Overview
The TL431ACLPRP is a three-terminal adjustable shunt regulator produced by onsemi. This device operates as a low temperature coefficient zener diode, providing a precision reference voltage that can be programmed from 2.5V to 36V using two external resistors. It is known for its thermal stability over a wide range of temperatures, making it suitable for various automotive, commercial, and industrial applications.
Key Specifications
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions |
|---|---|---|---|---|---|---|
| Reference Input Voltage | Vref | 2.465 | 2.500 | 2.535 | V | IK = 10 mA, TA = 25°C |
| Cathode Current | IK | 1.0 | - | 100 | mA | - |
| Output Current | IO | 0.1 | - | 100 | mA | - |
| Thermal Resistance (Junction to Ambient) | RθJA | - | - | 150 | °C/W | TO-92 Package |
| Thermal Resistance (Junction to Case) | RθJC | - | - | 40 | °C/W | TO-92 Package |
| Operating Temperature Range | Toper | -40 | - | 70 | °C | - |
| Storage Temperature Range | Tstg | -65 | - | 150 | °C | - |
| Power Dissipation | PD | - | - | 1000 | mW | TO-92 Package, Ta = 25°C |
| Dynamic Output Impedance | Zout | - | 0.22 | - | Ω | IK = 10 mA |
| Line Regulation | ΔVref/ΔVI | - | 0.005 | - | %/V | IK = 10 mA, VI = 5V to 30V |
| Load Regulation | ΔVref/ΔIK | - | 0.001 | - | %/mA | VI = 30V, IK = 1.0 mA to 100 mA |
| Temperature Coefficient | TC | - | 35 | - | ppm/°C | - |
Key Features
- Programmable Output Voltage: The output voltage can be set to any value between 2.5V and 36V using two external resistors.
- Low Dynamic Output Impedance: Typical dynamic output impedance of 0.22 Ω, ensuring stable voltage regulation.
- Wide Operating Current Range: Cathode current range from 1.0 mA to 100 mA.
- Low Output Noise: The device exhibits low output noise, making it suitable for precision applications.
- Thermal Stability: Operates over a wide temperature range, including automotive and commercial grades.
- Replacement for Zener Diodes: Excellent replacement for zener diodes in many applications due to its sharp turn-on characteristic and adjustable voltage.
Applications
- Digital Voltmeters and Test Equipment: Used as a stable reference voltage source in measurement instruments.
- Power Supplies: Utilized in adjustable power supplies and switching power supplies for voltage regulation.
- Op-Amp Circuitry: Employed in operational amplifier circuits requiring a stable reference voltage.
- Feedback Control and Voltage Monitoring: Used in feedback control circuits and as a voltage monitor in various applications.
- Constant Current Sources and Sinks: Can be configured as a constant current source or sink.
- Series Pass Regulators: Used in series pass regulator configurations for precise voltage regulation.
Q & A
- What is the typical reference input voltage of the TL431ACLPRP?
The typical reference input voltage is 2.500 V, with a range of 2.465 V to 2.535 V.
- What is the operating current range of the TL431ACLPRP?
The cathode current range is from 1.0 mA to 100 mA.
- What is the dynamic output impedance of the TL431ACLPRP?
The typical dynamic output impedance is 0.22 Ω.
- What is the temperature coefficient of the TL431ACLPRP?
The temperature coefficient is approximately 35 ppm/°C.
- Can the TL431ACLPRP be used as a replacement for zener diodes?
Yes, it is an excellent replacement for zener diodes in many applications due to its adjustable voltage and sharp turn-on characteristic.
- What are the typical applications of the TL431ACLPRP?
It is used in digital voltmeters, power supplies, op-amp circuitry, feedback control, voltage monitoring, and as a constant current source or sink.
- What is the operating temperature range of the TL431ACLPRP?
The operating temperature range is from -40°C to +70°C.
- How is the output voltage of the TL431ACLPRP adjusted?
The output voltage can be adjusted using two external resistors to set the voltage between 2.5V and 36V.
- What is the storage temperature range for the TL431ACLPRP?
The storage temperature range is from -65°C to +150°C.
- What is the maximum power dissipation for the TL431ACLPRP in a TO-92 package?
The maximum power dissipation is 1000 mW at an ambient temperature of 25°C.
