Nexperia Automotive 40V tracking LDO regulators NEX91x30-Q100

The NEX91x30-Q100 is a Low-Dropout (LDO) voltage-tracking regulator with high tracking accuracy of 5 mV (max) and excellent load and line transient responses. It is specifically designed to power off-board sensors in automotive applications such as power train, safety, and Body Control Modules (BCMs). The device supports a wide input voltage range from 4 V to 40 V (up to 45 V 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 ±5 mV over the specified temperature range for loads up to 300 mA. 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 device switches to standby mode by pulling down the EN/ADJ pin, which enables an ultra-low shutdown current of 0.75 µA typical to extend battery life. The device integrates protection features such as battery reverse polarity protection (-42 V), 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 over voltage or under voltage 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 thermal enhanced package SOT8063-2 (HSO8).

Key features

• AEC-Q100 qualified for automotive applications
  • Temperature grade 1 (T_amb): -40 °C to 125 °C
  • Junction temperature range (T_j): -40 °C to 150 °C
• Input voltage range: 4 V to 40 V
• Absolute maximum input range: -42 V to 45 V
• Wide output voltage range: 2 V to 40 V
• Absolute maximum output range: -5 V to 45 V
• Tight output tracking tolerance: ±5 mV
• Maximum output current: 300 mA
• Low dropout voltage: 440 mV typical at 300 mA (V_OUT = 5 V)
• Low quiescent current (I_Q): 45 µA typical quiescent current at light loads; 0.75 µA typical shut-down current
• Over voltage and under voltage indication at PG output
• Active output discharge with a typical discharge current of 800 µA
• Stable with a wide range of ceramic output-stability cap:
• ESR from 0.001 Ω to 5 Ω; output capacitor from 4.7 µF to 470 µF
• Integrated various fault protections: Reverse polarity protected input Reverse current protection, Thermal shutdown, Short-circuit to ground and battery protection, Over-current protection
• HSO8 package available: SOT8063-2 (HSO8): R_θJA = 47.5 °C/W

Applications

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