Overview
The TL431CLPM5, produced by Texas Instruments, is a three-terminal adjustable precision shunt regulator. This device is part of the TL431 family, known for its high accuracy and stability over a wide range of temperatures. The TL431CLPM5 is designed to provide an adjustable output voltage between approximately 2.495V and 36V, set by two external resistors. It is widely used in various applications requiring precise voltage regulation, such as on-board regulation, adjustable power supplies, and switching power supplies.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Reference Voltage Tolerance at 25°C | 0.5% (B grade) | 1% (A grade) | 2% (Standard grade) | % | |
| Adjustable Output Voltage | 2.495V | 36V | V | ||
| Operating Temperature Range | -40°C | 125°C | °C | ||
| Typical Temperature Drift | C temp | 6mV | mV | ||
| I temp, Q temp | 14mV | mV | |||
| Output Impedance | 0.2Ω | Ω | |||
| Sink-Current Capability | 1mA | 100mA | mA | ||
| Cathode-Anode Voltage | 37V | V | |||
| Reference Current | 0.05mA | 10mA | mA | ||
| Total Power Dissipation | Tamb ≤ 25°C | 350mW | mW |
Key Features
- Adjustable output voltage from approximately 2.495V to 36V, set by two external resistors.
- High accuracy with reference voltage tolerances of 0.5%, 1%, and 2% at 25°C for B, A, and standard grades, respectively.
- Low output drift versus temperature, ensuring good stability over the entire temperature range.
- Low output noise and typical output impedance of 0.2Ω.
- Sink-current capability from 1mA to 100mA.
- Operation from -40°C to 125°C, making it suitable for automotive, commercial, and military applications.
- Active output circuitry providing a sharp turn-on characteristic, making it an excellent replacement for Zener diodes in many applications.
Applications
- On-board voltage regulation.
- Adjustable power supplies.
- Switching power supplies.
- Automotive, commercial, and military applications requiring precise voltage regulation.
- Replacement for Zener diodes in various circuits.
Q & A
- What is the adjustable output voltage range of the TL431CLPM5?
The adjustable output voltage range is from approximately 2.495V to 36V, set by two external resistors.
- What are the reference voltage tolerances at 25°C for the TL431CLPM5?
The reference voltage tolerances are 0.5% (B grade), 1% (A grade), and 2% (Standard grade) at 25°C.
- What is the operating temperature range of the TL431CLPM5?
The operating temperature range is from -40°C to 125°C.
- What is the typical output impedance of the TL431CLPM5?
The typical output impedance is 0.2Ω.
- What is the sink-current capability of the TL431CLPM5?
The sink-current capability is from 1mA to 100mA.
- What are some common applications of the TL431CLPM5?
Common applications include on-board voltage regulation, adjustable power supplies, switching power supplies, and replacing Zener diodes in various circuits.
- How does the TL431CLPM5 ensure stability over temperature variations?
The device ensures stability through low output drift versus temperature, verifying good stability over the entire temperature range.
- What is the typical temperature drift for the TL431CLPM5?
The typical temperature drift is 6mV for C temp and 14mV for I and Q temps.
- What is the maximum cathode-anode voltage for the TL431CLPM5?
The maximum cathode-anode voltage is 37V.
- What is the total power dissipation limit for the TL431CLPM5 at ambient temperatures ≤ 25°C?
The total power dissipation limit is 350mW at ambient temperatures ≤ 25°C.
