The LTM4626 and LTM4638, from Analog Devices, are high efficiency, step-down µModule® regulators capable of 12 A and 15 A continuous output current, respectively, from input voltages between 3.1 V and 20 V.
The LTM4626 and LTM4638 each feature an innovative 3D packaging assembly, known as component on package (CoP), where the inductor sits on top of the µModule device. The inductor’s relatively high mass, when combined with direct exposure to air or attached to a traditional heatsink, effectively draws heat from the internal MOSFETs, resulting in fast and efficient cooling of these small footprint packages. These regulators can support outputs at full load when other regulators must throttle down. For example, both regulators can produce 1 V at full load (12 A or 15 A) from a 12 V input at 75°C ambient with 200 LFM airflow. Because they operate as current mode dc-to-dc regulators, multiple devices can be easily combined in parallel to share higher load currents.
Parallel regulators can operate out-of-phase to reduce input and output ripple—simply connect the output and input clock pins of multiple devices. Total output voltage dc accuracy is guaranteed at ±1.5% over line, load, and temperature (–40°C to +125°C). To compensate for any voltage drop caused by parasitic impedance under high current conditions, the LTM4626 and LTM4638 include remote sense capability. Output voltage tracking and soft-start features allow users to customize supply sequencing. The switching frequency can be set via a simple external single resistor—from 400 kHz to 3 MHz—or synchronized to an external clock. The LTM4626 and LTM4638 feature identical pinouts.
The 6.25 mm × 6.25 mm LTM4626 and LTM4638 12 A and 15 A µModule regulators deliver high power from tiny, thermally efficient packages. The CoP construction takes advantage of the exposed inductor as a heatsink for fast and efficient cooling. Only a few additional components are required to complete a compact regulator solution. Multiple devices can be easily paralleled for increased loads to produce true high power density solutions.
To learn more, download the PDF below.
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