Overview
The TLV431ALPRAG, part of the TLV431 series, is a precision low-voltage adjustable shunt regulator produced by onsemi. This device is designed to operate over a wide voltage range of 1.24 V to 16 V, making it highly versatile for various applications. The TLV431A series, which includes the TLV431ALPRAG, features a guaranteed reference accuracy of ±1.0% at 25°C and ±2.0% over the entire industrial temperature range of -40°C to 85°C. This precision and stability make it an excellent replacement for zener diodes in many circuits requiring a precise reference voltage.
Key Specifications
| Characteristic | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Reference Voltage (at 25°C) | Vref | 1.228 | 1.240 | 1.252 | V |
| Reference Voltage Tolerance (at 25°C) | - | - | ±1.0% | - | % |
| Cathode to Anode Voltage | VKA | - | - | 18 | V |
| Cathode Current Range | IK | -20 | - | 25 | mA |
| Reference Input Current Range | Iref | 0.05 | - | 10 | mA |
| Dynamic Output Impedance | - | - | 0.20 Ω | - | Ω |
| Operating Junction Temperature | - | - | -40°C to 85°C | - | °C |
Key Features
- Programmable Output Voltage Range of 1.24 V to 16 V
- Voltage Reference Tolerance: ±1.0% for A Series, ±0.5% for B Series, and ±0.2% for C Series
- Sharp Low Current Turn-On Characteristic
- Low Dynamic Output Impedance of 0.20 Ω from 100 μA to 20 mA
- Wide Operating Current Range of 50 μA to 20 mA
- Available in micro miniature TSOP-5, SOT-23-3, and TO-92-3 packages
- Pb-Free and Halide-Free Devices
- AEC-Q100 Qualified and PPAP Capable for automotive and other applications requiring unique site and control change requirements
Applications
- Low Output Voltage (3.0 V to 3.3 V) Switching Power Supply Error Amplifier
- Adjustable Voltage or Current Linear and Switching Power Supplies
- Voltage Monitoring
- Current Source and Sink Circuits
- Analog and Digital Circuits Requiring Precision References
- Low Voltage Zener Diode Replacements
- Power Supplies
- Smart Phone Charger / Adapters
Q & A
- What is the voltage range of the TLV431ALPRAG?
The TLV431ALPRAG can be programmed over a wide voltage range of 1.24 V to 16 V.
- What is the reference voltage tolerance of the TLV431A series?
The reference voltage tolerance for the TLV431A series is ±1.0% at 25°C and ±2.0% over the entire industrial temperature range.
- What are the typical packages available for the TLV431ALPRAG?
The device is available in micro miniature TSOP-5, SOT-23-3, and TO-92-3 packages.
- What is the dynamic output impedance of the TLV431ALPRAG?
The dynamic output impedance is 0.20 Ω from 100 μA to 20 mA.
- Can the TLV431ALPRAG be used as a replacement for zener diodes?
Yes, the TLV431ALPRAG is an excellent replacement for zener diodes in many applications due to its sharp low current turn-on characteristic and low dynamic impedance.
- What are some common applications of the TLV431ALPRAG?
Common applications include low output voltage switching power supplies, adjustable voltage or current power supplies, voltage monitoring, and current source and sink circuits.
- Is the TLV431ALPRAG suitable for automotive applications?
Yes, the device is AEC-Q100 Qualified and PPAP Capable, making it suitable for automotive and other applications requiring unique site and control change requirements.
- What is the operating junction temperature range of the TLV431ALPRAG?
The operating junction temperature range is -40°C to 85°C.
- Can the TLV431ALPRAG be used in isolated feedback circuits?
Yes, when combined with an optocoupler, the TLV431ALPRAG can be used as an error amplifier for controlling the feedback loop in isolated low output voltage switching power supplies.
- Is the TLV431ALPRAG Pb-Free and Halide-Free?
Yes, the device is Pb-Free and Halide-Free.
