Ultrathin 3-A micromodule regulator fits 6.25-mm x 6.25-mm footprint

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By eeNews Europe

With solder paste, the package height is less than 2 mm, meeting the height restrictions of many PCIe (Peripheral Component Interconnect Express), Advanced Mezzanine Cards (AMC) for AdvancedTCA carrier cards in embedded computing systems. The small size and low height allow the LTM4623 to be mounted on the backside of the PCB, freeing space on the topside for components such as memory and FPGAs. The LTM4623 operates from 4 V to 20 V input supplies and precisely regulates an output voltage from 0.6 V to 5.5 V with 1.5% maximum total DC output voltage error.   Application examples include ultra-dense data storage, gateway controllers and 40Gbps to 100Gbps network equipment.

The LTM4623 solution fits in a 0.5 cm2 dual-sided PCB or <1 cm2 on a single-sided PCB. The circuit only requires one input capacitor and one output capacitor, a resistor to set VOUT, and a small capacitor for VOUT tracking and soft-start. With an auxiliary 5 V bias, the LTM4623 operates from input supplies as low as 2.375 V. The operating efficiency for converting 12 VIN to 1.5 VOUT and 3.3 VOUT at 3 A is 80% and 88%, respectively. Power loss for 12 VIN to 1.5 VOUT is 1.1 W, resulting in only a 24°C rise in junction temperature. The LTM4623 is rated for operation from -40°C to 125°C.

Availability and Pricing

1,000-piece pricing starts at $6.41 each.


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