Overview
The TL431CKTPR is a three-terminal adjustable shunt regulator produced by Texas Instruments. It is part of the TL431 and TL432 series, known for their specified thermal stability over a wide range of temperature conditions, including automotive, commercial, and military environments. The device allows for adjustable output voltage settings between approximately 2.5V and 36V using two external resistors. This makes it an excellent replacement for Zener diodes in various applications such as on-board regulation, adjustable power supplies, and switching power supplies.
Key Specifications
| Specification | Value |
|---|---|
| Package | TO-92 (LP), SOT-23-3 (DBZ), etc. |
| Pins | 3 |
| Operating Temperature Range (°C) | −40°C to 125°C |
| Reference Voltage Tolerance at 25°C | 0.5% (B grade), 1% (A grade), 2% (Standard grade) |
| Adjustable Output Voltage | Vref (approximately 2.5V) to 36V |
| Typical Temperature Drift | 6mV (C temp), 14mV (I temp, Q temp) |
| Typical Output Impedance | 0.2Ω |
| Sink-Current Capability | 1mA to 100mA |
Key Features
- Adjustable output voltage: Vref to 36V with two external resistors.
- Operation from −40°C to 125°C.
- Low output noise.
- Typical output impedance of 0.2Ω.
- Sink-current capability: 1mA to 100mA.
- Active output circuitry with a very sharp turn-on characteristic.
- Available in three grades with initial tolerances of 0.5%, 1%, and 2% at 25°C.
Applications
- On-board regulation.
- Adjustable power supplies.
- Switching power supplies.
- Replacement for Zener diodes in various applications.
Q & A
- What is the TL431CKTPR? The TL431CKTPR is a three-terminal adjustable shunt regulator produced by Texas Instruments.
- What is the adjustable output voltage range of the TL431CKTPR? The output voltage can be set to any value between approximately 2.5V and 36V using two external resistors.
- What are the operating temperature ranges for the TL431CKTPR? The device operates from −40°C to 125°C.
- What are the reference voltage tolerances for the TL431CKTPR? The device is available in three grades with initial tolerances of 0.5%, 1%, and 2% at 25°C.
- What is the typical output impedance of the TL431CKTPR? The typical output impedance is 0.2Ω.
- What is the sink-current capability of the TL431CKTPR? The sink-current capability ranges from 1mA to 100mA.
- What are some common applications of the TL431CKTPR? Common applications include on-board regulation, adjustable power supplies, and switching power supplies.
- Can the TL431CKTPR replace Zener diodes? Yes, the TL431CKTPR can replace Zener diodes in many applications due to its sharp turn-on characteristic and adjustable output voltage.
- What are the different packages available for the TL431CKTPR? The device is available in various packages such as TO-92 (LP), SOT-23-3 (DBZ), etc.
- What is the typical temperature drift of the TL431CKTPR? The typical temperature drift is 6mV (C temp) and 14mV (I temp, Q temp).
