Analog Devices Inc. LTM4691 DC-DC µModule® Regulator

Analog Devices Inc. LTM4691 DC-DC µModule® Regulator is a complete 2A, dual-output, switching-mode DC-DC power supply in a tiny 3.0mm x 4.0mm x 1.18mm LGA package. Included in the package are the switching controller, power FETs, inductors, and all supporting components. Operating over an input voltage range of 2.25V to 3.6V, the LTM4691 supports two outputs with a programmable output voltage range from 0.5V to 2.5V set by external resistors. Its high-efficiency design delivers up to 2A 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 2MHz and can be synchronized from 1MHz to 3MHz. Its high switching frequency and a current mode architecture enables 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.

Features

Tiny surface mount, low profile 3mm x 4mm x 1.18mm LGA package
2.25V to 3.6V input voltage range
Dual 2A DC output current
±1.5% total output voltage regulation
Current mode control, fast transient response
External frequency synchronization
180° Out-of-Phase operation
Power Good indicator

Selectable modes
- Pulse-Skipping Mode
- Burst Mode^® Operation
- Forced Continuous Mode
Internal Soft-Start
Internal compensation
Overvoltage, Overcurrent, and Over-temperature Protection
Pb-free and RoHS compliant