The ISL6729 pulse width modulating (PWM) current mode controller is designed for power conversion applications that are based on a microcontroller, or other device, which can generate a digital clock signal at the desired switching frequency. Similar to the ISL684x family of products, the ISL6729 provides the basic current mode PWM control features, but eliminates the error amplifier, the oscillator, and the reference. An external clock signal applied to the oscillator input provides the time base and sets the maximum duty cycle. The reduced feature set is ideal for those applications where a microcontroller is available to provide the monitor and control functions. The analog PWM provides the cycle-by-cycle peak-current mode control, leaving the monitor and control overhead to the microcontroller.


  • 5V operation
  • 1A MOSFET gate driver
  • 400μA startup current
  • 30ns propagation delay current sense to output
  • Fast transient response with peak-current mode control
  • Switching frequency to 2MHz
  • 20ns rise and fall times with 1nF output load
  • Maximum duty cycle determined by clock input duty cycle
  • Tight tolerance current limit threshold
  • Pb-free (RoHS compliant)


  • Telecom and Datacom Power
  • Wireless Base Station Power
  • File Server Power
  • Industrial Power Systems
  • PC Power Supplies
  • Isolated Buck and Flyback Regulators
  • Boost Regulators

Product Options

Part Number Part Status Pkg. Type Carrier Type MOQ Buy Sample
Active SOICN Tube 14700
Active SOICN Reel 12500

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
ISL6729 Datasheet Datasheet PDF 480 KB
Application Notes & White Papers
AN1684: Nonideality of Ground Application Note PDF 397 KB
AN1681: Grounding Techniques Application Note PDF 509 KB
PCN12068 - SOIC w/ Copper Bond Wire @ ASECL as Alternate Assembly Site Product Change Notice PDF 108 KB
PLC14051A - Product Discontinuance / Obsolescence Notification Product Life Cycle Notice PDF 124 KB