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Quad output, triple monolithic switching regulator

13 May 2018

Analog Devices has introduced Power by Linear LT8603, a 42V input capable, high efficiency quad output monolithic switching regulator.

The unit incorporates a boost controller with two high-voltage 2.5A and 1.5A synchronous step-down channels and a lower voltage 1.8A synchronous step-down channel to provide four independent outputs. It can be configured with the boost controller to supply the input of the buck converters, enabling it to deliver three precisely regulated outputs. This is the case even when the input falls significantly below the regulated output voltages. Alternatively, the boost controller can be driven from one of the step-down outputs, providing four precisely regulated outputs with a very compact solution footprint.

The triple buck synchronous rectification topology delivers up to 93% efficiency while its patented Burst Mode operation keeps quiescent current under 28µA (high voltage channels active) in no-load standby conditions, ideal for always-on systems. For noise-sensitive applications, its’s low EMI design meets the CISPR 25, Class 5 EMI requirements even when switching at 2MHz.


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