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Dual, 26VIN, 4A DC/DC µModule Regulator in 15mm x 15mm Surface Mount Package

30th April 2010

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Datasheet

Linear Technology has introduced the LTM4619, a complete dual step-down DC/DC µModule regulator system, including inductors and MOSFETs in a tiny surface mount package. The LTM4619 regulates two output voltages ranging from 0.8V to 5V at up to 4A each from an input supply of 4.5V to 26.5V (28V abs max). The outputs are regulated with 180º out-of-phase operation to minimize input ripple current, thus requiring fewer input capacitors.

This complete dual DC/DC system solution includes all the necessary components for two point-of-load regulator circuits: inductors, bypass capacitors, DC/DC controllers, compensation circuitry and power switches. All components are encapsulated and protected within a plastic surface mount LGA (land grid array) package. Package dimensions are 15mm x 15mm with only 2.8mm of thickness, providing a low profile point-of-load regulator for more efficient air cooling in densely populated circuit boards. The LTM4619 is a simple single part dual DC/DC solution in an IC form factor, designed for systems requiring localized multirail regulation from input supplies such as 5V, 12V or 24V. Applications range from avionics and medical systems to datacom and enterprise equipment.

The LTM4619 has guaranteed total DC output error of only ±1.5%, which encompasses errors from the reference voltage as well as line and load regulation. As a current mode device with high switching frequency, the LTM4619 has very fast transient response to line and load changes while operating with excellent stability with a variety of external output capacitors. The efficiency is nominally 89% for 12VIN to 3.3VOUT at 4A. The device supports output voltage tracking and safety features, including overvoltage and overcurrent protection.