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36V 4A DC-DC Buck Module Boasts Tiny Footprint

Texas Instruments (TI) has introduced what it claims is the industry’s smallest 36V, 4A power module in a quad flat no-lead (QFN) package. The TPSM53604 DC/DC buck module’s 5mm x 5.5mm footprint enables engineers to shrink the size of their power supply by 30% while reducing power loss by 50% when compared to similar competing modules. The new power module comes with a single thermal pad to optimize heat transfer, enabling engineers to simplify board mounting and layout.

The TPSM53604 can operate in ambient temperatures as high as 105°C to support rugged applications in factory automation and control, grid infrastructure, test and measurement, industrial transport, and aerospace and defense. By pairing the TPSM53604 with a compact step-down module such as the TPSM82813 and TPSM82810, engineers can create a complete power solution from a 24V input down to the point of load, while minimizing design time and effort, says TI.

Its total area of 85 mm2 for a single-sided layout is the smallest solution for common 24V, 4A industrial applications, says TI. The standard QFN footprint helps simplify design and thereby reduce time to market. 42% of the TPSM53604’s QFN package footprint touches the board, enabling more efficient heat transfer compared to competing ball-grid-array (BGA) packages. In addition, the module’s buck converter integrates MOSFETs with low drain-source on resistance (RDS(on)) to enable conversion efficiency of 90% at 24V to 5V.

The TPSM53604’s integrated high-frequency bypass capacitors and lack of bond wires help engineers meet the electromagnetic interference (EMI) standard defined by CISPR (Comité International Spécial des Perturbations Radioélectriques) 11 Class B limits.

The TPSM53604 is now available from TI and authorized distributors in a 5mm x 5.5mm QFN package. Pricing starts at US$3.65 in 1,000-unit quantities. The TPSM53604 evaluation module is available on TI.com for US$49. Production quantities of the TPSM53602 (2-A) and TPSM53603 (3-A) modules are also now available from TI and authorized distributors. Pricing starts at US$2.64 and US$3.21 in 1,000-unit quantities, respectively.

Texas Instruments | www.ti.com

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