SNVSB77B December 2019 – September 2021 TPSM53603
The TPSM53603 is a full-featured, 36-V input, 3-A, synchronous step-down converter with PWM, MOSFETs, shielded inductor, and control circuitry integrated into a low-profile, over-molded package. The device integration enables small designs while providing the ability to adjust key parameters to meet specific design requirements. The TPSM53603 provides an output voltage range of 1 V to 7 V. An external resistor divider is used to adjust the output voltage to the desired value. The device provides accurate voltage regulation over a wide load range by using a precision internal voltage reference. Input undervoltage lockout is internally set at 3.55 V (typical), but can be adjusted upward using a resistor divider on the EN pin of the device. The EN pin can also be pulled low to put the device into standby mode to reduce input current draw. A power-good signal is provided to indicate when the output is within its nominal voltage range. Thermal shutdown and current limit features protect the device during an overload condition. A 15-pin, QFN package that includes exposed bottom pads provides a thermally enhanced solution for space-constrained applications.