MIC4744 Datasheet | Micrel Semiconductor

Description The Micrel MIC4744 is a high efficiency dual PWM buck (step-down) regulator that provides dual 2A current output. The MIC4744 operates at 4MHz. A proprietary internal pensation technique allows a closed loop bandwidth of over 200k Hz. The low on-resistance internal P-Channel MOSFET of the MIC4744 allows efficiencies over 90%, reduces external ponents count and eliminates the need for an expensive current sense resistor. The MIC4744 operates from 2.9V to 5.5V input and the output can be adjusted down to 0.6V. The device can operate with a maximum duty cycle of 100% for use in lowdropout conditions. The MIC4744 is available in the exposed pad 16-pin 3mm x 3mm MLF® and ETSSOP-16 packages with junction operating temperature ranging from - 40°C to +125°C. All support documentation can be found on Micrel’s web site at: .micrel.. Features - 2.9 to 5.5V supply voltage - 4MHz PWM mode - 2A Dual output - Greater than 90% efficiency - 100% maximum duty cycle - Output voltage adjustable down to 0.6V - Ultra-fast transient response - Ultra-small external ponents Stable with a 0.47µH inductor and a 10µF output capacitor - Fully integrated 2A MOSFET switches - Micro-power shutdown - Thermal shutdown and current limit protection - Available in 3mm x 3mm 16-pin MLF® and 16-pin TSSOP packages - - 40°C to +125°C junction temperature range Applications - Broadband: x DSL modems - Automotive satellite radios - HD STB, DVD/TV recorder - puter peripherals: printers and graphic cards - FPGA/ASIC - General point of load Typical...