Micrel Gives the Consumer Market a Jolt with Cost Savings for DC-to-DC Converters

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Company Addresses Designers' Thirst for Smaller Footprint, Higher Operating/Transient Voltage for Popular 5V Bus

The consumer market just got a boost in the form of cost savings and enhanced voltage with Micrel’s new non-synchronous PWM buck regulator. Operating at 2MHz, the MIC4724 is the latest addition to Micrel’s popular MIC472x family of small footprint, non-synchronous buck regulators. The new solution addresses a designer’s need for higher operating/transient voltage for the popular 5V bus, while providing a smaller footprint and substantial cost savings. The MIC4724 targets wired and wireless broadband communications, printers, HD set top boxes, computing peripherals and low power FPGAs where total solution cost is critical.

The device is ideal for applications in today’s multiple-rail world, where designers have an insatiable need for cost effective power solutions addressing different voltage requirements. The enhanced voltage rating of the MIC4724 allows customers to stay with an inexpensive low voltage process. The improved voltage rating, along with the smaller footprint and low BOM cost, makes the device ideal for today’s growing broadband applications.

The MIC4724 features ultra fast operation and a proprietary internal compensation which allows for extremely fast transient response and the use of the smallest and most cost effective LC components in their class. A low resistance integrated p-channel MOSFET enables the chip to deliver up to 3A, where designers can realize more than 94% efficiency. The output voltage can be adjusted down to 1V and can operate with a maximum duty cycle of 100% for use in low dropout conditions. The P-MOSFET also eliminates the need for a sense resistor to provide a current limit, further reducing the external component count.

The MIC4724 operates at 2.0MHz and has proprietary internal compensation that allows a closed loop bandwidth of over 200kHz. The low on-resistance internal p-channel MOSFET of the MIC4724 allows efficiencies of more than 92%, reduces external components count and eliminates the need for an expensive current sense resistor.

 

FEATURES 3.0 to 6.0V supply voltage 2.0MHz PWM mode Output current to 3A Up to 94% efficiency 100% maximum duty cycle Adjustable output voltage option down to 1V Ultra fast transient response Ultra small external components Stable with a 1µH inductor and a 4.7µF output capacitor Fully integrated 3A MOSFET switch Micropower shutdown Thermal shutdown and current limit protection Pb-free 10-pin ePAD MSOP package -40ºC to +125ºC junction temperature range

APPLICATIONS Wired and wireless broadband communications Printers HD set top boxes Computing peripherals Low power FPGAs

 

 

 Featured Products

Part Number		Description	Data Sheet	App. Notes
MIC4724YMME		3A 2MHz Integrated Switch Buck Regulator with 6V Max. Input

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