Overview
The TLV431AIDBVR is a low-voltage, adjustable precision shunt regulator produced by Texas Instruments. This device is part of the TLV431 series, known for its low-voltage operation and high precision. It is particularly useful in applications requiring a stable voltage reference with adjustable output voltage. The TLV431AIDBVR operates from a minimum voltage of 1.24V, making it suitable for a wide range of applications, including on-board regulation, adjustable power supplies, and secondary side regulation in flyback switching-mode power supplies (SMPSs).
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% | - |
| Minimum Cathode Current for Regulation (IK(min)) | 100 | µA |
| Off-State Cathode Current (IK(off)) | 0.1 | µA |
| Dynamic Impedance (|zKA|) | 0.25 | Ω |
| Operating Temperature Range | -40 to 85 | °C |
| Package Type | SOT-23 (DBV) | - |
| Number of Pins | 5 | - |
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 a reference voltage tolerance of 1% at 25°C.
- Low operational cathode current, typically 80µA.
- Low output impedance, typically 0.25Ω.
- Ultra-small SOT-23 (DBV) package with 5 pins.
- No external capacitor required for stability.
- Ideal for replacing low-voltage Zener diodes and for use in isolated feedback circuits with optocouplers.
Applications
- On-board voltage regulation and adjustable power supplies.
- Secondary side regulation in flyback switching-mode power supplies (SMPSs).
- Zener diode replacement in low-voltage applications.
- Voltage monitoring and comparator functions with integrated reference.
- Industrial, automotive, telecommunications, and computing equipment.
Q & A
- What is the reference voltage of the TLV431AIDBVR?
The reference voltage (VREF) is 1.24V.
- What is the adjustable output voltage range of the TLV431AIDBVR?
The output voltage can be adjusted from 1.24V to 6V using two external resistors.
- What is the minimum cathode current required for regulation?
The minimum cathode current (IK(min)) required for regulation is 100µA).
- What is the typical output impedance of the TLV431AIDBVR?
The typical output impedance is 0.25Ω).
- Does the TLV431AIDBVR require an external capacitor for stability?
No, the TLV431AIDBVR is internally compensated and does not require an external capacitor for stability).
- What are the common applications of the TLV431AIDBVR?
Common applications include on-board voltage regulation, adjustable power supplies, Zener diode replacement, and secondary side regulation in flyback SMPSs).
- What is the operating temperature range of the TLV431AIDBVR?
The operating temperature range is -40°C to 85°C).
- What package type is the TLV431AIDBVR available in?
The TLV431AIDBVR is available in a SOT-23 (DBV) package with 5 pins).
- Can the TLV431AIDBVR be used as a comparator?
- Is the TLV431AIDBVR RoHS compliant?
