The XL4015 power module is a DC to DC step-down (BUCK) power module that operates at a switching frequency of 180kHz. In such high frequency, it provides smaller sized filter components compared with low frequency switching regulators.
CS1411 is a 1.5A, 260 kHz and 520 kHz, Low Voltage Buck Regulators with External Bias or Synchronization Capability. The input voltage range for CS51411 is from 4.5V to 40V. The CS51411 is functionally pin−compatible with the LT1375.