UNISONIC TECHNOLOGIES CO., LTD L1152 Preliminary CMOS IC 500mA, LOW DROPOUT, LOW NOISE ULTRA-FAST WITH SOFT START CMOS LDO REGULATOR DESCRIPTION UTC L1152, a 500mA LDO regulator, has very high PSRR and super low dropout voltage specially 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 L1152 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 L1152. 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 * Halogen free ORDERING INFORMATION Ordering Number Package L1152G-xx-AF5-R SOT-25 Note: xx: Output Voltage, refer to Marking Information. www.unisonic.com.tw Copyright © 2009 Unisonic Technologies Co., Ltd Packing Tape Reel 1 of 5 QW-R502-331.b L1152 CMOS IC MARKING INFORMATION PACKAGE VOLTAGE CODE SOT-25 33 :3.3V MARKING PIN CONFIGURATION EN GND VIN 3 2 1 4 SS Preliminary 5 VOUT PIN DESCRIPTION PIN NO 1 2 PIN NAME VIN GND 3 EN 4 SS 5 VOUT 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. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 5 QW-R502-331.b L1152 Preliminary CMOS IC BLOCK DIAGRAM SS Current Limit VIN VREF POR OTP + MOS Driver VOUT EN R GND UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 5 QW-R502-331.b L1152 Preliminary CMOS IC ABSOLUTE MAXIMUM RATING PARAMETER SYMBOL RATINGS UNIT Supply Input Voltage VIN 6 V EN Input Voltage VEN 6 V Power Dissipation (Ta = 25°C) PD 0.4 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. THERMAL DATA PARAMETER Junction to Ambient SYMBOL θJA RATINGS 250 UNIT °C/W RATINGS 2.2 ~ 5.5 −40 ~ +125 −40 ~ +85 UNIT V °C °C OPERATING CONDITIONS (Note) PARAMETER SYMBOL Supply Input Voltage VIN Junction Temperature TJ Ambient Temperature TA Note: The device is not guaranteed to function outside its operating conditions. 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 Range VIN 2.2 5.5 V Output Voltage Accuracy ΔVOUT IOUT = 10mA -2 0 +2 % ΔVOUT VIN = (VOUT+0.5V) ~ 5.5V 0.01 0.2 %/V Line Regulation ΔVIN × VOUT IOUT = 1mA 1mA<IOUT<400mA 0.6 % ΔVOUT 2.2V≤VIN<2.7V Load Regulation (Note 1) VOUT 1mA<IOUT<500mA 1 % 2.7 V≤VIN≤5.5V Quiescent Current (Note 2) IQ VEN = 5V, IOUT = 0mA 25 50 μA 0.7 1.5 μA Standby Current ISTN-BY VEN = 0V RLOAD = 0Ω, 2.2 V≤VIN<2.6V 0.4 0.7 1.05 A Current Limit ILIMIT RLOAD = 0Ω, 2.7 V≤VIN≤5.5V 0.5 0.8 1.05 A IOUT = 400mA, 2.2V≤VIN<2.7V 160 320 mV Dropout Voltage (Note 3) VD IOUT = 500mA, 2.7V≤VIN ≤5.5V 250 400 mV 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 -55 dB (f = 10kHz) VOUT = 1.5V, COUT = 1μF, 40 μVrms Output Noise Voltage eN IOUT = 0mA, CSS = 1nF 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 10mA 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) - 100mV. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 of 5 QW-R502-331.b L1152 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 5 of 5 QW-R502-331.b