Overview
The TLV431AIDBVT, produced by Texas Instruments, is a low-voltage, adjustable precision shunt regulator. This 3-terminal device is designed for applications requiring a stable and adjustable voltage reference. It operates with a reference voltage (VREF) of 1.24V and can be adjusted to output voltages between 1.24V and 6V using two external resistors. The TLV431AIDBVT is particularly useful in scenarios where low-voltage operation and high precision are necessary, such as in isolated feedback circuits for switching-mode power supplies and as replacements for low-voltage Zener diodes.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Reference Voltage (VREF) | 1.24 | V |
| Adjustable Output Voltage (VO) | 1.24 to 6 | V |
| Reference Voltage Tolerance at 25°C | 1% | |
| Typical Temperature Drift | 4mV (0°C to 70°C), 6mV (–40°C to 85°C), 11mV (–40°C to 125°C) | mV |
| Minimum Cathode Current for Regulation | 55 to 100 µA | µA |
| Typical Output Impedance | 0.25 Ω | Ω |
| Maximum Cathode Current | 15 mA | mA |
| Package Type | SOT-23-5 | |
| Operating Temperature Range | 0°C to 70°C, –40°C to 85°C, –40°C to 125°C (depending on version) | °C |
Key Features
- Low-voltage operation with a reference voltage of 1.24V
- Adjustable output voltage from 1.24V to 6V using two external resistors
- High precision with reference voltage tolerances of 1% at 25°C
- Low operational cathode current, typically 80 µA
- Typical output impedance of 0.25 Ω
- Active output circuitry providing a sharp turn-on characteristic
- Ultra-small SC-70 package option offering a 40% smaller footprint than SOT-23-3
- Ideal for replacing low-voltage Zener diodes and for on-board regulation and adjustable power supplies
Applications
- Isolated feedback circuits for 3V to 3.3V switching-mode power supplies
- Replacement for low-voltage Zener diodes
- On-board regulation and adjustable power supplies
- Voltage monitoring and comparator applications with integrated reference
- Secondary side regulation in flyback SMPSs
- Industrial, automotive, telecom, and computing equipment
Q & A
- What is the reference voltage of the TLV431AIDBVT?
The reference voltage (VREF) is 1.24V.
- What is the adjustable output voltage range of the TLV431AIDBVT?
The output voltage can be adjusted between 1.24V and 6V using two external resistors.
- What is the typical output impedance of the TLV431AIDBVT?
The typical output impedance is 0.25 Ω.
- What is the minimum cathode current required for regulation?
The minimum cathode current for regulation is between 55 to 100 µA.
- What are the typical temperature drift values for the TLV431AIDBVT?
The typical temperature drift values are 4mV (0°C to 70°C), 6mV (–40°C to 85°C), and 11mV (–40°C to 125°C).
- What package types are available for the TLV431AIDBVT?
The device is available in SOT-23-5, among other packages.
- Can the TLV431AIDBVT be used as a replacement for Zener diodes?
- What are some common applications of the TLV431AIDBVT?
- What is the operating temperature range for the TLV431AIDBVT?
- Does the TLV431AIDBVT require an external capacitor for stability?
