Nexperia Automotive tracking LDO NEX91207-Q100

The NEX91207-Q100 is a Low-Dropout (LDO) voltage-tracking regulator with a precise tracking tolerance 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 systems, 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 ADJ/EN pin with an accuracy of ±5 mV over the specified temperature range. 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 ADJ/EN 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 device operates across a temperature range from -40 °C to 125 °C ambient and -40 °C to 150 °C junction. It is available in two package options with different thermal resistance, including SOT8105-1 (SOT23-5S) and SOT8104-1 (SOT23-5).

Key features

• Automotive product qualification in accordance with AEC-Q100 (Grade 1)
  • Temperature grade 1 (T_amb): -40 °C to 125 °C
  • Junction temperature (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: 70 mA
• Low dropout voltage: 215 mV typical at 70 mA (V_OUT = 5 V)
• Low quiescent current (I_Q): 40 µA typical quiescent current at light loads; 0.75 µA typical shut-down current
• Active output discharge with a typical discharge current of 700 µA
• Stable with a wide range of ceramic output-stability cap: ESR from 0.001 Ω to 3 Ω; output capacitor from 1 µF to 220 µF
• Integrated various fault protections: Reverse polarity protected input, Reverse current protection, Thermal shutdown, Short-circuit to ground and battery protection, Over-current protection
• Package options: SOT8105-1 (SOT23-5S (NSOT23-5)): R_θJA= 131.7 °C/W; SOT8104-1 (SOT23-5): R_θJA= 175.6 °C/W

Applications

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