Overview
The TL431AQDBZRQ1 is an adjustable precision shunt regulator produced by Texas Instruments. This device is part of the TL431-Q1 series, which is qualified for automotive applications and adheres to AEC-Q100 test guidelines. It offers high thermal stability over a wide temperature range, making it suitable for various automotive, commercial, and military applications.
The TL431AQDBZRQ1 is a three-pin device packaged in a SOT-23 (DBZ) package, providing a compact solution for voltage regulation needs. It features active output circuitry with a sharp turn-on characteristic, making it an excellent replacement for Zener diodes in many applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Reference Voltage Tolerance at 25°C | 0.5% (B Grade), 1% (A Grade), 2% (Standard Grade) | % |
| Typical Temperature Drift | 14 mV (Q Temp) | mV |
| Output Impedance | 0.2 Ω | Ω |
| Sink-Current Capability | 1 mA to 100 mA | mA |
| Adjustable Output Voltage | VREF (approximately 2.5 V) to 36 V | V |
| Operating Temperature Range | –40°C to 125°C | °C |
| Package Type | SOT-23 (DBZ) |
Key Features
- Qualified for automotive applications with AEC-Q100 test guidance.
- Wide operating temperature range: –40°C to 125°C.
- Low output noise and typical output impedance of 0.2 Ω.
- Sink-current capability from 1 mA to 100 mA.
- Adjustable output voltage from VREF (approximately 2.5 V) to 36 V using two external resistors.
- Sharp turn-on characteristic, making it an excellent replacement for Zener diodes.
- Internally compensated for stability without an output capacitor.
Applications
- Adjustable voltage and current referencing.
- Secondary side regulation in flyback SMPSs (Switch-Mode Power Supplies).
- Zener replacement in various circuits.
- Voltage monitoring and comparator applications with integrated reference.
- Onboard regulation, adjustable power supplies, and switching power supplies.
- Automotive LED lighting and other automotive power management systems.
Q & A
- What is the operating temperature range of the TL431AQDBZRQ1?
The operating temperature range is –40°C to 125°C.
- What is the reference voltage tolerance at 25°C for the TL431AQDBZRQ1?
The reference voltage tolerance is 0.5% (B Grade), 1% (A Grade), and 2% (Standard Grade) at 25°C.
- What is the typical output impedance of the TL431AQDBZRQ1?
The typical output impedance is 0.2 Ω.
- What is the sink-current capability of the TL431AQDBZRQ1?
The sink-current capability ranges from 1 mA to 100 mA.
- How is the output voltage of the TL431AQDBZRQ1 adjusted?
The output voltage can be adjusted from VREF (approximately 2.5 V) to 36 V using two external resistors.
- Is the TL431AQDBZRQ1 internally compensated for stability?
Yes, the device is internally compensated and does not require an output capacitor for stability.
- What are some common applications of the TL431AQDBZRQ1?
Common applications include adjustable voltage and current referencing, secondary side regulation in flyback SMPSs, Zener replacement, voltage monitoring, and onboard regulation.
- What package type is the TL431AQDBZRQ1 available in?
The TL431AQDBZRQ1 is available in a SOT-23 (DBZ) package.
- Can the TL431AQDBZRQ1 replace Zener diodes in circuits?
Yes, the TL431AQDBZRQ1 is an excellent replacement for Zener diodes due to its sharp turn-on characteristic and adjustable output voltage.
- Is the TL431AQDBZRQ1 suitable for automotive applications?
Yes, the TL431AQDBZRQ1 is qualified for automotive applications and meets AEC-Q100 test guidelines.
