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Nexperia NEX91730-Q100 LDO Voltage Tracking Regulator

Nexperia NEX91730-Q100 Low-Dropout (LDO) Voltage Tracking Regulator, which includes high tracking accuracy of 5mV (max.) and excellent load and line transient responses. This device specifically powers off-board sensors in automotive applications, such as powertrain, safety, and Body Control Modules (BCMs). The device supports a wide input voltage range from 4V to 40V (up to 45V transient) to withstand cold-crank and load dump transient conditions.

The device output tracks the reference voltage applied to the EN/ADJ pin with an accuracy of ±5mV over the specified temperature range for loads up to 300mA. The high tracking accuracy ensures a precise power supply for off-board sensors and modules, improving the performance of radiometric sensors such as pressure and position sensors.

The Nexperia NEX91730-Q100 switches to standby mode by pulling down the EN/ADJ pin, enabling an ultra-low, typical shutdown current of 0.75µA to extend battery life. The device integrates protection features such as battery reverse-polarity protection (-42V), output reverse-current protection, output short-to-battery and ground protection, current limit, and thermal shutdown. These protections guard against the high risk of cable failures in an off-board power system. The power-good (PG) output indicates an overvoltage or undervoltage condition of the tracking output.

The device operates across a temperature range from -40°C to +125°C ambient and -40°C to +150°C junction. It is available with a thermal-enhanced SOT8063-2 (HSO8) package.

Features

  • AEC-Q100 qualified for automotive applications
    • -40°C to +125°C temperature grade 1 (Tamb)
    • -40°C to +150°C junction temperature range (Tj)
  • 4V to 40V input voltage range with a -42V to 45V absolute maximum input range
  • 2V to 40V wide output voltage range with a -5V to 45V absolute maximum output range
  • ±5mV tight output tracking tolerance
  • 300mA maximum output current
  • 440mV (typ.) at 300mA (VOUT = 5V) low dropout voltage
  • Low quiescent current (IQ)
    • 45µA typical quiescent current at light loads
    • 0.75µA typical shutdown current
  • Overvoltage and undervoltage indication at PG output
  • Active output discharge with a typical discharge current of 800µA
  • Stable with a wide range of ceramic output-stability cap using an ESR from 0.001Ω to 5Ω and output capacitor from 4.7µF to 470µF
  • Integrated various fault protections
    • Reverse polarity protected input
    • Reverse current protection
    • Thermal shutdown
    • Short-circuit to ground and battery protection
    • Over-current protection
  • SOT8063-2 (HSO8) package available with RθJA = 47.5°C/W

Applications

  • Supply for off-board sensors
  • High precision voltage tracking
  • Body Control Modules (BCMs)
  • Power switch for off-board loads

Typical Application

Application Circuit Diagram - Nexperia NEX91730-Q100 LDO Voltage Tracking Regulator

Functional Block Diagram

Block Diagram - Nexperia NEX91730-Q100 LDO Voltage Tracking Regulator
Published: 2026-06-08 | Updated: 2026-06-19