65V, 3A step-down buck power module with exposed inductor in an eQFN package

The TPSM656x0 is a family of 3A, 2A, 1A, 65V (70V tolerant) input synchronous step-down DC/DC power module that combines power MOSFETs, integrated inductor, and passives in a compact and easy-to-use 5.8mm × 5.2mm × 2.93mm, 19-pin enhanced HotRod QFN package. With the pin-selectable fixed-output voltages of 3.3V and 5V and adjustable output voltage from 1V to 24V, the TPSM656x0 is designed with ZEN 1 technology to quickly and easily implement a low-EMI design in a small PCB footprint. The module only requires the input and output filter capacitors to finish the design and eliminates the magnetics and compensation part selection from the design process. A pin-selectable ±5% or ±10% dual-random spread spectrum (DRSS) significantly reduces peak emissions through a combination of triangular and pseudo-random modulation while keeping output voltage ripple very low.

Although designed for small size and simplicity in space-constrained applications, the TPSM656x0 module offers many features for robust performance. The current-mode control architecture with a 30ns typical minimum on-time allows high conversion ratios at high frequencies coupled with a fast transient response and excellent load and line regulation. The precision EN feature allows precise control of the device during start-up and shutdown. An open-drain PGOOD output provides a true indication of the output voltage status. The TPSM656x0 includes accurate overcurrent and temperature protections, making the TPSM656x0 an excellent device for powering a wide range of industrial applications. The MODE/ SYNC pin enables seamless transition between FPWM and AUTO mode with a no-load standby quiescent current of 2.1µA (typical), making sure of high efficiency and remarkable transient response for the entire load-current range.