Synchronous step-down converter provides ease of use

The Texas Instruments LMR36520 regulator is an easy-to-use, synchronous, step-down DC-DC SIMPLE SWITCHER converter. With integrated high-side and low-side power MOSFETs, output current up to 2A is produced over a broad input voltage range of 4.2V to 65V. The transient tolerance that rises to 70V reduces the solution size and cost to guard against overvoltages and satisfies the surge immunity requirements of IEC 61000-4-5.

The device employs peak-current mode control to give optimal efficiency and output voltage accuracy. Precision enable provides flexibility by facilitating a direct connection to the wide input voltage or precise control over device start-up and shutdown. The power-good flag, with built-in filtering and delay, gives a true indication of system status, removing the necessity for an external supervisor.

Integration and internal compensation removes many external components and gives a pinout created for a simple PCB layout. The feature set of the device is intended to simplify implementation for an extensive range of end equipment. The device is pin-to-pin compatible with the LMR36510 (65V, 1A) and LMR33610, LMR33620, LMR33630 and LMR33640 (36V, 1A, 2A, 3A, 4A), completing the newest family of SIMPLE SWITCHER converters. This extends the ease of use and scalability of wide Vin converters across various commonly used voltage and current ratings without needing to redesign the board layout. Subsequently, the overall cost, design effort and time to market are optimised.

The device is provided in an eight-pin HSOIC package.