The ISL85001 is a high-performance, simple output controller that provides a single, high frequency power solution for a variety of point-of-load applications. The ISL85001 integrates a 1A standard buck PWM controller and switching MOSFET. The PWM controller in the ISL85001 drives an internal switching N-channel power MOSFET and requires an external Schottky diode to generate an output voltage from 0. 6V to 19V. The integrated power switch is optimized for excellent thermal performance for up to 1A of output current. The standard buck input voltage range supports a fixed 5V or variable 5. 5V to 25V range. The PWM regulator switches at a fixed frequency of 500kHz and utilizes simple voltage mode control with input voltage feed-forward to provide flexibility in component selection and minimize solution size. Protection features include overcurrent, undervoltage and thermal overload protection integrated into the IC. The ISL85001 power-good signal output indicates loss of regulation on the PWM output. ISL85001 is available in a small 4mmx3mm Dual Flat No-Lead (DFN) package.


  • Standard buck controller with integrated switching power MOSFET
  • Integrated boot diode
  • Input voltage range
  • Fixed 5V ±10%
  • Variable 5.5V to 25V
  • PWM output voltage adjustable from 0.6V to 19V with continuous output current up to 1A
  • ±1% VFB tolerance
  • Voltage mode control with voltage feed-forward
  • Fixed 500kHz switching frequency
  • Externally adjustable soft-start time
  • Output undervoltage protection
  • Enable inputs
  • PGOOD output
  • Overcurrent protection
  • Thermal overload protection
  • Internal 5V LDO regulator
  • Pb-free (RoHS compliant)


  • General Purpose
  • WLAN Cards-PCMCIA, Cardbus32, MiniPCI Cards-Compact
  • Flash Cards
  • Hand-Held Instruments
  • LCD Panel
  • Set-top Box

Product Options

Part Number Part Status Pkg. Type Carrier Type MOQ Buy Sample
Active DFN Tube 75
Active DFN Reel 6000

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
ISL85001 Datasheet 日本語 Datasheet PDF 1.17 MB
User Guides & Manuals
ISL85001EVAL1Z User Guide Manual PDF 488 KB
Application Notes & White Papers
Five Easy Steps to Create a Multi-Load Power Solution White Paper PDF 846 KB
AN9208: High Frequency Power Converters Application Note PDF 592 KB
AN1488: Fixed DC/DC Regulator Output Margining Using Digitally Controlled Potentiometer Application Note PDF 249 KB
AN1684: Nonideality of Ground Application Note PDF 397 KB
AN1681: Grounding Techniques Application Note PDF 509 KB
AN9210: A New Pspice Subcircuit For The Power MOSFET Featuring Global Temperature Options Application Note PDF 650 KB
AN9209: A Spice-2 Subcircuit Representation For Power MOSFETs Using Empirical Methods Application Note PDF 387 KB
AN7244: Understanding Power MOSFETs Application Note PDF 349 KB
PCN15046 - Wafer Fabrication Site Change for Listed Intersil Products - Global Foundry P6 Process transfer to Palm Bay - Phase II Product Change Notice PDF 398 KB
PCN10055 - Alternate Bond Wire Material for Assembly of the Listed Intersil DFN/QFN Packaged Products - STATS ChipPAC Malaysia Product Change Notice PDF 248 KB
TB417: Designing Stable Compensation Networks for Single Phase Voltage Mode Buck Regulators Other PDF 562 KB

Boards & Kits

Part Number Title Type Company
ISL85001EVAL1Z 1A Standard Buck PWM Regulator Evaluation Board Evaluation Renesas