The TPSM41625 is a full-featured, 4-V to 16-V input, 25-A, synchronous step-down converter with PWM, MOSFETs, inductor, and control circuitry integrated into a QFN package. The device integration enables small designs, while still leaving the ability to adjust key parameters to meet specific design requirements. The TPSM41625 provides an output voltage range of 0.6 V to 7.1 V, with a selectable internal reference form 0.6 V to 1.1 V, for greater accuracy. An external resistor is used to adjust the output voltage to the desired output. The switching frequency is also adjustable by using an external resistor or a synchronization clock to accommodate various input and output voltage conditions and to optimize efficiency. Applications requiring increased current can benefit from the stackability (parallel outputs and phase-interleaving) of the TPSM41625 device.

The TPSM41625 has been designed for safe start-up into pre-biased loads. The EN pin has an internal pullup current source that can be used to adjust the input voltage undervoltage lockout (UVLO) with two external resistors. In addition, the internal pullup current of the EN pin allows the device to operate with the EN pin floating. The EN pin can also be pulled low to put the device in standby mode to reduce input quiescent current. The device provides a power-good (PGOOD) signal to indicate when the output voltage is within regulation. Thermal shutdown and current limit features protect the device during an overload condition. A 69-pin QFN package that includes exposed bottom pads provides a thermally enhanced solution for space-constrained applications.