The ZL8801 is a dual phase digital DC/DC controller. Up to four ZL8801s (8 phases) can be operated in parallel to provide additional output current. The ZL8801 supports a wide range of output voltages (0. 54V to 5. 5V) operating from input voltages as low as 4. 5V up to 14V. With its fully digital ChargeMode™ Control loop the ZL8801 can 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. Intersil’s proprietary single wire DDC (Digital-DC™) serial bus enables the ZL8801 to communicate between other Intersil digital power ICs. By using the DDC, the ZL8801 achieves complex functions such as inter-IC phase current balancing, sequencing and fault spreading, eliminating complicated power supply managers with numerous external discrete components. The ZL8801 features cycle-by-cycle overcurrent protection and protection for overvoltage, undervoltage, over-temperature and MOSFET driver under and overvoltage protection. A snapshot parametric capture feature allows users to take a snapshot of operating and fault data during normal or fault conditions. Integrated Low Drop-Out (LDO) regulators allow the ZL8801 to be operated from a single input supply eliminating the need for additional linear regulators. A dedicated 5V VDRV LDO output can be used to power external drivers or DrMOS devices. With full PMBus™ compliance, the ZL8801 is capable of measuring and reporting input voltage, input current, output voltage, output current as well as the device's internal temperature, an external temperature and an auxiliary voltage input.


  • Unique compensation-free design – always stable
  • Output voltage range: 0.54V to 5.5V
  • Input voltage range: 4.5V to 14V
  • 1% output voltage accuracy over line, load and temperature
  • Charge mode control achieves fast transient response, reduced output capacitance and provides output stability without compensation
  • Single 2-phase output, up to 8 phases with multiple devices
  • Switching frequency range 200kHz to 1.33MHz
  • Proprietary single wire DDC (Digital-DC) serial bus enables voltage sequencing and fault spreading with all other Intersil digital power ICs
  • Tracking of an external power supply in the single 2-phase configuration
  • Cycle-by-cycle inductor peak current protection
  • Digital fault protection for output voltage UV/OV, input voltage UV/OV, temperature and MOSFET driver voltage
  • 10-bit cycle-by-cycle average output current measurement with adjustable gain settings for sensing with high current, low DCR inductors
  • 10-bit monitor ADC measures input voltage, input current, output voltage, internal, external temperature, driver voltage
  • Configurable to use standalone MOSFET drivers or integrated driver-MOSFET (DrMOS) devices
  • Nonvolatile memory (NVRAM) for storing operating parameters and fault events.
  • PMBus™ compliant


PDF 3.50 MB Datasheet
PDF 5.51 MB 日本語 Brochure
PDF 257 KB Manual - Development Tools
PDF 4.68 MB Guide
PDF 124 KB Product Change Notice
PDF 714 KB Guide
PDF 194 KB Other
PDF 693 KB Manual - Hardware
PDF 509 KB Application Note
PDF 397 KB Application Note
10 items

Design & Development

Software & Tools

Software & Tools

Software title
Software type
PowerNavigator Software
Renesas' PowerNavigator™ software allows simple configuration and monitoring of multiple Digital-DC devices using a PC with a USB interface.
Monitor Debugger/RAM Monitor Renesas
1 item

Software Downloads

ZIP 120.25 MB Software & Tools - Other
ZIP 96.49 MB Software & Tools - Software
ZIP 54.93 MB Library
ZIP 119.19 MB Library
ZIP 59.25 MB Library
ZIP 435 KB Library
ZIP 1.75 MB Library
ZIP 166 KB Library
8 items

Boards & Kits

Boards & Kits


Selecting between the ZL8800 and ZL8801

Identifying the differences between the ZL8800 and ZL8801 dual phase PMBus™ ChargeMode™ control dc/dc digital controllers.


The ZL8801 is part of our fourth generation family of digital power controllers. Also in that family is the ZL8800. Selecting between the two is relatively simple, as the chart shows.

The ZL8800 and ZL8801 both offer ChargeMode control. The ZL8800, however, offers dual output or dual phase operation. The ZL8801 offers only dual phase, but it adds DDC current share. With DDC current share, you can share multiple ZL8801 controllers, for up to an eight-phase design.

The recommended current range for the ZL8800 is between 5A and 60A. The ZL8801 has a recommended current range of 40A all the way up to 300A plus. The actual current is dependent on the power stage you use, however, these are just recommendations.

Both parts are offered in a 7mm x 7mm QFN package. Both the ZL8800 and ZL8801 are compensation free, based on our ChargeMode control architecture.

Unlike an analog control loop, a fully digital control loop digitizes the feedback voltage and handles all control and compensation in a digital delay.