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IC manufacturers Renesas

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Renesas ISL70001SRH

Radiation Hardened and SEE Hardened 6A Synchronous Buck Regulator


TopologyBuck Converter
Input voltage5 V
Switching frequency1000 kHz
IC revision2


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 loadcurrent capacity is 6A for TJ < +145°C. High integration and class leading radiation tolerance makes the ISL70001SEH, ISL70001SRH ideal choices to power many of today’s small form factor applications. Two devices can besynchronized 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 andradiation
  • 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
  • Bi-directional SYNC pin allows two devices to be synchronized180°C out-of-phase
  • Starts into pre-biased load
  • Power-good output voltage monitor
  • Adjustable analog soft-start
  • Input undervoltage, output undervoltage and outputovercurrent 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)

Typical applications

  • Low-Voltage, High-Density Distributed Power Systems
  • FPGA, CPLD, DSP, CPU Core or I/O Voltages