The ZL2105 is an innovative power conversion and management IC that combines an integrated synchronous step-down DC-DC converter with key power management functions in a small package, resulting in a flexible and integrated solution. Zilker Labs Digital-DC™ technology enables unparalleled power management integration while delivering industry-leading performance in a tiny footprint. The ZL2105 can provide an output voltage from 0. 6 V to 5. 5 V from an input voltage between 4. 5 V and 14 V. Internal 4. 5 A low RDS(ON) synchronous power MOSFETs enable the ZL2105 to deliver continuous loads up to 3 A with high efficiency, and an internal Schottky bootstrap diode further reduces discrete component count. The ZL2105 also supports phase spreading for reduced system capacitance. Power management features such as digital soft-start delay and ramp, sequencing, tracking, and margining can be configured by simple pin-strapping or through an on- chip serial port. The ZL2105 uses standard PMBus™ protocol for communicating with other devices to provide intelligent system power management.


  • Power Conversion
  • High efficiency
  • 3 A continuous output current
  • Integrated MOSFET switches
  • 4.5 V to 14 V input range
  • 0.54 V to 5.5 V output range (with margin)
  • ±1% output voltage accuracy
  • 200 kHz to 2 MHz switching frequency
  • Supports phase spreading
  • Small footprint (6 x 6 mm QFN package)
  • Power Management
  • Digital soft start/stop
  • Precision delay and ramp-up
  • Power good/enable
  • Voltage tracking, sequencing, and margining
  • Output voltage/current monitoring
  • Thermal monitor w/ shutdown
  • Non-volatile memory
  • I2C/SMBus™ communication bus
  • PMBus compatible


  • Telecom and storage equipment
  • Digital set-top box
  • Industrial supplies
  • 12 V distributed power systems
  • Point of load converters

Product Options

Part Number Part Status Pkg. Type Carrier Type MOQ Buy Sample
Active QFN Tube 50
Active QFN Reel 100
Active QFN Reel 1000

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
ZL2105 Datasheet Datasheet PDF 1.65 MB
User Guides & Manuals
PMBus Interface Install Guide - Win7 x86 and x64 Manual PDF 693 KB
ZL2105EV2 User Guide Manual PDF 1.26 MB
ZLUSBREF01 User Guide Manual PDF 704 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
AN2016: Digital-DC Control Loop Compensation Application Note PDF 621 KB
AN2023: Voltage Tracking with the ZL2005 Application Note PDF 262 KB
AN2013: Zilker Labs PMBus Command Set Application Note PDF 441 KB
AN2028: Loading Configuration Files in a Manufacturing Environment Application Note PDF 528 KB
AN2014: System Design Using Digital-DC Devices Application Note PDF 589 KB
AN2022: Autonomous Sequencing Technology Application Note PDF 232 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
AN1681: Grounding Techniques Application Note PDF 509 KB
AN1684: Nonideality of Ground Application Note PDF 397 KB
PCN16089A - Alternate assembly facility of the listed Intersil DFN / QFN packaged products Product Change Notice PDF 124 KB
PCN11032 - Data Sheet Specification Change for Intersil Product ZL2105ALNF* Product Change Notice PDF 88 KB
PCN11018 - Alternate Manufacturing Sites for Intersil ZL2005*, ZL2006*, ZL2008, ZL2105*, and ZL6100* Products - Jazz Semiconductor Newport Beach, CA and STATS ChipPAC Malaysia Product Change Notice PDF 170 KB
PCN11007 - Packing Method Change for Intersil ZLxxxx QFN Packaged Products Product Change Notice PDF 131 KB
PCN10048 - Alternate Manufacturing Site for the Listed Intersil Pb-Free QFN Packaged Products - STATS ChipPAC Malaysia Product Change Notice PDF 73 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 7) Library ZIP 1.75 MB
USB Drivers for the ZLUSBEVAL1Z (Windows XP/Vista) Library ZIP 166 KB
PA14042 - Minimum Line Quantity Change Product Advisory PDF 363 KB
Digital-DC Frequently Asked Questions (FAQ) Other PDF 194 KB

Boards & Kits

Part Number Title Type Company
ZL2105EVK2 3A Integrated Digital DC/DC Converter Evaluation Board Evaluation Renesas
ZLUSBEVAL1Z USB to SMBus Adapter and Cable Evaluation Renesas