Microchip | MIC4744YTSE

The MIC4744YTSE is a high efficiency dual PWM buck (step-down) regulator that provides dual 2 A current output. The MIC4744 operates at 4 MHz. A proprietary internal compensation technique allows a closed loop bandwidth of over 200 kHz.

The low on-resistance internal P-Channel MOSFET of the MIC4744 allows efficiencies over 90%, reduces external components count and eliminates the need for an expensive current sense resistor.The MIC4744 operates from 2.9 V to 5.5 V input and the output can be adjusted down to 0.6 V. The device can operate with a maximum duty cycle of 100% for use in low-dropout conditions.

Features:

• 2.9 to 5.5 V supply voltage
• 4 MHz PWM mode
• 2 A Dual output
• Greater than 90% efficiency
• 100% maximum duty cycle
• Output voltage adjustable down to 0.6 V
• Ultra-fast transient response
• Ultra-small external components
• Stable with a 0.47 µH inductor and a 10µF output capacitor
• Fully integrated 2 A MOSFET switches
• Micro-power shutdown
• Thermal shutdown and current limit protection
• Available in 3 mm x 3 mm 16-pin
• MLF ® and 16-pin ETSSOP packages
• –40 ° C to +125 ° C junction temperature range

Applications:

• Broadband:xDSL Modems
• Automotive satellite radios
• HD STB,DVD/TV recorder 
• Computer Peripherals: Printers and graphics cards
• FPGA/ASIC 
• General point of load