Power Electronics / Power Management


Compact 3 A buck regulator is 91% efficient

1 June 2005 Power Electronics / Power Management

Sipex has added a new device to its PowerBlox family of high current, high voltage, ultra-miniature DC/DC buck regulators. The SP7653 is a 3 A, 1,3 MHz buck regulator suited for compact solution sizes in applications such as cable and DSL modems, set top boxes, plasma TVs, LCD monitors, high-end desktops and servers as well as networking and communications equipment.

The SP7653 is capable of handling an input voltage as high as 20 V and delivering output voltages as low as 0,8 V. By integrating high efficiency switches with a resistance of only 40 mΩ, the SP7653 offers up to 91% efficiency over a wide output voltage range (0,8 to 19 V).

Like other members of the PowerBlox family, it features programmable soft start, over-temperature protection, dual under-voltage lock-out thresholds, short circuit protection and power-up into a pre-charged output. PowerBlox ICs also have a proprietary chip-to-chip interface that allows designers to implement various power-up protocols, such as ratiometric, sequential and simultaneous.

The SP7653 comes in a 7 x 4 mm DFN package with three integrated heatsinks.



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