The ISL70003ASEH is an improved version of the ISL70003SEH regulator with both tighter load regulation (<0.3% typical) and a higher output current rating of 9A. Operating over an input voltage range of 3.0V to 13.2V with integrated low rDS(ON) MOSFETs makes this monolithic solution highly efficient. Also, a tightly regulated output voltage is possible, which is externally adjustable from 0.6V to ~90% of the input voltage. Continuous output load current capability is 9A for TJ ≤ +125 °C and 6A for TJ ≤ +150 °C. The ISL70003ASEH uses voltage mode control architecture with feed-forward and switches at a selectable frequency of 500kHz or 300kHz. Loop compensation is externally adjustable to allow for an optimum balance between stability and output dynamic performance. The device features two logic-level disable inputs that can be used to inhibit pulses on the phase (LXx) pins to maximize efficiency based on the load current. The ISL70003ASEH also supports DDR applications and contains a buffer amplifier for generating the VREF voltage. High integration, best-in-class radiation performance and a feature-filled design make the ISL70003ASEH an ideal choice to power many of today’s small form-factor applications.


  • Acceptance tested to 50krad(Si) (LDR) wafer-by-wafer
  • ±1% reference voltage over line, temperature, and radiation
  • Integrated MOSFETs 31mΩ PFET/21mΩ NFET; 95% peak efficiency
  • Externally adjustable loop compensation
  • Supports DDR applications (VTT tracks VDDQ/2)
  • Grounded lid eliminates charge build up
  • IMON pin for output current monitoring
  • Adjustable analog soft-start
  • Diode emulation for increased efficiency at light loads
  • 500kHz or 300kHz operating frequency
  • Monotonic start-up into prebiased load
  • Full military temperature range operation
    • TA = -55 °C to +125 °C
    • TJ = -55 °C to +150 °C
  • Radiation Acceptance (See TID Report)
    • High dose rate (50-300rad(Si)/s): 100krad(Si)
    • Low dose rate (0.01rad(Si)/s): 50krad(Si)
  • SEE hardness (See SEE report)
    • SEB and SEL LETTH: 86.4MeV•cm2/mg
    • SET at LET 86.4MeV•cm2/mg: < ±3% ΔVOUT
    • SEFI LETTH: 60MeV•cm2/mg
  • Electrically screened to DLA SMD 5962-14203


  • FPGA
  • CPLD
  • DSP
  • CPU core
  • And I/O supply voltages
  • DDR memory supply voltages
  • Low-voltage
  • High-density distributed power systems

Product Options

Part Number Part Status Pkg. Type Carrier Type DLA SMD Buy Sample
Active CQFP Tray
Active CQFP Tray 5962R1420302VYC
Active 5962R1420302V9A
Active DIE 5962R1420302V9A


Title language Type Format File Size Date
Datasheets & Errata
ISL70003ASEH Datasheet Datasheet PDF 1.71 MB
User Guides & Manuals
ISL70003ASEHEV2Z User Guide Manual PDF 912 KB
ISL70003ASEHEVAL1Z User Guide Manual PDF 1.20 MB
Application Notes & White Papers
AN1915: ISL70003SEH iSim:PE Model Application Note PDF 583 KB
AN1954: ISL70003SEH PSPICE Average Model Application Note PDF 312 KB
AN9867: End of Life Derating: A Necessity or Overkill Application Note PDF 338 KB
Wafer by Wafer Low Dose Rate Acceptance White Paper White Paper PDF 533 KB
Intersil Space Products Brochure Brochure PDF 3.14 MB
Intersil Commercial Lab Services Brochure PDF 364 KB
Standard Microcircuit Drawing 5962-14203 (ISL70003SEH, ISL70003ASEH) Other 0 KB
TB502: High Power ISL70003ASEH High Temperature Operating Life (HTOL) and Overcurrent Abuse Other PDF 212 KB
PIN19011 - Price Increase for the Listed Renesas Electronics America (REA) Radiation Hardened Space Products Price Increase Notice PDF 360 KB
ISL70003SEH Neutron Test Report Report PDF 398 KB
ISL70003ASEH SEE Test Report Report PDF 1.15 MB
ISL70003ASEH Total Dose Test Report Report PDF 461 KB
ISL70003ASEH iSim:PE Model Schematic SXSCH 479 KB


Title language Type Format File Size Date
ISL70003ASEH Monte-Carlo Spice Model Model ZIP 255 KB
isl70003seh-pspice-files Model ZIP 76 KB
ISL70003ASEHEV1Z Design Files Design File ZIP 1.07 MB
ISL70003ASEHEV2Z Design Files Design File ZIP 618 KB

Software & Tool Pages

Title Type Description Company
iSim:PE Offline Simulation Tool Simulator iSim Personal Edition (iSim:PE) speeds the design cycle and reduces risk early in any project, identifying parts that can be used in current as well as next-generation designs. Renesas

Boards & Kits

Part Number Title Type Company
ISL70003ASEHEV1Z Rad Hard 9A Buck Regulator Evaluation Board Evaluation Renesas
ISL70003ASEHEV2Z Rad Hard 9A Buck Regulator Evaluation Board Evaluation Renesas
ISLRTG4DEMO1Z Renesas Radiation Hardened Power Solution for RTG4 FPGA Demonstration Renesas

News & Additional Resources

Type Date Sort ascending
Low Dose Rate Acceptance Testing Page Mar 25, 2020
Standard Data Package Page Mar 19, 2020
Rad Hard SMD Test Flow Page Mar 19, 2020
Rad Hard Test Reports Page Mar 19, 2020