.7 V≤VIN≤5.5V 1 % Quiescent Current (Note 2) IQ VEN = 5V, IOUT = 0mA 25 50 μA Standby Current ISTN-BY VEN = 0V 0.7 1.5 μA RLOAD = 0Ω, 2.2V≤VIN<2.7V 0.4 0.7 1.05 A Current Limit ILIMIT RLOAD = 0Ω, 2.7V≤VIN≤5.5V 0.5 0.8 1.05 A IOUT = 400mA 160 320 Dropout Voltage (Note 3) VD mV IOUT = 500mA 250 400 Soft Start Time VOUT = 2.5V, CSS = 1nF, COUT = 1μF 0.7 1 ms Logic-Low VIL 0 0.6 V EN Threshold 1.6 5.5 V Logic-High VIH 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 500mA. 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-R502-331.l LR1120 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-R502-331.l