Overview
The TL431AIDCKTG4 is a precision programmable reference voltage regulator produced by Texas Instruments. It is part of the TL431 series, which includes three-terminal adjustable shunt regulators known for their thermal stability across various temperature ranges. These devices are suitable for automotive, commercial, and military applications due to their robust performance characteristics.
The TL431AIDCKTG4 offers adjustable output voltage, low output noise, and a sharp turn-on characteristic, making it an excellent replacement for Zener diodes in many applications. It is available in different grades with varying initial tolerances, ensuring high accuracy and stability.
Key Specifications
| Parameter | Value | Notes |
|---|---|---|
| Reference Voltage Tolerance at 25°C | 0.5% (B Grade), 1% (A Grade), 2% (Standard Grade) | |
| Adjustable Output Voltage | Vref (approximately 2.5V) to 36V | Set with two external resistors |
| Operating Temperature Range | −40°C to 125°C | Dependent on device grade (C, I, Q) |
| Typical Temperature Drift | 6mV (C Temp), 14mV (I Temp, Q Temp) | |
| Output Impedance | 0.2Ω (Typical) | |
| Sink-Current Capability | 1mA to 100mA | |
| Package Type | SC70 (DCK) |
Key Features
- Adjustable output voltage from Vref (approximately 2.5V) to 36V with two external resistors.
- Operation from −40°C to 125°C, depending on the device grade (C, I, Q).
- Low output noise and typical output impedance of 0.2Ω.
- Sink-current capability from 1mA to 100mA.
- Sharp turn-on characteristic, making it an excellent replacement for Zener diodes.
- Available in three grades with initial tolerances of 0.5%, 1%, and 2% at 25°C.
Applications
- Adjustable voltage and current referencing.
- Secondary side regulation in flyback SMPSs.
- Zener replacement.
- Voltage monitoring.
- Comparator with integrated reference.
- On-board regulation, adjustable power supplies, and switching power supplies.
Q & A
- What is the TL431AIDCKTG4?
The TL431AIDCKTG4 is a precision programmable reference voltage regulator from Texas Instruments.
- What are the initial tolerance grades for the TL431AIDCKTG4?
The device is available in three grades with initial tolerances of 0.5% (B Grade), 1% (A Grade), and 2% (Standard Grade) at 25°C.
- What is the adjustable output voltage range of the TL431AIDCKTG4?
The output voltage can be set to any value between Vref (approximately 2.5V) and 36V using two external resistors.
- What is the operating temperature range of the TL431AIDCKTG4?
The device operates from −40°C to 125°C, depending on the device grade (C, I, Q).
- What is the typical output impedance of the TL431AIDCKTG4?
The typical output impedance is 0.2Ω.
- What are some common applications of the TL431AIDCKTG4?
Common applications include adjustable voltage and current referencing, secondary side regulation in flyback SMPSs, Zener replacement, voltage monitoring, and comparator with integrated reference.
- Can the TL431AIDCKTG4 replace Zener diodes?
- What is the sink-current capability of the TL431AIDCKTG4?
The device has a sink-current capability from 1mA to 100mA.
- What package type is the TL431AIDCKTG4 available in?
The TL431AIDCKTG4 is available in the SC70 (DCK) package type.
- What are the benefits of using the TL431AIDCKTG4 in power supplies?
The device offers low output noise, high stability over temperature, and adjustable output voltage, making it suitable for on-board regulation, adjustable power supplies, and switching power supplies.
