L11810_10

UNISONIC TECHNOLOGIES CO., LTD L11810 Preliminary CMOS IC 1A CMOS LOW DROPOUT VOLTAGE DESCRIPTION As UTC LDO, the features of the UTC L11810 include low quiescent current and very low dropout voltage. In order to prevent from the bad operating conditions, there are internal thermal shutdown and current fold-back. For stably operation, the UTC L11810 should be connected to an output capacitance of 2.2μF or larger. The UTC L11810 is ideal for battery applications, such as portable electronics, wireless devices, cordless phones, PC peripherals and battery powered widgets. 1 FEATURES * Extra low dropout voltage * Output current: 1A (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 * Halogen Free SOT-223 ORDERING INFORMATION Ordering Number Package L11810G-xx-AA3-A-R SOT-223 L11810G-xx-AA3-D-R SOT-223 Note: Pin Assignment: G:GND O:VOUT I:VIN xx: Output Voltage, refer to Marking Information. G I Pin Assignment O I G O Packing Tape Reel Tape Reel www.unisonic.com.tw Copyright © 2010 Unisonic Technologies Co., Ltd 1 of 6 QW-R502-329.c L11810 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 VIN GND VOUT DESCRIPTION Input voltage pin which should be decoupled with 1µF or greater capacitor. Ground. Output voltage pin which should be decoupled with a ceramic capacitor (value: 2.2µF or larger and low ESR). UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 6 QW-R502-329.c L11810 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-R502-329.c L11810 ABSOLUTE MAXIMUM RATING Preliminary CMOS IC PARAMETER SYMBOL RATINGS UNIT Input Voltage VIN 8 V Input ,Output Voltage GND - 0.3 ~ VIN + 0.3 V Output Current IOUT 1.2 A Power Dissipation PD 900 mW Junction Temperature TJ 125 °C Operating 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 Junction to Case (Note) Note: Measure θJC on backside center of tab SYMBOL θJA θJC RATINGS 120 25 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 VIN VOUT IOUT =1mA 1.8V≤VOUT≤2.0V ΔVOUT IOUT =1mA, 2.0V