The LTM4631 is a dual 10A or single 20A output switching mode step-down DC/DC µModule® regulator. Included in the package are the switching controller, power FETs, inductors and all supporting components. Operating from an input voltage range of 4.5V to 15V, the LTM4631 supports two outputs each with an output voltage range of 0.6V to 1.8V, each set by a single external resistor. Its high efficiency design delivers up to 10A continuous current for each output. Only a few input and output capacitors are needed.
The LTM4631 from Linear Technology, now part of Analog Devices, is a dual 10A or single 20A µModule® step-down regulator in an ultrathin 1.91mm LGA package with a 16mm x 16mm footprint. It can be placed on a PC board very close to its load such as an FPGA, while sharing one heat sink covering both of their low profile packages.
The small, thin package permits the LTM4631 to be mounted on the backside of circuit boards, freeing space on the topside for components such as DDR-QDR memory and transceiver ICs. Examples of applications include plug-in and mezzanine cards in embedded systems, data storage systems, gateway controllers and 40Gbps to 100Gbps networks.
The device supports frequency synchronization, multiphase operation, Burst Mode operation and output voltage tracking for supply rail sequencing and has an onboard temperature diode for device temperature monitoring. High switching frequency and a current mode architecture enable a very fast transient response to line and load changes without sacrificing stability.
The LTM4631 operates from 4.5V to 15V input supplies and regulates an output voltage from 0.6V to 1.8V with ±1.5% maximum total DC output voltage error from –40°C to 125°C. Its two outputs operate 180º out-of-phase, each capable of delivering 10A or 20A when the outputs current share. Two devices can current share, delivering up to 40A while minimising input and output ripple current.
Fault protection features include output over-current fold-back and over-voltage protection and the device is rated for operation from –40°C to 125°C. The LTM4631 is offered in an ultrathin 16mm × 16mm × 1.91mm LGA package that is Pb-free and ROHS compliant. The 1,000-piece pricing starts at $24.88 each.
The USA list pricing shown is for budgetary use only. International prices may differ due to local duties, taxes, fees and exchange rates.
For more information, visit www.linear.com/product/LTM4631.
