The ISL70001ASEH 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 capacity is 6A for TJ <+145 °C. The ISL70001ASEH utilizes peak current-mode control for excellent output load transient response and features integrated compensation and switches at a fixed frequency of 1MHz to reduce component size and count. In an application where two POLs are needed, two ISL70001ASEH devices can be synchronized 180° out-of-phase to reduce the overall input RMS ripple current. The internal synchronous power switches are optimized for high efficiency and good thermal performance. The ISL70001ASEH incorporates fault protection for the regulator. The protection circuits include input undervoltage, output undervoltage and output overcurrent. High integration and class-leading radiation tolerance make the ISL70001ASEH an ideal choice to power many of today’s 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.


  • ±1% reference voltage over line, load, temperature, and radiation
  • Current mode control for excellent dynamic response
  • Full mil-temp range operation (TA = -55 °C to +125 °C)
  • 50% lower shutdown supply current than the ISL70001SEH
  • Available in a thermally enhanced heatsink package - R48.B
  • Highly efficient: 94% peak efficiency
  • Operates from 3V to 5.5V supply
  • Adjustable output voltage
  • Two external resistors set VOUT from 0.8V to ~85% of VIN
  • Bidirectional SYNC pin allows two devices to be synchronized 180° out-of-phase
  • Power-good output voltage monitor
  • Adjustable analog soft-start
  • Input undervoltage, output undervoltage and output overcurrent protection
  • Electrically screened to DLA SMD 5962-09225
  • QML qualified per MIL-PRF-38535 requirements
  • Radiation hardness
  • Total dose [50-300rad(Si)/s]: 100krad(Si)
  • Total dose [<10mrad(Si)/s]: 100krad(Si)* * Product capability established by initial characterization. The EH version is acceptance tested on a wafer-by-wafer basis to 50krad(Si) at low dose rate.
  • SEE hardness
  • SEL and SEB LETeff: 86.4MeV/mg/cm2 min
  • SEFI X-section (LETeff = 86.4MeV/mg/cm2) 1.4 x 10-6 cm2 max
  • SET LETeff (< 1 pulse perturbation) 86.4MeV/mg/cm2 min


  • FPGA, CPLD, DSP, CPU core or I/O 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
Active CQFP Tray 5962R0922503VXC
Active CQFP Tray 5962R0922503VYC
Active 5962R0922503V9A
Active DIE 5962R0922503V9A


Title language Type Format File Size Date
Datasheets & Errata
ISL70001ASEH Datasheet Datasheet PDF 1.58 MB
User Guides & Manuals
VIRTEX5MEZPWREV1Z User Guide Manual PDF 1.32 MB
ISL70001ASEHEV1Z User Guide Manual PDF 498 KB
Application Notes & White Papers
AN9867: End of Life Derating: A Necessity or Overkill Application Note PDF 338 KB
Radiation Hardened Load Switches Simplify Redundancy and Increase Reliability in Space Grade Power Systems White Paper PDF 522 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 5962-09225 (ISL70001ASEH, ISL70001SEH, ISL70001SRH) Other 0 KB
PIN19011 - Price Increase for the Listed Renesas Electronics America (REA) Radiation Hardened Space Products Price Increase Notice PDF 360 KB
ISL70001SRH Total Dose Test Report Report PDF 448 KB
ISL70001SRH SEE Test Report Report PDF 2.92 MB
ISL70001SRH Neutron Test Report Report PDF 437 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
ISL70001SRH PSPICE Average Model Model - HSPICE ZIP 532 KB
Artwork files for the VIRTEX5MEZPWREV1Z Evaluation Board Design File ZIP 328 KB
Schematics for the VIRTEX5MEZPWREV1Z Evaluation Board Design File PDF 98 KB
VIRTEX5MEZPWREV1Z Bill of Materials Design File XLS 38 KB

Boards & Kits

Part Number Title Type Company
ISL70001ASEHEV1Z Rad Hard & SEE Hard 6A Synchronous Buck Regulator Evaluation Board Evaluation 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