L1188_10

UNISONIC TECHNOLOGIES CO., LTD L1188 800mA CMOS LDO DESCRIPTION As UTC LDO, the features of the UTC L1188 include low quiescent current and very low dropout voltage. In order prevent form the bad operating conditions, there are internal thermal shutdown and current fold-back. For stably operation, the UTC L1188 should be connected to an output capacitance of 2.2μF or larger. The UTC L1188 can be an ideal for battery applications, such as portable electronics, wireless devices, cordless phones, PC peripherals and battery powered widgets. Preliminary CMOS IC 1 FEATURES * Extra Low Dropout Voltage * Output Current: 800mA (Guaranteed) * Output Voltage Accuracy:±1.5% * Quiescent Current: 30μA * Internal Over-Temperature Shutdown * With Current limiting * Internal Short Circuit Current Fold-Back * Pre-set Output Voltages In Factory * Very Low Temperature Coefficient SOT-223 ORDERING INFORMATION Ordering Number Package 1 G Pin Assignment 2 3 O I Packing Tape Reel L1188G-xx-AA3-A-R SOT-223 Note: Pin Assignment: G:GND O:VOUT I:VIN xx: Output Voltage, refer to Marking Information. www.unisonic.com.tw Copyright © 2010 Unisonic Technologies Co., Ltd 1 of 6 QW-R502-324.c L1188 MARKING INFORMATION PACKAGE VOLTAGE CODE Preliminary CMOS IC MARKING SOT-223 28 :2.8V 33:3.3V PIN CONFIGURATION PIN DESCRIPTION PIN NO. 1 2 3 PIN NAME GND VOUT VIN DESCRIPTION Ground. Output voltage pin which should be decoupled with a ceramic capacitor (Value: 2.2µF or larger and low ESR). Input voltage pin which should be decoupled with 1µF or greater capacitor. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 6 QW-R502-324.c L1188 BLOCK DIAGRAM VIN Preliminary CMOS IC Overcurrrent Shutdown Thermal Shutdown VREF=1.215V AMP VOUT R1 R2 GND UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 6 QW-R502-324.c L1188 Preliminary CMOS IC ABSOLUTE MAXIMUM RATING PARAMETER SYMBOL RATINGS UNIT Input, Output Voltage GND - 0.3 ~ VIN + 0.3 V Input Voltage VIN 8 V Output Current IOUT 1 A Power Dissipation PD 800 mW Junction Temperature TJ 125 °C Ambient Operating Temperature TOPR - 40 ~ +85 °C Storage Temperature TSTG - 65 ~ +150 °C Notes: 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 Junction to Case (Note) Note: Measure θJC on backside center of tab. SYMBOL θJA θJC RATINGS 135 31 UNIT °C/W °C/W ELECTRICAL CHARACTERISTICS (Ta = 25°C, unless otherwise specified.) PARAMETER Input Voltage Output Voltage Accuracy Line Regulation Load Regulation Output Current Current Limit Short Circuit Current Quiescent Current Ground Pin Current Dropout Voltage Over Temperature Shutdown Over Temperature Hysteresis Temperature Coefficient of Output Voltage Power Supply Ripple Rejection SYMBOL TEST CONDITIONS MIN TYP VIN Note1 VOUT IOUT = 1mA -1.5 1.8V≤VOUT≤2.0V -0.15 ΔVOUT IOUT=1mA 2.0V