Dual Output DC/DC Converter

May 13, 2015 | 09:58
Dual output regulator from Linear Tech
Dual output regulator from Linear Tech
Linear Tech has recently added the LTC3892 voltage regulator chip to their already impressive palette of voltage regulator devices. The LTC 3892 is a dual step-down DC/DC switching regulator controller that drives external (all N-channel) synchronous power MOSFET stages. Power losses and noise in the system are minimized by operating the two controller output stages out-of-phase. The controller can be programmed to operate with FETs with standard gate voltage characteristics or FETs with logic-level drive. Internal switches in the top-gate drivers ensure that external bootstrap diodes are not required in the design.

The input voltage range is an impressive 4.5 to 60 V and its low dropout voltage means that it will still be working with a Vout approaching 99% of Vin. Linear Tech’s OPTILOOP compensation feature allows the transient response and loop stability to be optimized while working into loads with a wide range of capacitance and ESR values.

The 29 µA no-load current (one channel ON) and 3.6 µA (shutdown) current ensures good battery life when the regulator is used in mobile devices. The LTC3892 is available as a 32-lead 5 x 5 mm QFN outline and the LTC3892-1 as a 28-lead TSSOP package.
related items