LTC1703CG

The LTC1703CG by LT is a dual, 550kHz synchronous 2-phase switching regulator controller designed for high efficiency in low input voltage applications. It features two independent controllers, each capable of driving external N-channel MOSFETs in a synchronous buck configuration. This controller supports digital output voltage adjustment conforming to the Intel Mobile VID specification.

Key electrical specifications include an input voltage range of 3V to 7V and an output voltage range of 0.9V to 2V. The device operates at a constant frequency of 550kHz, minimizing component size and optimizing load transient performance. It automatically shifts to discontinuous and Burst Mode operation at lower loads to ensure maximum efficiency across a wide current range.

The LTC1703CG is housed in a 28-lead SSOP package. It includes an onboard reference trimmed to 1% and offers better than 1.5% regulation at the converter outputs. An optional latching FAULT mode provides load protection against overvoltage conditions. Each channel can be enabled independently, and when both are disabled, the device enters a shutdown state with supply current below 100µA.