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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
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 |

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

by Circuit Cellar Staff time to read: 1 min