Step-down converter handles 40A continuous output

Article By : Susan Nordyk

The TPS548D22 converter’s D-CAP3 control mode supports large bulk capacitors and/or small MLCCs without external loop compensation.

Texas Instruments’ TPS548D22 40A, 16VIN synchronous buck DC/DC converter provides true differential remote-voltage sensing to improve load regulation and overall system accuracy. The converter packs integrated MOSFETs with a high-side on-resistance of 2.9mΩ and a low-side on-resistance of 1.2mΩ in its small PowerStack package, increasing power density and system reliability in space-constrained applications.

The TPS548D22 converter’s D-CAP3 control mode supports large bulk capacitors and/or small MLCCs without external loop compensation. In addition, the part offers adaptive on-time control with four selectable frequency settings: 425kHz, 650kHz, 875kHz, and 1.05MHz. Device specifications include a conversion input voltage range of 1.5V to 16V, an input bias voltage range of 4.5V to 22V, an output voltage range of 0.6V to 5.5V, and continuous output current of 40A. Reference voltage accuracy over temperature is 0.5%.

Housed in a 40-pin, 5mm × 7mm × 1.5mm PowerStack QFN package, the TPS548D22 costs $4.19 each in lots of 1,000 units.

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