Smallest 36-V, 4-A power module cuts solution size by 30%

TI offers high efficiency and low thermal resistance for industrial applications with a new power module in a QFN package

Texas Instruments (TI) introduced the industry’s smallest 36-V, 4-A power module in a quad flat no-lead (QFN) package. The TPSM53604 DC/DC buck module’s 5-mm-by-5.5-mm 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.

Efficiency vs. Output Current.

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 24-V input down to the point of load, while minimizing design time and effort.

Key benefits and features of the TPSM53604

• Shrink and simplify the power solution:
  Its total area of 85 mm² for a single-sided layout is the smallest solution for common 24-V, 4-A industrial applications. The standard QFN footprint helps simplify design and thereby reduce time to market.
   
• Efficiently dissipate heat at high ambient temperatures:
  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 24 V to 5 V.
   
• Easily meet EMI standards:
  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.

Package, availability and pricing

The TPSM53604 is now available from TI and authorized distributors in a 5-mm-by-5.5-mm 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.

The TPSM53604EVM Evaluation Module.