Overview
The TLV431AIDBVTG4 is a low-voltage adjustable precision shunt regulator produced by Texas Instruments. This device is part of the TLV431 series, which is designed to operate at lower voltages compared to traditional shunt regulators like the TL431. The TLV431AIDBVTG4 offers a reference voltage of 1.24V and can be adjusted to output voltages ranging from 1.24V to 6V using two external resistors. It is particularly suited for applications requiring low-voltage adjustability and high precision.
Key Specifications
| Parameter | Unit | Min | Typ | Max |
|---|---|---|---|---|
| Reference Voltage (VREF) | V | 1.228 | 1.24 | 1.252 |
| VREF Deviation over Full Temperature Range | mV | 4 | - | 12 |
| Minimum Cathode Current for Regulation (IK(min)) | µA | 55 | 80 | - |
| Off-state Cathode Current (IK(off)) | µA | 0.001 | - | 0.1 |
| Dynamic Impedance (|zKA|) | Ω | 0.25 | - | 0.4 |
| Operating Temperature Range | °C | 0 | - | 70 |
| Package Type | - | SOT-23-3 (DBZ) | - | - |
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 for the TLV431A version
- Low operational cathode current, typically 80µA
- Ultra-small SC-70 package available, offering a 40% smaller footprint than SOT-23-3
- Active output circuitry providing a sharp turn-on characteristic, making it an excellent replacement for low-voltage Zener diodes
- Internally compensated for stability without the need for an output capacitor
Applications
- Adjustable voltage and current referencing
- Secondary side regulation in flyback switching-mode power supplies (SMPSs)
- Zener replacement
- Voltage monitoring
- Comparator with integrated reference
- Isolated feedback circuits for 3V to 3.3V switching-mode power supplies when used with an optocoupler
Q & A
- What is the reference voltage of the TLV431AIDBVTG4?
The reference voltage is 1.24V.
- What is the adjustable output voltage range of the TLV431AIDBVTG4?
The output voltage can be adjusted from 1.24V to 6V using two external resistors.
- What is the typical operational cathode current of the TLV431AIDBVTG4?
The typical operational cathode current is 80µA.
- What are the temperature ranges for the TLV431AIDBVTG4?
The device is characterized for operation from 0°C to 70°C.
- Can the TLV431AIDBVTG4 be used as a comparator?
- What is the dynamic impedance of the TLV431AIDBVTG4?
The dynamic impedance is typically 0.25Ω.
- Does the TLV431AIDBVTG4 require an output capacitor for stability?
No, the TLV431AIDBVTG4 is internally compensated and does not require an output capacitor for stability.
- What are some common applications of the TLV431AIDBVTG4?
Common applications include adjustable voltage and current referencing, secondary side regulation in flyback SMPSs, Zener replacement, voltage monitoring, and comparator with integrated reference.
- How does the TLV431AIDBVTG4 compare to traditional Zener diodes?
The TLV431AIDBVTG4 provides a sharper turn-on characteristic and is an excellent replacement for low-voltage Zener diodes.
- What package types are available for the TLV431AIDBVTG4?
The device is available in several package types, including SOT-23-3 (DBZ) and SC-70 (DCK).
