Power modules eliminate input and output capacitors, suit space-limited designs

The SWIFT TPSM84A21 and TPSM84A22 dc/dc modules integrate power MOSFETs, shielded inductors, input and output capacitors, and passives into a 2.3-mm-high package. The solution is offered in a 9 x 15-mm module with a single external voltage-setting resistor that makes up a complete solution footprint of 11 x 15 mm. In addition, it provides 1% overshoot in transient conditions without special magnetics or additional capacitors.

By using the step-down power module together with TI’s WEBENCH Power Designer, engineers can get their space-constrained point-of-load (POL) telecom, networking, and test-and-measurement power-supply designs to market faster.

Unlike other 10-A step-down modules available today, the highly integrated TPSM84A21 and TPSM84A22 require just one external voltage-setting resistor for a complete 12-V step-down power solution. For an application such as powering tightly regulated field-programmable gate array (FPGA) rails, a typical 10-A module would require up to 16 external capacitors. In comparison, the TPSM84A21 provides low-output ripple due to the 4-MHz switching frequency and integrated 185 μF of output capacitance, which maintains regulation accuracy without any external capacitors. The TPSM84A21, with a voltage output of 0.55 to 1.35 V, and the TPSM84A22, with a voltage output of 1.2 to 2.0 V, are available in volume now.