Overview
The TLVH431QDBZR is a low-voltage, three-terminal adjustable voltage reference from Texas Instruments. It is part of the TLVH431 series, which offers specified thermal stability over industrial and commercial temperature ranges. This device is designed to operate with a low reference voltage of approximately 1.24V and can be adjusted to output voltages between 1.24V and 18V using two external resistors. The TLVH431QDBZR is characterized for operation from -40°C to +125°C, making it suitable for a wide range of applications in industrial, automotive, telecom, and computing sectors.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Reference Voltage (VREF) | 1.222 to 1.258 | V |
| Reference Voltage Tolerance at 25°C | 0.5% (B grade), 1% (A grade), 1.5% (Standard grade) | % |
| Adjustable Output Voltage | 1.24V to 18V | V |
| Operating Temperature Range | -40°C to +125°C | °C |
| Typical Output Impedance | 0.25Ω | Ω |
| Cathode Current Range | 100μA to 70mA | A |
| Minimum Cathode Current for Regulation | 60μA | A |
| Off-State Cathode Current | 0.02μA to 0.1μA | A |
| Dynamic Impedance | 0.25Ω to 0.4Ω | Ω |
Key Features
- Low-voltage operation down to 1.24V
- Adjustable output voltage from 1.24V to 18V with two external resistors
- Wide operating cathode current range: 100μA to 70mA
- Typical output impedance of 0.25Ω
- Operation from -40°C to +125°C
- Low output drift versus temperature, ensuring good stability over the entire temperature range
- Ultra-small SC-70 package available, offering a 40% smaller footprint than SOT-23-3
Applications
- Adjustable voltage reference for data converters
- Secondary side regulation in flyback Switch-Mode Power Supplies (SMPS)
- Zener replacement with low leakage current
- Voltage monitoring for power rails
- Comparator with integrated reference
Q & A
- What is the reference voltage of the TLVH431QDBZR?
The reference voltage (VREF) of the TLVH431QDBZR is approximately 1.24V.
- What is the adjustable output voltage range of the TLVH431QDBZR?
The output voltage can be adjusted from 1.24V to 18V using two external resistors.
- What are the temperature grades available for the TLVH431QDBZR?
The TLVH431QDBZR is characterized for operation from -40°C to +125°C.
- What is the typical output impedance of the TLVH431QDBZR?
The typical output impedance is 0.25Ω.
- What is the minimum cathode current required for regulation?
The minimum cathode current required for regulation is 60μA.
- Can the TLVH431QDBZR be used as a Zener diode replacement?
Yes, the TLVH431QDBZR can be used as a Zener diode replacement with low leakage current.
- What are some common applications of the TLVH431QDBZR?
Common applications include adjustable voltage references for data converters, secondary side regulation in flyback SMPS, voltage monitoring for power rails, and comparators with integrated references.
- What is the package type and pin count of the TLVH431QDBZR?
The TLVH431QDBZR is available in SOT-23-3 and other packages, with a pin count of 3.
- How does the TLVH431QDBZR handle temperature drift?
The TLVH431QDBZR has low output drift versus temperature, ensuring good stability over the entire temperature range.
- What are the reference voltage tolerances available for the TLVH431QDBZR?
The reference voltage tolerances are 0.5% (B grade), 1% (A grade), and 1.5% (Standard grade).
