Overview
The TLVH431ACDBZRG4 is a low-voltage adjustable precision shunt regulator produced by Texas Instruments. This device is part of the TLVH431 series, known for its low power consumption and high precision. It operates with a reference voltage of 1.24V, making it suitable for applications requiring lower voltage adjustability. The TLVH431 is a versatile component that can function as a voltage reference, error amplifier, voltage clamp, or comparator with an integrated reference.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Reference Voltage (VREF) | 1.24 | V |
| Output Voltage Range (VO) | 1.24 to 18 | V |
| Cathode Current Range (Ik) | 100µA to 70mA | A |
| Output Impedance (Typical) | 0.25Ω | Ω |
| Temperature Range | -40°C to +125°C (Q Grade) | °C |
| Reference Voltage Tolerance (at 25°C) | ±0.5% (B Grade), ±1% (A Grade), ±1.5% (Standard Grade) | % |
| Package Type | SOT-23-3, SC-59, TO-236-3 | - |
| Mounting Type | Surface Mount | - |
Key Features
- Low-voltage operation down to 1.24V
- Adjustable output voltage from VREF to 18V using two external resistors
- Wide operating cathode current range: 100µA to 70mA
- Low output impedance: 0.25Ω typical
- Operating temperature range: -40°C to +125°C for Q Grade, -40°C to +85°C for I Grade, and 0°C to 70°C for C Grade
- Ultra-small SC-70 package offers a 40% smaller footprint than SOT-23-3
- Internal reference and amplifier for precise voltage regulation
- Can be used as a comparator, error amplifier, or voltage clamp
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 TLVH431ACDBZRG4?
The reference voltage (VREF) is 1.24V.
- What is the adjustable output voltage range of the TLVH431ACDBZRG4?
The output voltage can be adjusted from 1.24V to 18V using two external resistors.
- What is the operating temperature range for the Q Grade TLVH431ACDBZRG4?
The operating temperature range for the Q Grade is -40°C to +125°C.
- What are the typical applications of the TLVH431ACDBZRG4?
Typical applications include adjustable voltage references for data converters, secondary side regulation in flyback SMPSs, Zener replacement, voltage monitoring for power rails, and as a comparator with an integrated reference.
- What is the minimum cathode current required for the TLVH431ACDBZRG4 to operate?
The minimum cathode current (Ik(min)) required is 100µA.
- What are the available package types for the TLVH431ACDBZRG4?
The available package types are SOT-23-3, SC-59, and TO-236-3.
- How does the TLVH431ACDBZRG4 behave when used in a closed-loop configuration?
In a closed-loop configuration, the TLVH431ACDBZRG4 behaves as an error amplifier, regulating a fixed voltage or current by relating the output voltage back to the reference pin.
- What is the significance of the different grades (B, A, Standard) of the TLVH431ACDBZRG4?
The different grades denote the reference voltage tolerance at 25°C: 0.5% for B Grade, 1% for A Grade, and 1.5% for Standard Grade.
- Can the TLVH431ACDBZRG4 be used as a comparator?
- What is the typical output impedance of the TLVH431ACDBZRG4?
The typical output impedance is 0.25Ω.
