LT1120A Datasheet | Linear Technology

Micropower Regulator with parator and Shutdown Features s 20µA Supply Current s 125m A Output Current s 2.5V Reference s Reference Output Sources 4m A and Sinks 4m A s Open Collector parator Sinks 10m A s Logic Shutdown s 0.2V Dropout Voltage s Thermal Limiting s 8-Lead SO Package U APPLICATIO S s Battery Systems s Battery Backup System s Portable Terminals s Portable Instruments s Memory Keep Alive DESCRIPTIO The LT®1120A is a bination micropower positive regulator and free collector parator on a single monolithic chip. With only 20µA supply current, the LT1120A 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. This allows it to be used as a supply splitter or auxiliary output. A shutdown pin allows logic shutdown of the output. The parator can be used for system or battery monitoring. For example, the parator can be used to warn of low system voltage. Frequency pensation of the parator for amplifier applications can be obtained by adding external output capacitance. , LTC and LT are registered trademarks of Linear Technology Corporation. SUPPLY CURRENT (m A) TYPICAL APPLICATIO 5V Regulator VIN > 5.2V IQ = 20µA + 10µF 5 VIN VOUT 4 LT1120A GND FB 2 SHUTDOWN 0.001µF 1M + 1M 5V 25µF 1120A TA01 DROPOUT VOLTAGE (V) Dropout Voltage and Supply Current 1.00 10 0.10 1 0.01 0.1 1 10 100 OUTPUT CURRENT (m A) 0.1...