General Description

The Micrel MIC4742 is a high efficiency dual PWM buck (step-down) regulator that provides dual 2A current output. The MIC4742 operates at 2MHz. A proprietary internal compensation technique allows a closed loop bandwidth of over 200kHz.

Features

• 2.9 to 5.5V supply voltage

• 2MHz PWM mode

• 2A Dual output

• Greater than 92 efficiency

• 100 maximum duty cycle

• Adjustable output voltage option down to 0.6V

• Ultra-fast transient response

• Ultra-small external components Stable with a 1µH inductor and a 4.7µF output capacitor

• Fully integrated 2A MOSFET switches

• Micro-power shutdown

• Thermal shutdown and current limit protection

• Available in a 3mm x 3mm 16-pin MLF® and 16-pin TSSOP

• –40°C to +125°C junction temperature range

Applications

• Broadband: xDSL modems

• Automotive satellite radios

• HD STB, DVD/TV recorder

• Computer peripherals: printers and graphic cards

• FPGA/ASIC

• General point of load