Special function converters, Special data function, digital to analog converter

 The AP64500 and AP64350 devices are easily used by minimizing the external component count due to its adoption of peak current mode control. The AP64500 and AP64350 designs are optimized for Electromagnetic Interference (EMI) reduction. 

https://www.futureelectronics.com/npi/diodes-ap64350-ap64500-synchronous-buck-converters