Overview
The TLVH431ACDBVRG4 is a low-voltage, 3-terminal adjustable voltage reference produced by Texas Instruments. It is designed as a low-power counterpart to the TL431, offering a lower reference voltage of 1.24V and a lower minimum cathode current of 100µA. This device is suitable for a wide range of applications in industrial, automotive, telecommunications, and computing due to its adjustable output voltage from 1.24V to 18V.
The TLVH431ACDBVRG4 is characterized for operation from 0°C to 70°C and comes with initial reference voltage tolerances of 1% at 25°C. It features an internal reference and amplifier, enabling it to function as a shunt regulator, error amplifier, voltage clamp, or comparator with an integrated reference.
Key Specifications
| Parameter | Test Conditions | Unit | Min | Max | |
|---|---|---|---|---|---|
| Reference Voltage (VREF) | VKA = VREF, IK = 10mA, TA = 25°C | V | 1.221 | 1.24 | 1.259 |
| VREF Deviation over Full Temperature Range (VREF(dev)) | VKA = VREF, IK = 10mA | mV | 4 | - | 12 |
| Cathode Current Range (IK) | - | mA | 0.1 | - | 70 |
| Output Impedance (Zout) | - | Ω | - | 0.25 | - |
| Operating Temperature Range | - | °C | 0 | - | 70 |
Key Features
- Low-voltage operation down to 1.24V
- Adjustable output voltage from VREF (1.24V) to 18V using two external resistors
- Wide operating cathode current range: 100µA to 70mA
- Typical output impedance of 0.25Ω
- Specified thermal stability over industrial and commercial temperature ranges
- Ultra-small SC-70 package offering a 40% smaller footprint than SOT-23-3
- Reference voltage tolerances at 25°C: 1% for A grade
Applications
- Adjustable voltage reference for data converters
- Secondary side regulation in flyback SMPSs
- Zener replacement with low leakage current
- Voltage monitoring for power rails
- Comparator with integrated reference
Q & A
- What is the reference voltage of the TLVH431ACDBVRG4?
The reference voltage (VREF) of the TLVH431ACDBVRG4 is 1.24V.
- What is the adjustable output voltage range of the TLVH431ACDBVRG4?
The output voltage can be adjusted from 1.24V to 18V using two external resistors.
- What is the minimum cathode current required for the TLVH431ACDBVRG4?
The minimum cathode current (IK) required is 100µA.
- What are the operating temperature ranges for the TLVH431ACDBVRG4?
The device is characterized for operation from 0°C to 70°C.
- What is the typical output impedance of the TLVH431ACDBVRG4?
The typical output impedance is 0.25Ω.
- Can the TLVH431ACDBVRG4 be used as a comparator?
Yes, the TLVH431ACDBVRG4 can be used as a comparator when operating in open loop configuration.
- What are some common applications of the TLVH431ACDBVRG4?
Common applications include adjustable voltage references for data converters, secondary side regulation in flyback SMPSs, Zener replacement, voltage monitoring for power rails, and comparators with integrated references.
- What package options are available for the TLVH431ACDBVRG4?
The device is available in various packages including SOT-23-3, SOT-89, and SC-70.
- How does the TLVH431ACDBVRG4 differ from the TL431?
The TLVH431ACDBVRG4 has a lower reference voltage (1.24V vs 2.5V) and a lower minimum cathode current (100µA vs 1mA) compared to the TL431.
- What is the significance of the 'A' grade in TLVH431ACDBVRG4?
The 'A' grade indicates that the device has a reference voltage tolerance of 1% at 25°C.
