Overview
The TL431ACLPE3 is a precision programmable reference voltage regulator produced by Texas Instruments. This three-terminal adjustable shunt regulator is known for its thermal stability and wide range of operating temperatures. It is part of the TL431 series, which offers various grades and packages to suit different application requirements.
The device is designed to provide a stable reference voltage, adjustable between approximately 2.5 V and 36 V, using two external resistors. This flexibility makes it an excellent choice for various power supply and voltage regulation applications.
Key Specifications
| Parameter | Unit | Min | Typ | Max |
|---|---|---|---|---|
| Reference Voltage Tolerance at 25°C | % | - | 1% (A Grade) | - |
| Adjustable Output Voltage | V | 2.5 | - | 36 |
| Operating Temperature Range | °C | -40 | - | 125 |
| Typical Temperature Drift | mV | - | 6 (C Temp), 14 (I Temp, Q Temp) | - |
| Output Impedance | Ω | - | 0.2 | - |
| Sink-Current Capability | mA | 1 | - | 100 |
| Cathode Voltage | V | - | - | 37 |
| Continuous Cathode Current Range | mA | -100 | - | 150 |
Key Features
- Reference voltage tolerance at 25°C: 0.5% (B grade), 1% (A grade), 2% (Standard grade)
- Adjustable output voltage from approximately 2.5 V to 36 V using two external resistors
- Operation from -40°C to 125°C, with different temperature grades available (C, I, Q)
- Typical temperature drift: 6 mV (C Temp), 14 mV (I Temp, Q Temp)
- Low output noise and typical output impedance of 0.2 Ω
- Sink-current capability: 1 mA to 100 mA
- Available in various packages including TO-92, SOIC, and others
Applications
- Rack server power supplies
- Industrial AC/DC power supplies
- AC inverter and variable frequency (VF) drives
- Servo drive control modules
- Notebook PC power adapter designs
- Onboard regulation and adjustable power supplies
- Switching power supplies
Q & A
- What is the TL431ACLPE3?
The TL431ACLPE3 is a precision programmable reference voltage regulator produced by Texas Instruments.
- What is the adjustable output voltage range of the TL431ACLPE3?
The output voltage can be adjusted between approximately 2.5 V and 36 V using two external resistors.
- What are the operating temperature ranges for the TL431ACLPE3?
The device operates from -40°C to 125°C, with different temperature grades available (C, I, Q).
- What is the typical output impedance of the TL431ACLPE3?
The typical output impedance is 0.2 Ω.
- What is the sink-current capability of the TL431ACLPE3?
The sink-current capability ranges from 1 mA to 100 mA.
- In what packages is the TL431ACLPE3 available?
The device is available in various packages, including TO-92, SOIC, and others.
- What are some common applications of the TL431ACLPE3?
Common applications include rack server power supplies, industrial AC/DC power supplies, AC inverter and VF drives, servo drive control modules, and notebook PC power adapter designs.
- How does the TL431ACLPE3 compare to Zener diodes?
The TL431ACLPE3 has active output circuitry that provides a very sharp turn-on characteristic, making it an excellent replacement for Zener diodes in many applications.
- What is the reference voltage tolerance at 25°C for the TL431ACLPE3?
The reference voltage tolerance at 25°C is 1% for the A grade.
- What is the typical temperature drift for the TL431ACLPE3?
The typical temperature drift is 6 mV (C Temp) and 14 mV (I Temp, Q Temp).
