Overview
The TL431IDBVRE4 is a three-terminal adjustable shunt regulator produced by Texas Instruments. This device is part of the TL431 series, known for its high thermal stability and adjustable output voltage. The TL431IDBVRE4 is particularly suited for applications requiring precise voltage regulation, such as on-board regulation, adjustable power supplies, and switching power supplies. It offers a sharp turn-on characteristic, making it an excellent replacement for Zener diodes in many scenarios.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Reference Voltage (Vref) | 2440 | 2495 | 2550 | mV |
| Reference Voltage Tolerance at 25°C | - | - | - | 0.5% (B grade), 1% (A grade), 2% (Standard grade) |
| Adjustable Output Voltage | - | - | - | Vref to 36 V |
| Operating Temperature Range | -40 | - | 125 | °C |
| Typical Temperature Drift | - | - | - | 6 mV (C temp), 14 mV (I temp, Q temp) |
| Output Impedance | - | 0.2 | 0.5 | Ω |
| Sink-Current Capability | 1 | - | 100 | mA |
| Package | - | - | - | SOT-23 (DBV), 5 pins |
Key Features
- Reference voltage tolerance at 25°C: 0.5% (B grade), 1% (A grade), 2% (Standard grade)
- Adjustable output voltage: Vref to 36 V
- Operation from −40°C to 125°C
- Typical temperature drift: 6 mV (C temp), 14 mV (I temp, Q temp)
- Low output noise
- Typical output impedance: 0.2 Ω
- Sink-current capability: 1 mA to 100 mA
- Active output circuitry with a sharp turn-on characteristic, making it an excellent replacement for Zener diodes
Applications
- On-board regulation
- Adjustable power supplies
- Switching power supplies
- Rack server power
- Industrial AC/DC
- AC inverter & VF drives
- Servo drive control module
- Notebook PC power adapter design
Q & A
- What is the TL431IDBVRE4 used for?
The TL431IDBVRE4 is used for precise voltage regulation in applications such as on-board regulation, adjustable power supplies, and switching power supplies.
- What is the adjustable output voltage range of the TL431IDBVRE4?
The adjustable output voltage range is from Vref (approximately 2.5 V) to 36 V.
- What are the reference voltage tolerances available for the TL431IDBVRE4?
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 TL431IDBVRE4?
The operating temperature range is from −40°C to 125°C.
- What is the typical output impedance of the TL431IDBVRE4?
The typical output impedance is 0.2 Ω.
- What is the sink-current capability of the TL431IDBVRE4?
The sink-current capability is from 1 mA to 100 mA.
- What package type is the TL431IDBVRE4 available in?
The TL431IDBVRE4 is available in the SOT-23 (DBV) package with 5 pins.
- What are some common applications of the TL431IDBVRE4?
Common applications include rack server power, industrial AC/DC, AC inverter & VF drives, servo drive control modules, and notebook PC power adapter designs.
- How does the TL431IDBVRE4 compare to Zener diodes?
The TL431IDBVRE4 has active output circuitry with a sharp turn-on characteristic, making it an excellent replacement for Zener diodes in many applications.
- What is the typical temperature drift of the TL431IDBVRE4?
The typical temperature drift is 6 mV (C temp) and 14 mV (I temp, Q temp).
