Overview
The TLV431BQPK is a low-voltage adjustable precision shunt regulator produced by Texas Instruments. It is designed as a low-power counterpart to the TL431, offering a lower reference voltage of 1.24V and lower minimum cathode current. This device is ideal for applications requiring adjustable voltage references in industrial, automotive, telecommunications, and computing environments. The TLV431BQPK can operate with cathode voltages ranging from 1.24V to 6V, making it versatile for various end-equipment needs.
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 | 0.5% (TLV431B) | % |
| Minimum Cathode Current for Regulation (IK(min)) | 55 to 100 | µA |
| Off-State Cathode Current (IK(off)) | 0.001 to 0.1 | µA |
| Dynamic Impedance (|zKA|) | 0.25 to 0.4 | Ω |
| Operating Temperature Range | –40°C to 125°C (TLV431Q), –40°C to 85°C (TLV431I), 0°C to 70°C (TLV431C) | °C |
| Typical Output Impedance | 0.25 | Ω |
| Maximum Cathode Current | 15 | mA |
Key Features
- Low-voltage operation with a reference voltage of 1.24V.
- Adjustable output voltage from 1.24V to 6V using two external resistors.
- Reference voltage tolerances at 25°C: 0.5% for TLV431B, 1% for TLV431A, and 1.5% for TLV431.
- Low operational cathode current, typically 80 µA.
- Typical output impedance of 0.25 Ω.
- Ultra-small SC-70 package offering a 40% smaller footprint than SOT-23-3.
- AEC-Q100 qualified for automotive applications (TLV431x-Q1).
Applications
The TLV431BQPK is suitable for a wide range of applications, including:
- Industrial equipment: For voltage regulation and reference in various industrial settings.
- Automotive: Qualified for automotive applications with AEC-Q100 certification.
- Telecommunications: Used in switching-mode power supplies and other telecom equipment.
- Computing: For on-board regulation and adjustable power supplies in computing devices.
- Isolated feedback circuits: Ideal when used with an optocoupler for isolated feedback in power supplies).
Q & A
- What is the reference voltage of the TLV431BQPK?
The reference voltage (VREF) of the TLV431BQPK is 1.24V).
- What is the adjustable output voltage range of the TLV431BQPK?
The output voltage can be adjusted from 1.24V to 6V using two external resistors).
- What are the reference voltage tolerances for the TLV431BQPK?
The reference voltage tolerances at 25°C are 0.5% for TLV431B, 1% for TLV431A, and 1.5% for TLV431).
- What is the minimum cathode current required for regulation?
The minimum cathode current for regulation (IK(min)) is between 55 µA and 100 µA).
- What is the typical output impedance of the TLV431BQPK?
The typical output impedance is 0.25 Ω).
- What are the operating temperature ranges for the TLV431BQPK?
The operating temperature ranges are –40°C to 125°C for TLV431Q, –40°C to 85°C for TLV431I, and 0°C to 70°C for TLV431C).
- Is the TLV431BQPK suitable for automotive applications?
Yes, the TLV431BQPK is AEC-Q100 qualified for automotive applications).
- How can the TLV431BQPK be used in isolated feedback circuits?
The TLV431BQPK can be used with an optocoupler in isolated feedback circuits for switching-mode power supplies).
- What is the maximum cathode current of the TLV431BQPK?
The maximum cathode current is 15 mA).
- Does the TLV431BQPK require an output capacitor for stability?
No, the TLV431BQPK is internally compensated and does not require an output capacitor for stability).
