Overview
The TL431CDRE4, produced by Texas Instruments, is a three-terminal adjustable precision shunt regulator. This device is part of the TL431 family, known for its high precision and thermal stability across various temperature ranges. The TL431CDRE4 is particularly suited for applications requiring adjustable output voltages and high stability.
It offers a reference voltage of approximately 2.5V and can be adjusted to output voltages ranging from Vref to 36V using two external resistors. This flexibility makes it an excellent choice for on-board regulation, adjustable power supplies, and switching power supplies.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Reference Voltage Tolerance at 25°C | 0.5% (B grade), 1% (A grade), 2% (Standard grade) | % |
| Adjustable Output Voltage | Vref to 36V | V |
| Operating Temperature Range | 0°C to 70°C (C grade) | °C |
| Typical Temperature Drift | 6 mV (C temp), 14 mV (I temp, Q temp) | mV |
| Output Impedance | 0.2 Ω (Typical) | Ω |
| Sink-Current Capability | 1 mA to 100 mA | mA |
| Cathode to Anode Voltage | 37 V | V |
| Reference Input Current Range | −0.05 to +10 mA | mA |
| Operating Junction Temperature | 150 °C | °C |
Key Features
- Adjustable output voltage from Vref (approximately 2.5V) to 36V using two external resistors.
- High precision with reference voltage tolerances of 0.5%, 1%, and 2% at 25°C for B, A, and standard grades, respectively.
- Low output noise and typical output impedance of 0.2 Ω.
- Sink-current capability ranging from 1 mA to 100 mA.
- Operates over a temperature range of 0°C to 70°C for the C grade.
- Active output circuitry providing a sharp turn-on characteristic, making it an excellent replacement for Zener diodes in many applications.
Applications
- On-board regulation and voltage referencing.
- Adjustable power supplies and switching power supplies.
- Rack server power systems.
- Industrial AC/DC power supplies.
- AC inverter and variable frequency (VF) drives.
- Servo drive control modules.
- Notebook PC power adapter designs.
Q & A
- What is the TL431CDRE4?
The TL431CDRE4 is a three-terminal adjustable precision shunt regulator produced by Texas Instruments.
- What is the adjustable output voltage range of the TL431CDRE4?
The output voltage can be adjusted from Vref (approximately 2.5V) to 36V using two external resistors.
- What are the reference voltage tolerances for the TL431CDRE4?
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 for the TL431CDRE4?
The TL431CDRE4 operates from 0°C to 70°C.
- What is the typical output impedance of the TL431CDRE4?
The typical output impedance is 0.2 Ω.
- What is the sink-current capability of the TL431CDRE4?
The sink-current capability ranges from 1 mA to 100 mA.
- Can the TL431CDRE4 replace Zener diodes in some applications?
- What are some common applications of the TL431CDRE4?
- What is the maximum operating junction temperature for the TL431CDRE4?
The maximum operating junction temperature is 150 °C.
- What is the maximum cathode to anode voltage for the TL431CDRE4?
The maximum cathode to anode voltage is 37 V.
