Overview
The TLVH431AQDBZRG4, produced by Texas Instruments, is a three-terminal adjustable shunt regulator. This device is part of the TL431 family and is known for its high precision and thermal stability across various temperature ranges. It is designed to operate in automotive, commercial, and military environments, making it versatile for a wide range of applications. The TLVH431AQDBZRG4 allows for adjustable output voltage settings between the reference voltage (approximately 2.5V) and 36V, using two external resistors. This feature, along with its sharp turn-on characteristic, makes it an excellent replacement for Zener diodes in many circuits.
Key Specifications
| Parameter | Value |
|---|---|
| Package | SOT-23 (DBZ) |
| Pins | 3 |
| Operating Temperature Range (°C) | -40 to 125 |
| Reference Voltage Tolerance at 25°C | 0.5% (B Grade), 1% (A Grade), 2% (Standard Grade) |
| Adjustable Output Voltage | Vref to 36V |
| Typical Output Impedance | 0.2Ω |
| Sink-Current Capability | 1mA to 100mA |
| Typical Temperature Drift | 6mV (C Temp), 14mV (I Temp, Q Temp) |
Key Features
- Reference voltage tolerance at 25°C: 0.5% (B Grade), 1% (A Grade), 2% (Standard Grade)
- Adjustable output voltage: Vref to 36V using two external resistors
- Operation from -40°C to 125°C
- Low output noise
- Typical output impedance of 0.2Ω
- Sink-current capability: 1mA to 100mA
- Sharp turn-on characteristic, making it suitable for replacing Zener diodes
Applications
- Adjustable voltage and current referencing
- Secondary side regulation in flyback switching mode power supplies (SMPS)
- Zener replacement
- Voltage monitoring
- On-board regulation
- Adjustable power supplies
- Switching power supplies
Q & A
- What is the TLVH431AQDBZRG4? The TLVH431AQDBZRG4 is a three-terminal adjustable shunt regulator produced by Texas Instruments.
- What is the operating temperature range of the TLVH431AQDBZRG4? The device operates from -40°C to 125°C.
- How is the output voltage adjusted? The output voltage can be set to any value between Vref (approximately 2.5V) and 36V using two external resistors.
- What are the reference voltage tolerances available? The reference voltage tolerances are 0.5% (B Grade), 1% (A Grade), and 2% (Standard Grade) at 25°C.
- What is the typical output impedance of the TLVH431AQDBZRG4? The typical output impedance is 0.2Ω.
- What is the sink-current capability of the device? The sink-current capability ranges from 1mA to 100mA.
- Can the TLVH431AQDBZRG4 replace Zener diodes? Yes, it can replace Zener diodes due to its sharp turn-on characteristic.
- What are some common applications of the TLVH431AQDBZRG4? Common applications include adjustable voltage and current referencing, secondary side regulation in flyback SMPS, Zener replacement, voltage monitoring, on-board regulation, and switching power supplies.
- What package type does the TLVH431AQDBZRG4 come in? The device comes in an SOT-23 (DBZ) package with 3 pins.
- Is the TLVH431AQDBZRG4 suitable for automotive and military applications? Yes, it is designed to operate in automotive, commercial, and military temperature ranges.
