Buck converter has very low series resistance

The 1.5A-rated AP5101 buck converter from Diodes Incorporated enables designers to reduce circuit footprints in a range of products including set-top boxes, modems and distributed power systems.

The AP5101 buck converter operates at a fixed switching frequency of 1.4MHz.

The reduction in size of the inductor and other standard external components resulting from the higher operating frequency, combined with the converter's compact SO-8 packaging and integrated low RDSON power Mosfet switch, means board space savings can be achieved.

A minimised external component count also provides increased flexibility in circuit design.

Characterised by its very low series resistance, the AP5101 delivers a constant output current up to a peak of 1.5A for an efficiency as high as 92 per cent, over a wide input supply range of 4.75V to 22V.

A fast transient response eases loop stabilisation requirements and the output is adjustable from 0.81V to 15V.

The AP5101 is self-protected through cycle-by-cycle current limiting and thermal shutdown protection.

The converter has an enable pin allowing it to be switched off into a standby mode, consuming just 0.1uA.

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