POWER AND LINEAR IC SOLUTIONS

High Performance, Dual Voltage Regulator

The Micrel MIC4742 is a high-efficiency PWM buck (step-down) regulator that provides a dual current output of 2A.

Targeting applications such as wired and wireless broadband communication equipment, printers, HD set top boxes and computing peripherals, the regulator operates at 2MHz. A proprietary internal compensation technique allows a closed loop bandwidth of over 200kHz. The Micrel MIC4742 has a wide junction operating temperature range from -40°C to +125°C.



The low on-resistance internal p-channel MOSFET of the MIC4742 allows power efficiencies of over 92% to be achieved.

This highly integrated device reduces the external component count and eliminates the need for an expensive current-sense resistor.

The MIC4742 operates from an input voltage between 2.9V and 5.5V; the output can be adjusted down to 0.6V. It can run with a maximum duty cycle of 100% making it suitable for use in low dropout conditions.

The devices are available in exposed pad, 16 pin, 3mm x 3mm MLF and ETSSOP-16 packages. Micrel also offers an evaluation kit to support this product (MIC4742YML EV).

Features

• 2MHz PWM mode
• 2A dual output
• >92% efficiency
• 100% maximum duty cycle
• Adjustable output voltage down to 0.6V
• Fully integrated 2A MOSFET switches
• 3mm x 3mm 16 pin MLF and 16 pin ETSSOP packages
• Broad junction temperature range: -40°C to +125°C

Applications

• Broadband xDSL modems
• Automotive radios
• STBs
• DVD recorders
• Computer peripherals
• General point of load

For further information, including the MIC4742 Datasheet, please click here.