Integrated power modules offer advantages over less expensive, discrete regulators. This is especially true for designs with many power rails and where high current is involved. Power modules provide validated solutions that simplify overall system design by reducing component count and qualification. They are typically optimized for EMI and thermal performance.
Texas Instruments’ TPSM82480 DC/DC module (see figure) integrates power metal-oxide semiconductor field-effect transistors (MOSFETs) and shielded inductors in an ultra-small 7.9- by 3.6- by 1.5-mm package. The small footprint is useful in space- and height-constrained applications like point-of-load telecommunications and test-and-measurement power supplies.
Texas Instruments’ latest, compact DC-DC power module can handle 6A with only two external capacitors.
The synchronous step-down DC-DC converter output current is up to 6 A, provided by two phases that handle up to 3 A each. The two run out-of-phase, thereby significantly reducing pulse current noise. The TPSM82480 can automatically enter a power save mode to maintain high efficiency with very light loads. This is done using the automatic phase adding and shedding feature for both or only one phase based on actual load. The power save mode can be disabled.
The input voltage range is 2.4 to 5.5 V. This allows operation with supply sources that are typically 3.3-V or 5-V. It can handle backup circuits dropping as low as 2.4 V. The power module is able to operate in 100% duty cycle mode. The system has undervoltage lockout and over temperature protection.
The TPSM82480 provides a Power Good signal as well as an adjustable soft start. The device features a Thermal Good signal to indicate excessive internal temperature. The output voltage can also be changed to a preselected value using the VSEL pin.