MIC5281 120V , 25mA, Ultra-Low IQ, High-PSRR IN Linear Regulator Features General Description Wide input voltage range: 6V to 120V DC The MIC5281 high-performance linear regulator offers a Ultra-low quiescent current: 6A very-wide input operating voltage range, up to 120V DC, and supplies an output current of up to 25mA. 25mA guaranteed output current Ideal for high input voltage applications such as industrial Adjustable output from 1.27V to 5.5V and telecom, the MIC5281 offers 3% initial accuracy, Withstands up to +120V DC at the input extremely high-power supply rejection ratio (>90db) and Stable with ceramic capacitors ultra-low quiescent current of 6A. The MIC5281 is Ultra-high PSRR >90dB optimized for high-voltage line transients, making it ideal Ultra-high line rejection (load dump) for harsh environment applications. High output accuracy: The MIC5281 is offered in both fixed output voltage (3.3V/5.0V) and adjustable output voltage (1.27V to 5.5V) 3% initial accuracy options. Thermal-shutdown and current-limit protection: The MIC5281 operates over a 40C to +125C Thermally-efficient, 8-pin MSOP, and 8-pin ePad temperature range and is available in lead-free, RoHS- MSOP packages compliant, 8-pin ePad MSOP, and 8-pin MSOP packages Applications Datasheets and support documentation are available on Micrels web site at: www.micrel.com. Industrial applications Remote keyless entry power supply Telecom applications Off-line power supplies Typical Application Quiescent Supply Current vs. Input Voltage 11.0 10.0 V = 5V OUT I = 0 OUT 9.0 8.0 7.0 6.0 5.0 4.0 3.0 2.0 1.0 0.0 0 20 40 60 80 100 120 INPUT VOLTAGE (V) Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (408) 944-0800 fax + 1 (408) 474-1000 Micrel, Inc. MIC5281 Ordering Information Part Number Output Voltage Top Mark Temperature Range Package Lead Finish MIC5281YMME Adjustable 781A 8-Pin ePad MSOP Pb-Free 40C to +125C MIC5281-3.3YMME 3.3V 781S 40C to +125C 8-Pin ePad MSOP Pb-Free MIC5281-5.0YMME 5.0V 7815 40C to +125C 8-Pin ePad MSOP Pb-Free 5281 MIC5281YMM Adjustable 40C to +125C 8-Pin MSOP Pb-Free YMM 5281 MIC5281-3.3YMM 3.3V 40C to +125C 8-Pin MSOP Pb-Free 3.3Y 5281 MIC5281-5.0YMM 5.0V 8-Pin MSOP Pb-Free 40C to +125C 5.0Y Pin Configuration 8-Pin ePAD MSOP 8-Pin MSOP MIC5281-x.xYMME MIC5281-x.xYMM (TOP VIEW) (TOP VIEW) 8-Pin ePAD MSOP 8-Pin MSOP MIC5281YMME MIC5281YMM (TOP VIEW) (TOP VIEW) Revision 3.0 October 2, 2014 2