The LM431BQ is a precision programmable shunt voltage reference that can be used in automotive applications. It is a three-terminal adjustable-output device that can keep stable under all capacitive loads. It requires two external resistors to set the output voltage from VREF to 36V.
The LM431BQ features low dynamic impedance, low noise, and low temperature coefficient to ensure a stable output voltage over a wide range of operating temperatures and currents. These high performances make it very suitable for multiple applications, such as precision audio components and flyback switching power supplies.
This device is AEC-Q100 qualified (Automotive Electronics Council (AEC) standard Q100 Grade 1) and it is suitable for automotive applications.
The LM431BQ is available in a Green SOT-23 package.
AEC-Q100 Qualified for Automotive Applications
Device Temperature Grade 1
TA = -40℃ to +125℃
Adjustable Output Voltage: VREF to 36V
Sink-Current Capability: 1mA to 100mA
▲Reference Voltage Tolerance at +25℃: 0.5%
Temperature Drift: 5mV (TYP)
Output Impedance: 0.1Ω (TYP)
▲High Stability under Capacitive Load
Low Output Noise
Operating Junction Temperature Range: -40℃ to +125℃
Available in a Green SOT-23 Package
AEC-Q100 Grade 1 Applications
Portable, Battery-Powered Equipment
Voltage Monitoring
Flyback Switching Power Supplies
Instrumentation
Product Testing
Precision Audio Components
| Part Number | Status | Package | Pins | Pb-Free | Temp Range | |
| LM431BQN3LG/TR | Production | SOT-23 | 3 | Y | -40℃ to +125℃ | Samples |
