The TPSM63606 is an easy-to-use, synchronous buck DC/DC power module designed for a wide variety of applications where reliability, small solution size, and low EMI signature are of paramount importance. With integrated power MOSFETs, a buck inductor, and PWM controller, the TPSM63606 operates over an input voltage range of 3 V to 36 V with transients as high as 42 V. The module delivers up to 6-A DC load current with high conversion efficiency and ultra-low input quiescent current in a very small solution footprint. Control loop compensation is not required, reducing design time and external component count.

With a programmable switching frequency from 200 kHz to 2.2 MHz using its RT pin or an external clock signal, the TPSM63606 incorporates specific features to improve EMI performance in noise-sensitive applications:

• An optimized package and pinout design enables a shielded switch-node layout that mitigates radiated EMI.
• Parallel input and output paths with symmetrical capacitor layouts minimize parasitic inductance, switch-voltage ringing, and radiated field coupling
• Pseudo-random spread spectrum (PRSS) modulation in the TPSM63606S reduces peak emissions
• Clock synchronization and FPWM mode enable constant switching frequency across the load current range.
• Integrated power MOSFETs with enhanced gate drive control enable low-noise PWM switching.

Together, these features significantly reduce EMI filtering requirements, while helping to meet CISPR 11 and CISPR 32 Class B EMI limits for conducted and radiated emissions.

The TPSM63606 module also includes inherent protection features for robust system requirements:

• An open-drain PGOOD indicator for power-rail sequencing and fault reporting
• Precision enable input with hysteresis, providing:
  • Programmable line undervoltage lockout (UVLO)
  • Remote ON/OFF capability
• Internally fixed output-voltage soft start with monotonic start-up into prebiased loads
• Hiccup-mode overcurrent protection with cycle-by-cycle peak and valley current limits
• Thermal shutdown with automatic recovery.

Leveraging a pin arrangement designed for simple layout that requires only a few external components, the TPSM63606 is specified to maximum ambient and junction temperatures of 105°C and 125°C, respectively.