The ZL2004 is a digital DC-DC controller designed to work with the ZL1505 MOSFET driver IC. Current sharing allows multiple devices to be connected in parallel to source loads with very high current demands. Adaptive performance optimization algorithms improve power conversion efficiency across the entire load range. Zilker Labs Digital-DC™ technology enables a blend of power conversion performance and power management features. The ZL2004 is designed to be a flexible building block for DC power and can be easily adapted to designs ranging from a single-phase power supply operating from a 4. 5 V input to a multi-phase supply operating from a 12V input. The ZL2004 eliminates the need for complicated power supply managers as well as numerous external discrete components. All operating features can be configured by simple pin-strap/resistor selection or through the SMBus™ serial interface. The ZL2004 uses the PMBus™ protocol for communication with a host controller and the Digital-DC bus for communication between other Zilker Labs devices.


  • Power Conversion
  • Efficient synchronous buck controller
  • Adaptive performance optimization algorithms
  • 4.5 V to 14 V input range
  • 0.54 V to 4 V output range (with margin)
  • ±1% VOUT set-point accuracy
  • Fast load transient response
  • Current sharing and phase interleaving
  • Digitally adjustable current sense range
  • Snapshot™ parameter capture
  • RoHS compliant (5 x 5 mm) QFN package
  • Power Management
  • Digital soft start/stop
  • Precision delay and ramp-up
  • Power good/enable
  • Voltage tracking, sequencing and margining
  • Voltage/current/temperature monitoring
  • SMBus communication (PMBus compliant)
  • Output voltage and current protection
  • Internal non-volatile memory (NVM)


  • Servers/storage equipment
  • Telecom/datacom equipment
  • Power supplies (memory, DSP, ASIC, FPGA)

Product Options

Part Number Part Status Pkg. Type Carrier Type MOQ Buy Sample
Active TQFN Tube 60
Active TQFN Reel 100
Active TQFN Reel 1000

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
ZL2004 Datasheet Datasheet PDF 1.66 MB
User Guides & Manuals
PMBus Interface Install Guide - Win7 x86 and x64 Manual PDF 693 KB
ZLUSBREF01 User Guide Manual PDF 704 KB
ZL2004EV1 User Guide Manual PDF 739 KB
Application Notes & White Papers
Five Easy Steps to Create a Multi-Load Power Solution White Paper PDF 846 KB
AN2018: The ZL_PMBus API Programmer's Guide Application Note PDF 805 KB
AN2035: Compensation Using CompZL Application Note PDF 807 KB
AN2037: Zilker Labs System Design Checklist Application Note PDF 214 KB
AN2032: NLR Configuration for DDC Products Application Note PDF 573 KB
AN2015: Current Protection and Measurement Application Note PDF 767 KB
AN2028: Loading Configuration Files in a Manufacturing Environment Application Note PDF 528 KB
AN2010: Thermal and Layout Guidelines for Digital-DC Products Application Note PDF 1.43 MB
AN2030: Configuring a Device via the SMBus Application Note PDF 686 KB
AN2026: PowerNavigator User Guide Application Note PDF 1.08 MB
AN2031: Writing Configuration Files for Intersil Digital Power Application Note PDF 1.01 MB
AN2036: ZLHLD Generator User Guide Application Note PDF 213 KB
AN2029: ConfigZL User Guide Application Note PDF 306 KB
AN2027: CompZL User Guide Application Note PDF 559 KB
AN2040: Power Design with Digital-DC Devices Application Note PDF 1.74 MB
AN2033: Intersil PMBus Command Set for Digital-DC Products Application Note PDF 1.90 MB
AN2034: Configuring Current Sharing on the ZL2004 and ZL2006 Application Note PDF 1.36 MB
AN1684: Nonideality of Ground Application Note PDF 397 KB
AN1681: Grounding Techniques Application Note PDF 509 KB
PCN16089A - Alternate assembly facility of the listed Intersil DFN / QFN packaged products Product Change Notice PDF 124 KB
PCN14010 - Alternate Manufacturing Facilities for Assembly of the Listed Intersil QFN Packaged Products - Amkor (ATP), Muntinlupa City, Philippines Product Change Notice PDF 221 KB
PMBus Conversion Software Tool Library ZIP 54.93 MB
ZLHLD Software v2.9 Library ZIP 119.19 MB
CompZL Software v1.5.1 Library ZIP 59.25 MB
PowerPilot Software GUI Library ZIP 435 KB
USB Drivers for the ZLUSBEVAL1Z (Windows XP/Vista) Library ZIP 166 KB
USB Drivers for the ZLUSBEVAL1Z (Windows 7) Library ZIP 1.75 MB
Digital-DC Frequently Asked Questions (FAQ) Other PDF 194 KB

Boards & Kits

Part Number Title Type Company
ZLUSBEVAL1Z USB to SMBus Adapter and Cable Evaluation Renesas