TI: tiny 12-V, 10-A DC/DC step-down power solution
Texas Instruments introduced a pair of 12-V, 10-A, 4-MHz step-down power modules that provide a power management solution that is 20 percent smaller than any other 10-A power module-based solution available today. The easy-to-use SWIFT TPSM84A21 and TPSM84A22 DC/DC modules integrate power MOSFETs, shielded inductors, input and output capacitors, and passives into a tiny, low profile footprint. In addition, it provides industry-leading performance, with as little as 1 percent 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 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 FPGA rails, a typical 10-A module would require up to 16 external capacitors. In comparison, the TPSM84A21 provides ultra-low output ripple due to the very high 4-MHz switching frequency and integrated 185 microfarads of output capacitance, which maintains regulation accuracy without any external capacitors.
A 9 x15-mm module and a single external voltage-setting resistor make up a complete solution footprint of 11x 15 mm. Measuring 2.3 mm in height, the small size, weight and bill of materials enable placement of the complete solution on the back side of a printed circuit board. The TPSM84A21 with a voltage output of 0.55 to 1.35 V and the TPSM84A22 with a voltage output of 1.2 V to 2.0 V are available in volume now.