The ISL70002SEH is a radiation hardened and SEE hardened high-efficiency monolithic, synchronous buck regulator with integrated MOSFETs. This single-chip power solution operates over an input voltage range of 3V to 5.5V and provides a tightly regulated output voltage that is externally adjustable from 0.8V to ~85% of the input voltage. Output load current capability is primarily determined by PVIN voltage with up to 22A for a single IC at PVIN ≤ 5. 5V for TJ ≤ +125°C. Two ISL70002SEH devices, configured to current share, can provide up to 38A of total output current at PVIN ≤ 5. 5V for TJ ≤ +125 °C assuming ±27% worst-case current share accuracy. The ISL70002SEH uses peak current-mode control with integrated error amp compensation and pin-selectable slope compensation. Switching frequency is also pin selectable to either 1MHz or 500kHz. Two devices can be synchronized 180° out-of-phase to reduce input RMS ripple current. High integration makes the ISL70002SEH an ideal choice to power small form factor applications. Two devices can be synchronized to provide a complete power solution for large-scale digital ICs, like field-programmable gate arrays (FPGAs) that require separate core and I/O voltages.


  • DLA SMD 5962-12202
  • Maximum output current for a single device: Up to 22A
  • Maximum output current for two current sharing devices based on 27% worst case current share mismatch: Up to 38A
  • Available in a thermally enhanced heat spreader package (R64.C)
  • 1MHz or 500kHz switching frequency
  • 3V to 5.5V supply voltage range
  • ±1% reference voltage (line, load, temperature, and rad)
  • Redundancy/junction isolation: exceptional SET performance
  • Excellent transient response
  • High efficiency >90%
  • Two ISL70002SEH synchronization, inverted-phase
  • Comparator input for enable and power-good
  • Input undervoltage, output undervoltage, and adjustable output overcurrent protection
  • QML qualified per MIL-PRF-38535
  • Full military temperature range operation (-55 °C to +125 °C)
  • Radiation environment
    • High dose 100krad(Si)
    • ELDRS 100krad(Si)*
      *Level assured by characterization; “EH” version is production tested to 50krad(Si).
  • SEE hardness
    • SEL and SEB LETTH 86.4MeV/mg/cm2
    • SEFI LETTH 43MeV/mg/cm2
    • SET LETTH 86.4MeV/mg/cm2


  • FPGA, CPLD, DSP, CPU core and I/O voltages
  • Low-voltage, high-density distributed power systems

Product Options

Part Number DLA SMD Part Status Pkg. Type Carrier Type Buy Sample
Active CQFP Tray
Active CQFP Tray
5962R1220201VXC Active CQFP Tray
5962R1220201VYC Active CQFP Tray
5962R1220201VYC Active DIE
5962R1220201VYC Active DIE


Title language Type Format File Size Date
Datasheets & Errata
ISL70002SEH Datasheet Datasheet PDF 1010 KB
User Guides & Manuals
ISL70002SEHDEMO1Z User Guide Manual PDF 1.91 MB
ISL70002SEHEVAL2Z User Guide Manual PDF 1.87 MB
ISL70002SEHEVAL1Z User Guide Manual PDF 1.42 MB
VIRTEX5MEZPWREV1Z User Guide Manual PDF 1.32 MB
Application Notes & White Papers
AN1970: ISL70002SEH SPICE Average Model Application Note PDF 243 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 5962-12202 (ISL70002SEH) Other 0 KB
PIN19011 - Price Increase for the Listed Renesas Electronics America (REA) Radiation Hardened Space Products Price Increase Notice PDF 360 KB
ISL70002SEH Total Dose Test Report Report PDF 519 KB
ISL70002SEH SEE Test Report Report PDF 1.88 MB
ISL70002SEH Neutron Test Report Report PDF 459 KB
ISL70002SEH Current Share iSim:PE Model Schematic SXSCH 322 KB
ISL70002SEH iSim:PE Model Schematic SXSCH 308 KB
TB515: High Power High Temperature Operating Life (HTOL) at High Currents Technical Brief PDF 296 KB
TB499: PCB Thermal Land Design for Ceramic Packages with Bottom Metal or Heat Sinks Technical Brief PDF 410 KB


Title language Type Format File Size Date
iSim:PE Software v8.40 Software EXE 157.43 MB
ISL70002SEH PSPICE Average Model Model ZIP 385 KB
Artwork files for the VIRTEX5MEZPWREV1Z Evaluation Board Design File ZIP 328 KB
ISL70002SEHEVAL1Z Design Files Design File ZIP 338 KB
ISL70002SEHEVAL2Z Design Files Design File ZIP 1.09 MB
Schematics for the VIRTEX5MEZPWREV1Z Evaluation Board Design File PDF 98 KB
VIRTEX5MEZPWREV1Z Bill of Materials Design File XLS 38 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
ISL70002SEHEVAL1Z Rad Hard and SEE Hard 12A Synchronous Buck Regulator with Current Sharing Evaluation Board Evaluation Renesas
ISL70002SEHEVAL2Z Rad Hard and SEE Hard 12A Synchronous Buck Regulator with Current Sharing Evaluation Board Evaluation Renesas
VIRTEX5MEZPWREV1Z Rad Hard FPGA Power Solution Reference Design Reference 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