SLUU180B January 2022 – February 2022 TPS40070 , TPS40071
The TPS40070/TPS40071 synchronous buck controller family offers a variety of user-programmable functions including the following:
The controller operates with fixed frequency voltage mode control with an input voltage feedforward control input, which improves performance in applications that have a variable input source. The TPS40071 is selected in the EVM because it operates in source-sink mode over the entire operating range.
The TPS40071 incorporates internal gate drivers for external N-channel MOSFETs in the high-side switch and low-side synchronous rectifier locations. The MOSFET drivers utilize TI’s proprietary Predictive Gate Drive technique, which works to minimize the body diode conduction interval to reduce undesired power loss. The PowerPAD™ package allows the regulator bias power and the gate drive power to be safely dissipated without raising the junction an excessive amount. The high-side current limit/short circuit protection senses the voltage drop across the top-side MOSFET and compares it to a programmable reference to terminate output pulses on a pulse by pulse basis.
The TPS40071EVM−001 highlights the small size, highly efficient solutions that can be attained using theTPS40071 controller. This user guide provides the collateral necessary to evaluate the TPS40071 in a typical application. The collateral includes the following:
The TPS40071EVM−001 offers the following performance features: