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onsemi NCV8740 High Voltage Linear Regulators

onsemi NCV8740 High Voltage Linear Regulators are automotive‑qualified, high‑input‑voltage LDOs designed to deliver reliable low‑power regulation in harsh vehicle and industrial environments. The onsemi NCV8740 supports a wide 3V to 85V input voltage range and provides up to 100mA of output current, making the regulators suitable for direct connection to automotive battery rails and other high‑voltage sources. These components are offered in a 3.3V fixed output version, as well as an adjustable version from 1.2V to 20V, with output accuracy of ±0.5% at +25°C and excellent regulation across temperature. The device features ultra‑low quiescent current (typically 5µA) and very low standby current, supporting energy‑efficient operation in always‑on automotive systems. Stability is maintained with a small 1µF ceramic output capacitor, enabling compact PCB layouts, while integrated soft‑start helps limit inrush current during startup.

For system monitoring and sequencing, the onsemi NCV8740 includes an open‑drain power‑good output with a programmable delay, set by an external capacitor. Comprehensive protection features such as thermal shutdown, current limiting, undervoltage lockout, and output active discharge enhance robustness and safety. Packaged in thermally enhanced MSOP‑8 EP and DFNW‑8 3mm × 3mm packages, and qualified to AEC‑Q100 with PPAP support, the NCV8740 is well suited for body electronics, infotainment, sensor modules, and other automotive and high‑reliability applications requiring dependable high‑voltage regulation.

Features

  • Wide 3V to 85V input voltage range
  • Output voltage versions
    • 3.3V fixed (other versions on request)
    • Adjustable from 1.2V to 20.0V
  • ±0.5% accuracy at TJ = +25°C
  • Very low 5µA (typical) quiescent current
  • 0.5µA typical standby current
  • Stable with 1µF ceramic output capacitor
  • Power good with programmable delay
  • Thermal shutdown and current limit protection
  • Built-in soft start circuit to suppress the inrush current
  • Output active discharge functions
  • Available in thermally enhanced MSOP8 EP and DFNW8 (on request) 3mm x 3mm packages
  • NCV prefix for automotive and other applications requiring unique site and control change requirements - AEC-Q100-qualified and PPAP capable
  • Lead-free and RoHS-compliant

Applications

  • Body control and sensor modules
  • On-board chargers
  • Infotainment and audio systems
  • General-purpose automotive

Specifications

  • Input
    • 3V to 85V operating input voltage range
    • 1.7V to 3.0V input voltage UVLO threshold range
    • 0.01V to 0.5V input voltage UVLO hysteresis range
  • Output
    • ±1.5% maximum output voltage accuracy
    • 1.2V typical ADJ reference voltage
    • ±100nA ADJ input current
    • 0.2% VOUT maximum line regulation
    • 0.4% VOUT maximum load regulation
    • 830mV maximum dropout voltage
    • 110mA to 300mA output current limit range
    • 110mA to 300mA short circuit current range
    • 50Ω typical active discharge resistance
  • Current consumption
    • 5µA maximum disable current
    • 15µA maximum quiescent current
      500µA maximum ground current
  • Enable thresholds
    • 0.3V to 1.2V enable voltage threshold
    • 0.01V to 0.3V enable voltage hysteresis
    • 1µA maximum enable pin current
  • 83µVRMS to 130µVRMS typical output noise voltage range
  • Thermal shutdown
    • +170°C typical temperature
    • +15°C typical hysteresis
  • +150°C maximum junction temperature
  • +260°C maximum lead soldering temperature
  • Thermal characteristics
    • 35.4°C/W (DFNW-8) or 38.7°C/W (MSOP-8) junction-to-air thermal resistance
    • 87.3°C/W (DFNW-8) or 102.0°C/W (MSOP-8) junction-to-case (top) thermal resistance
    • 10.3°C/W (DFNW-8) or 14.7°C/W (MSOP-8) junction-to-case (bottom) thermal resistance
    • 10.1°C/W (DFNW-8) or 15.2°C/W (MSOP-8) junction-to-board (top) thermal resistance
    • 7.4°C/W (DFNW-8) or 10.3°C/W (MSOP-8) junction-to-case (top) thermal characterization parameter
    • 10.2°C/W (DFNW-8) or 15.5°C/W (MSOP-8) junction-to-board (FEM) thermal characterization parameter
  • Maximum ESD capability
    • 2KV Human Body Model (HBM)
    • 1kV Charged Device Model (CDM)

Typical Application Schematics

Schematic - onsemi NCV8740 High Voltage Linear Regulators

Internal Block Diagram

Block Diagram - onsemi NCV8740 High Voltage Linear Regulators
Published: 2026-03-18 | Updated: 2026-03-25