Intersil – ZL8800: Dual Channel/Dual Phase PMBus™ ChargeMode™ Control DC/DC Digital Controller


The ZL8800 is a dual channel/dual phase controller that utilizes a ChargeMode control loop technology to deliver fast transient response without the need for compensation, reducing design time. It provides best in class transient response for digital point-of-loads (POLs), saving on output capacitance and board space, important benefits for the advanced power systems found in the latest generation of base-stations, routers, and similar infrastructure designs. With the fully digital ChargeMode control, the ZL8800 will respond to a transient load step within a single switching cycle. This unique compensation-free modulation technique allows designs to meet transient specifications with minimum output capacitance thus saving cost and board space.


  • 1% output voltage accuracy over line, load and temperature
  • Proprietary single wire digital-DC (DDC) serial bus
  • Cycle by cycle inductor peak current protection
  • 10-bit average output current measurement with adjustable gain
  • 10-bit monitor ADC
  • 200kHz to 1.33MHz switching frequency range
  • Tracking of an external power supply
  • Digital fault protection
  • Non-volatile memory for storing operating parameters and fault events
  • 1k MSRP: $4.90 US