LTM4691 Dual 2 A Output Switching Mode DC/DC Power Supply

ADI's LTM4691 is a complete dual 2A output switching mode DC/DC power supply in a tiny 3 mm × 4 mm × 1.18 mm LGA package. Included in the package are the switching controller, power FETs, inductors, and all supporting components. Operating over an input voltage range of 2.25 V to 3.6 V, the LTM4691 supports two outputs with programmable output voltage range from 0.5 V to 2.5 V set by external resistors. Its high efficiency design delivers up to 2 A continuous current on each output. Only bulk input and output capacitors are needed.

The LTM4691 operates in forced continuous mode for low noise pulse-skipping mode or Burst Mode® operation for high efficiency at lights loads. The typical buck switching frequency is 2 MHz and can be synchronized from 1 MHz to 3 MHz. Its high switching frequency and a current mode architecture enable a very fast transient response to line and load changes without sacrificing stability.

Other features include precision run thresholds, a PGOOD signal, output overvoltage protection, thermal shutdown, and output short-circuit protection. The LTM4691 is Pb-free and RoHS compliant.