MIC4782YML-TR Microchip

MIC4782 1.8 MHz Dual 2A Integrated Switch Buck Regulator General Description Features The Micrel MIC4782 is a high efficiency dual PWM buck 3.0 to 6.0V supply voltage (step-down) regulator that provides dual 2A output current. 1.8MHz PWM mode The MIC4782 operates at 1.8MHz. A proprietary internal 2A dual output compensation technique allows a closed loop bandwidth of Greater than 92% efficiency over 200kHz. 100% maximum duty cycle The low on-resistance internal P-Channel MOSFET of the Adjustable output voltage option down to 0.6V MIC4782 allows efficiencies over 92%, reduces external components count and eliminates the need for an Ultra-fast transient response expensive current sense resistor. Ultra-small external components Stable with a 1H inductor and a 4.7F output The MIC4782 operates from 3.0V to 6.0V input and the capacitor output can be adjusted down to 0.6V. The device can operate with a maximum duty cycle of 100% for use in low- Fully integrated 2A MOSFET switches dropout conditions. Micro-power shutdown The MIC4782 is available in the exposed pad 16-pin Thermal shutdown and current limit protection 3mm x 3mm MLF with a junction operating range from Available in a 3mm 3mm 16-pin MLF 20C to +125C. 20 C to +125 C junction temperature range All support documentation can be found on Micrels web Applications site at: www.micrel.com. Broadband: xDSL modems Automotive satellite radios HD STB, DVD/TV recorder Computer peripherals: printers and graphic cards FPGA/ASIC General point-of-load Typical Application 5.0V , 3.3V Efficiency IN OUT 100 98 96 94 92 90 88 86 84 82 80 0 0.4 0.8 1.2 1.6 2 OUTPUT CURRENT (A) 2A, 1.8MHz Dual 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. MIC4782 Ordering Information Part Number Voltage Junction Temp. Range Package Lead Finish MIC4782YML Adj. 20 to +125C 16-Pin 3mm x 3mm MLF Pb-Free Note: MLF is a GREEN RoHS-compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free. Pin Configuration 16-Pin 3mm x 3mm MLF (YML) 2 August 2009 M9999-081709-D