The ISL78083 is a versatile multi-rail power IC comprised of a primary high voltage synchronous buck regulator, two secondary low voltage synchronous buck regulators, and an LDO regulator. It also offers four overvoltage and undervoltage monitors, three power-good indicators, and a reset output/fault indicator. To limit common-cause failures, the ISL78083 also includes a second reference for the OV/UV monitors, independent from the reference of the regulators. The ISL78083 is intended for high-density power applications, requiring few external components and minimal board space. It offers an extensive feature set configured using internal One-Time Programmable (OTP) memory. Nearly all device options, such as each output voltage selection, power sequencing, and OV/UV thresholds are internally configured and require no external components for selection. The regulators also offer internal compensation. The bucks are synchronous to achieve high efficiency and are capable of operating in harsh environments requiring high ambient temperature. ISL78083 is available in a 4mmx4mm 24 Ld Step Cut QFN (SCQFN) package with an exposed pad for improved thermal performance. It is AEC-Q100 qualified to Grade 1 and operates across an ambient temperature range of -40°C to 125°C and is electrically specified across a junction temperature range of -40°C to 150°C.


  • VIN operating range from 4.0V to 42V
  • Start range: 4.5V to 42V
  • Fixed switching frequency: 2.2MHz with optional pseudo-random spread spectrum
  • Three synchronous bucks with internal compensation and one LDO
  • Buck1 output range: 3.3V to 5.05V
  • Buck2 output range: 1.0V to 3.3V
  • Buck3 output range: 1.0V to 3.3V
  • LDO4 output range: 2.8V to 3.4V
  • Output UV/OV thresholds, OTP: ±4%, ±6%, ±8%, ±12%
  • OTP power up/down sequence and delay
  • Optional output discharge on Buck2, Buck3, and LDO4
  • Current at VIN input under shutdown: <1µA typical
  • Protection features
  • Input voltage UVLO
  • Output OV/UV
  • Positive and negative current limits on bucks
  • Overcurrent protection on internal and output LDOs
  • Fail-safe controller
  • CRC of OTP registers
  • OTP hiccup or latch-off fault response




  • Rear and surround view HD automotive cameras
  • Driver monitoring cameras
  • HD dash cam


Type Title Date
Datasheet PDF 912 KB
Product Change Notice PDF 156 KB
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