MIC39100/1/2 1A, Low Voltage, Low Dropout Regulator with Reversed-Battery Protection Features General Description Fixed and Adjustable Output Voltages to 1.24V The MIC39100, MIC39101, and MIC39102 are 1A low dropout linear voltage regulators that provide low 410 mV Typical Dropout at 1A Load voltage, high current output from an extremely small - Best Recommended for 3.0V to 2.5V Conver- package. The MIC39100/1/2 offers extremely low sion dropout (typically 410mV at 1A) and low ground - Best Recommended for 2.5V to 1.8V Conver- current (typically 11 mA at 1A). sion The MIC39100 is a xed output regulator offered in the 1A Minimum Guaranteed Output Current SOT-223 package. The MIC39101 and MIC39102 are 1% Initial Accuracy xed and adjustable regulators, respectively, in a Low Ground Current thermally enhanced 8-lead SOIC package. Current-Limiting and Thermal-Shutdown The MIC39100/1/2 is ideal for PC add-in cards that Protection need to convert from standard 5V to 3.3V, 3.3V to 2.5V, Reversed-Battery and Reversed-Leakage or 2.5V to 1.8V. A guaranteed maximum dropout Protection voltage of 630 mV over all operating conditions allows Fast Transient Response the MIC39100/1/2 to provide 2.5V from a supply as low as 3.13V and 1.8V from a supply as low as 2.43V. Low Prole SOT-223 Package Power SO-8 Package The MIC39100/1/2 is fully protected with overcurrent limiting, thermal-shutdown, and reverse-battery Applications protection. Fixed voltages of 5.0V, 3.3V, 2.5V, and 1.8V LDO Linear Regulator for PC Add-In Cards are available on MIC39100/1 with adjustable output High-Efciency Linear Power Supplies voltages to 1.24V on MIC39102. SMPS Post Regulator Multimedia and PC Processor Supplies Battery Chargers Low Voltage Microcontrollers and Digital Logic Package Types MIC39102 (ADJ.) MIC39100-XX (FIXED) MIC39101-XX (FIXED) SOIC-8 (M) SOT-223 (S) SOIC-8 (M) (Top View) (Top View) (Top View) GND TAB EN 1 8 GND EN 1 8 GND IN 2 7 GND IN 2 7 GND OUT 3 6 GND OUT 3 6 GND FLG 4 5 GND ADJ 4 5 GND 1 23 IN GND OUT 2017 Microchip Technology Inc. DS20005834A-page 1MIC39100/1/2 Typical Application Circuits 2.5V/1A Regulator MIC39100 V IN IN OUT 2.5V 3.3V 10F GND TANTALUM 2.5V/1A Regulator with Error Flag 100k ERROR FLAG OUTPUT MIC39101 V IN IN OUT 2.5V 3.3V R1 ENABLE EN FLG SHUTDOWN 10F GND TANTALUM 1.5V/1A Adjustable Regulator MIC39102 V IN IN OUT 1.5V 2.5V R1 ENABLE EN ADJ SHUTDOWN R2 10F GND TANTALUM DS20005834A-page 2 2017 Microchip Technology Inc.