MIC49500WR Microchip

MIC4950 Hyper Speed Control 5A Buck Regulator Features General Description Input Voltage: 2.7V to 5.5V The MIC4950 is a highly efficient, 5A synchronous buck regulator with ultra-fast transient response. It is 5A Output Current perfectly suited for supplying processor core and I/O Up to 95% Efficiency voltages from a 5V or 3.3V bus. The MIC4950 provides Up to 3.3 MHz Operation a switching frequency up to 3.3 MHz while achieving Safe Start-Up Into a Pre-Biased Output peak efficiencies up to 95%. An additional benefit of Power Good Output high-frequency operation is very low output ripple voltage throughout the entire load range with the use of Ultra-Fast Transient Response a small output capacitor. The MIC4950 is designed for Low Output Voltage Ripple use with a very small inductor, down to 1 H, and an Low R Integrated MOSFET Switches DS(ON) output ceramic capacitor as small as 10 F, without the 0.01 A Shutdown Current need for external ripple injection. The MIC4950 can Thermal Shutdown and Current-Limit Protection also accommodate a wide range of output capacitor Output Voltage as Low as 0.7V types and values. 3 mm x 4 mm 10-Lead FDFN The MIC4950 supports safe start-up into a pre-biased 40C to +125C Junction Temperature Range output, and offers short-circuit and thermal shutdown protections. Applications The MIC4950 is available in a 10-lead 3 mm x 4 mm FDFN package with an operating junction temperature DTVs range from 40C to +125C. Set-Top Boxes Printers Package Type DVD Players Distributed Power Supplies MIC4950 10-Lead FDFN (FL) (Top View) PGND 1 10 SW EP PGND 2 9 EN PVIN 3 8 PVIN AVIN 4 7 PG AGND 5 6 FB 2021 Microchip Technology Inc. DS20006514A-page 1MIC4950 Typical Application Circuit MIC4950 MIC4590YFL VIN VOUT 1H 2.7V to 5.5V 1.8V SW PVIN R1 10F C F AVIN PG N 10V 22pF C OUT 10F FB ON EN R2 OFF N PGND AGND GND GND Functional Block Diagram AVIN PVIN EN CONTROL UVLO LOGIC TIMER & SOFTSTART GATE SW REFERENCE DRIVE ERROR COMPARATOR CURRENT + LIMIT PGND - ISENSE + - PG FB AGND DS20006514A-page 2 2021 Microchip Technology Inc.