Overview
The TL431CDBVRE4 is a precision programmable reference voltage regulator produced by Texas Instruments. This three-terminal adjustable shunt regulator is known for its high thermal stability and versatility in various applications. It operates over a wide temperature range from -40°C to 125°C, making it suitable for automotive, commercial, and military environments.
The device features an adjustable output voltage that can be set between approximately 2.5 V (Vref) and 36 V using two external resistors. This flexibility, combined with its low output noise and high accuracy, makes the TL431CDBVRE4 an excellent choice for applications requiring precise voltage regulation.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Reference Voltage (Vref) | 2440 | 2495 | 2550 | mV |
| Reference Voltage Tolerance at 25°C | - | - | - | 0.5% (B Grade), 1% (A Grade), 2% (Standard Grade) |
| Adjustable Output Voltage | Vref | - | 36 V | V |
| Operating Temperature Range | -40 | - | 125 | °C |
| Typical Temperature Drift | - | 6 mV (C Temp), 14 mV (I Temp, Q Temp) | - | mV |
| Output Impedance | - | 0.2 Ω | - | Ω |
| Sink-Current Capability | 1 mA | - | 100 mA | mA |
Key Features
- High thermal stability over a wide temperature range (-40°C to 125°C)
- Adjustable output voltage from Vref (approximately 2.5 V) to 36 V using two external resistors
- Low output noise and high accuracy
- Typical output impedance of 0.2 Ω
- Sink-current capability from 1 mA to 100 mA
- Low temperature drift: 6 mV (C Temp), 14 mV (I Temp, Q Temp)
- Available in various packages including SOT-23, TO-92, SOIC, and others
Applications
- Rack server power supplies
- Industrial AC/DC power supplies
- AC inverter and variable frequency (VF) drives
- Servo drive control modules
- Notebook PC power adapter designs
- Onboard regulation and adjustable power supplies
- Switching power supplies
Q & A
- What is the TL431CDBVRE4?
The TL431CDBVRE4 is a precision programmable reference voltage regulator produced by Texas Instruments.
- What is the operating temperature range of the TL431CDBVRE4?
The device operates from -40°C to 125°C.
- How is the output voltage of the TL431CDBVRE4 adjusted?
The output voltage can be adjusted between approximately 2.5 V (Vref) and 36 V using two external resistors.
- What is the typical output impedance of the TL431CDBVRE4?
The typical output impedance is 0.2 Ω.
- What are the key applications of the TL431CDBVRE4?
Key applications include rack server power supplies, industrial AC/DC power supplies, AC inverter and VF drives, servo drive control modules, and notebook PC power adapter designs.
- What is the sink-current capability of the TL431CDBVRE4?
The device can sink current from 1 mA to 100 mA.
- How does the TL431CDBVRE4 compare to Zener diodes?
The TL431CDBVRE4 has active output circuitry that provides a very sharp turn-on characteristic, making it an excellent replacement for Zener diodes in many applications.
- What are the different grades of the TL431CDBVRE4?
The device is available in B Grade (0.5% tolerance), A Grade (1% tolerance), and Standard Grade (2% tolerance) at 25°C.
- What is the typical temperature drift of the TL431CDBVRE4?
The typical temperature drift is 6 mV (C Temp) and 14 mV (I Temp, Q Temp).
- What packages is the TL431CDBVRE4 available in?
The device is available in various packages including SOT-23, TO-92, SOIC, and others.
