MIC5190 Micrel MIC5190 Ultra High-Speed, High-Current Active Filter/LDO Controller General Description Features Input voltage range: The MIC5190 is an ultra high-speed linear regulator. It uses V = 0.9V to 5.5V an external N-Channel FET as its power device. IN +1.0% initial output tolerance The MIC5190 offers ultra high-speed to cope with the fast Dropout down to 25mV 10A load demands of microprocessor cores, ASICs, and other Filters out switching frequency noise on input high-speed devices. Signal bandwidths of greater than 500kHz Very high large signal bandwidth >500kHz can be achieved with a minimum amount of capacitance PSRR >40dB at 500kHz while at the same time keeping the output voltage clean, Adjustable output voltage down to 0.5V regardless of load demand. A powerful output driver delivers Stable with any output capacitor large MOSFETs into their linear regions, achieving ultra-low Excellent line and load regulation specifications dropout voltage. Logic controlled shutdown 1.25V 10% can be turned into 0.9V 1% without the use of IN Current limit protection a large amount of capacitance. 3mm 3mm 10-lead MLF and MSOP-10 packages MIC5190 (0.5V reference) is optimized for output voltages of Available 40C to +125C junction temperature below 1.0V. The MIC5190 is offered in 10-lead 3mm 3mm MLF and Applications 10-lead MSOP-10 packages and has an operating junction Distributed power supplies temperature range of 40C to +125C. ASIC power supplies All support documentation can be found on Micrels web DSP, P, and C power supplies site at www.micrel.com. Typical Application V = 12V CC C1 0.01 F V =1.2V V = 0.9V 7A IN OUT IR3716S MIC5190 IS OUT R1 100 VIN VCC1 FB C2 10 F VCC2 R2 PGND 125 EN SGND C3 COMP 0.01 F R3 12.5k GND GND MicroLeadFrame and MLF are trademarks of Amkor Technology, Inc. PowerPAK is a trademark of Siliconix, Inc. Micrel, Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel + 1 (408) 944-0800 fax + 1 (408) 474-1000 MIC5190 Micrel Ordering Information Part Number FB Output Output Junction Temp. Range Package Standard Pb-Free Voltage Current Voltage MIC5190BML MIC5190YML 0.5V ADJ ADJ 40C to +125C 10-pin MLF MIC5190BMM MIC5190YMM 0.5V ADJ ADJ 40C to +125C MSOP-10 Pin Configuration VIN 1 10 IS VIN 1 10 IS FB 2 9 PGND FB 2 9 PGND SGND 3 8 OUT SGND 3 8 OUT VCC1 4 7 VCC2 VCC1 4 7 VCC2 COMP 5 6 EN COMP 5 6 EN MLF-10 (ML) MSOP-10 (MM) Pin Description Pin Number Pin Name Pin Function 1 VIN Input voltage (Current Sense +). 2 FB Feedback input to error amplifier. 3 SGND Signal ground. 4 VCC1 Supply to the internal voltage regulator. 5 COMP Error amplifier output for external compensation. 6 EN Enable (Input): CMOS-compatible. Logic high = Enable, Logic low = Shutdown. Do not float pin. 7 VCC2 Power to output driver. 8 OUT Output drive to gate of power MOSFET. 9 PGND Power ground. 10 IS Current sense. December 2005 2 M9999-120105