uP1911R
uPI Semiconductor
2 to 4 Phase PWM Extender for Multiphase Synchronous Buck Converter
Package Type: WQFN3x3
The uP1911R is a high precision sequence array, which is intended for operation phase number extension in multiphase synchronous-rectified buck converter. It consists of three individual sequence circuits to support up to 2 to 4 phase extension application. This part has 4 PWM outputs for external MOSFET drivers, and 4 ISEN inputs. With this phase extender, a 2-phase buck PWM controller is able to control a 4-phase synchronous buck regulator. This device has an internal LDO that regulates 12V input to a 5.2V output as the power supply of control logic. Designed with 12V CMOS process, the uP1911R provides high switching speed and low power dissipation. The uP1911R is available in WQFN3x3 - 16L package.
Data sheet
