MIC4720YMME Microchip

MIC4720 3mm x 3mm 2.0MHz 2A Integrated Switch Buck Regulator General Description Features The Micrel MIC4720 is a high efficiency PWM buck (step- 2.7 to 5.5V supply voltage down) regulator that provides up to 2A of output current. 2.0MHz PWM mode The MIC4720 operates at 2.0MHz and has proprietary Output current to 2A internal compensation that allows a closed loop bandwidth Up to 94% efficiency of over 200KHz. 100% maximum duty cycle Adjustable output voltage option down to 1V The low on-resistance internal p-channel MOSFET of the Ultra-fast transient response MIC4720 allows efficiencies over 92%, reduces external components count and eliminates the need for an Ultra-small external components Stable with a 1H inductor and a 4.7F output expensive current sense resistor. capacitor The MIC4720 operates from 2.7V to 5.5V input and the Fully integrated 2A MOSFET switch output can be adjusted down to 1V. The devices can Micropower shutdown operate with a maximum duty cycle of 100% for use in low- Thermal shutdown and current limit protection dropout conditions. package Pb-free 12-pin 3mm x 3mm MLF The MIC4720 is available in the exposed pad 12-pin 40 C to +125 C junction temperature range 3mm x 3mm MLF and 10-pin ePad MSOP package with a Pb-free 10-pin ePad MSOP package junction operating range from 40C to +125C. Applications FPGA/DSP/ASIC applications General point of load Broadband communications DVD/TV recorder Point of Sale Printers/Scanners Set Top Boxes Computing Peripherals Video Cards Typical Application MIC4720 3.3V Efficiency OUT 100 V = 4.5V IN 95 MIC4720 90 V = 5.0V IN V = 5.5V 85 IN 80 75 70 65 OUTPUT CURRENT (A) 2A 2.0MHz Buck Regulator MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc. Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (408) 944-0800 fax + 1 (408) 474-1000 Micrel, Inc. MIC4720 Ordering Information Part Number Voltage Junction Temp. Range Package Lead Finish MIC4720YML Adj. 40 to +125C 12-Pin 3x3 MLF Pb-Free MIC4720YMME Adj. 40 to +125C 10-Pin ePad Pb-Free MSOP Pin Configuration SW 1 12 SW SW 1 10 SW VIN 2 11 VIN VIN 2 9 VIN PGND 3 10 PGND SGND 3 8 PGND SGND 4 9 PGOOD BIAS 4 7 PGOOD BIAS 5 8 EN FB 5 6 EN FB67EP NC 10-Pin ePad MSOP (MM) 12-Pin 3mm x 3mm MLF (ML) M9999-051707 May 2007 2