The ISL71043M and ISL71041M are PWM controllers suitable for a wide range of power conversion applications including boost, flyback, and isolated output configurations. Fast signal propagation and output switching characteristics make these ideal products for existing and new designs.

Features include up to 13.2V operation, 2.9mA operating current, 90µA typical start-up current, adjustable operating frequency to 1MHz and, 1A current drive capability with 35ns rise and 29ns fall times.
The ISL71041M and ISL71043M are available in an 8 LD TDFN package and the ISL71043M is also available in an 8 LD SOIC package. Both packages are specified across the extended temperature range of -55°C to +125°C.


  • 1A MOSFET gate driver
  • 90µA typical start-up current, 125µA maximum
  • Moisture Sensitivity Level (MSL) rating is 1
  • 35ns propagation delay current sense to output
  • Fast transient response with Peak Current mode control
  • 9V to 13.2V operation
  • Adjustable switching frequency to 1MHz
  • 35ns rise time and 29ns fall time with 1nF output load
  • Trimmed timing capacitor discharge current for accurate dead time/maximum duty cycle control
  • 1.5MHz bandwidth error amplifier
  • Tight tolerance voltage reference over line, load, and temperature±3% current limit threshold
  • Ni/Pd/Au-Ag lead finish (Tin (Sn) free)
  • Characterized radiation levels
    • Low Dose Rate (LDR) (0.01rad(Si)/s) : 30krad(Si)
    • Single event burnout LET 43MeV•cm2/mg


  • Current mode switching power supplies
  • Isolated buck and flyback regulators
  • Boost regulators
  • Direction and speed control in motors
  • Control of high current FET drivers


Title language Type Format File Size Date
star ISL71043M, ISL71041M Datasheet Rev.5.00 Datasheet PDF 1.34 MB
AN9867: End of Life Derating: A Necessity or Overkill Application Note PDF 338 KB
Intersil Space Products Brochure Brochure PDF 3.16 MB


memoryBoards & Kits

Part Number Title Type Company
ISL71043MEVAL1Z Radiation Tolerant Single-Ended Current Mode PWM Controller Evaluation Board Evaluation Renesas

printNews & Additional Resources