LT1020 Datasheet | Linear Technology

Features s Input Voltage Range: 4.5V to 36V s 40µA Supply Current s 125m A Output Current s 2.5V Reference Voltage s Reference Output Sources 1m A and Sinks 0.5m A s Dual Output parator s parator Sinks 10m A s Dropout Detector s 0.2V Dropout Voltage s Thermal Limiting s Available in SO Package U APPLICATIO S s Battery Systems s Battery Backup Systems s Portable Terminals s Portable Instruments Micropower Regulator and parator DESCRIPTIO The LT®1020 is a bination micropower positive regulator and free collector parator on a single monolithic chip. With only 40µA supply current, the LT1020 can supply over 125m A of output current. Input voltage range is from 4.5V to 36V and dropout voltage is 0.6V at 125m A. Dropout voltage decreases with lower load currents. Also included on the chip is a class B output 2.5V reference that can either source or sink current. A dropout detector provides an output current to indicate when the regulator is about to drop out of regulation. The dual output parator can be used as a parator for system or battery monitoring. For example, the parator can be used to warn of low system voltage while the dropout detector shuts down the system to prevent abnormal operation. Frequency pensation of the parator for amplifier applications can be obtained by adding external output capacitance. Dual output or positive and negative regulators can also be made. The 2.5V reference will source or sink current. This allows it to be used as a supply splitter or auxiliary output. , LTC and LT are registered trademarks of Linear Technology Corporation. TYPICAL APPLICATIO 5V Regulator VIN > 5.2V IQ = 40µA + 3 VIN 10µF 2 VOUT LT1020 GND FB 11 0.001µF 1M + 1M 5V 10µF 1020 TA01 Dropout Voltage and Supply Current 1 10 0.1 1 DROPOUT VOLTAGE (V) SUPPLY CURRENT (m A) 0.01...