The ISL70001SEH, ISL70001SRH are radiation hardened and SEE hardened high efficiency monolithic synchronous buck regulators 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. High integration and class-leading radiation tolerance make the ISL70001SEH, ISL70001SRH ideal choices 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. In applications where the ENABLE input is tied high to PVIN we recommend that the input voltage ramp rate be equal to or greater than 10V/ms. This is to prevent unwanted voltage from prematurely appearing on the output. For a PVIN voltage that has a slower ramp rate or is stepped up we recommend use of the ISL70001ASEH. Ensuring that the ENABLE input is held low until the chosen VINPOR is satisfied will prevent this ‘false start’.


  • ±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)
  • High efficiency >90%
  • Fixed 1MHz operating frequency
  • Available in a thermally enhanced heatsink package - R48.B
  • 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
  • Starts into prebiased load
  • 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
  • EH version is wafer-by-wafer acceptance tested for ELDRS
  • Radiation hardness
  • Total dose [50-300rad(Si)/s]: 100krad(Si) (min)
  • Total dose [<10mrad(Si)/s]: 50krad(Si) (min)
  • 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 5962R0922502VXC
Active CQFP Tray 5962R0922502VYC
Active DIE 5962R0922502VYC


Title language Type Format File Size Date
Datasheets & Errata
ISL70001SEH, ISL70001SRH Datasheet Datasheet PDF 648 KB
Application Notes & White Papers
AN1969: ISL70001SRH, ISL7000S1EH SPICE Average Model Application Note PDF 249 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 5962-09225 (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
PAN16028 - Datasheet Specification Change for Standard Microcircuit Drawing (SMD) Part Number 5962R0922501*, 5962R0922502* and Intersil Part Numbers ISL70001S* Product Alert Notice PDF 269 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
TB504: ISL70001SEH, ISL70001SRH VOUT Power-Up/Down Glitch Problem Report Technical Brief PDF 1.40 MB
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

Boards & Kits

Part Number Title Type Company
ISL70001SRHEVAL1Z Rad Hard & SEE Hard 6A Synchronous Buck Regulator Evaluation Board Evaluation Renesas
VIRTEX5MEZPWREV1Z Rad Hard FPGA Power Solution Reference Design Reference 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