Linear Technology has a low quiescent current, 2-phase dual output synchronous step-down DC/DC controller that draws only 170µA with one output active and only 300µA when both outputs are active.

With both outputs shut down, the LTC3858/-1 draws 8µA.

The device has an input supply range of 4V to 38V, which will protect against automotive wide input voltage transients commonly found during load dump and cold crank conditions and to cover a broad range of battery chemistries.

Each output can be set from 0.8V to 24V at output currents up to 20A with efficiency as high as 95%. The LTC3858/-1 is suitable for powering high performance systems including navigation, audio, communications, CD/DVD players and disk drives.

The chip is offered in a 32-lead 5x5mm QFN package, with the LTC3858-1 in 28-pin SSOP or 4x5mm QFN-28 packages.