Nexperia Automotive Potected LDO Regulators NEX94215

The NEX94215-Q100 device is a Low-Dropout (LDO) linear regulator with fixed output voltage of 3.3 V or 5 V which can supply loads up to 150 mA. The device supports a wide input voltage range from 4 V to 40 V (up to 45 V transient) to withstand cold-cranking and load-dump transient conditions.

The device integrates multiple protection features. When configured as a power supply for off-board components (e.g., sensors) with external cables, the built-in short-to-battery and reverse polarity protections (-42 V) safeguard the system against harness failures.

The device employs a back-to-back PMOS topology to block reverse current without requiring an external diode. The device also supports current-limit protection to protect against output short-to-ground or overloading conditions that will eventually trigger thermal shutdown if shorting or overloading lasts long.

The device switches to standby mode by pulling down the EN pin, which enables an ultra-low shutdown current of 0.65 µA typical to extend battery life.

It operates across an ambient temperature range from -40 °C to 125 °C, and a junction temperature range from -40 °C to 150 °C.

Additionally, this device is available in SOT223 package.

Key features

• Automotive product qualification in accordance with AEC-Q100 (Grade 1)
  • Ambient temperature (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
• Output voltage range: 3.3 V and 5 V (fixed)
  • Absolute maximum output range: -1 V to 45 V
• Output voltage accuracy: ±1.5% (max)
• Maximum output current: 150 mA
• Low dropout voltage:
  • 320 mV typical at 150 mA (V_OUT = 5 V)
• Low quiescent current (I_Q):
  • 40 µA typical quiescent current at light loads
  • 0.65 µA typical shutdown current
• 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 2.2 µF to 470 µF
• Integrated fault protection features:
  • Reverse polarity on input
  • Short-to-battery protection on output
  • Reverse current protection
  • Short-circuit and overcurrent protection
  • Thermal shutdown
• Package: 4-pin SOT22 | R_θJA = 106.4 °C/W

Applications

• Power supplies for off-board sensors
• Powertrain of electric vehicles (EV), Hybrid electric vehicles (HEV)
• Body control modules (BCMs)
• Automotive head units & clusters