Overview
The ATL431AIDBZR is a 2.5-V low-IQ adjustable precision shunt regulator produced by Texas Instruments. This three-terminal device is designed for thermal stability across automotive, commercial, and industrial temperature ranges. It offers an adjustable regulated output voltage between 2.5V and 36V, set using two external resistors. The ATL431AIDBZR is known for its very low operating current and sharp turn-on characteristic, making it an excellent replacement for Zener diodes in various applications.
Key Specifications
| Parameter | Value |
|---|---|
| Package Type | SOT-23 (DBZ) |
| Pins | 3 |
| Operating Temperature Range (°C) | -40 to 85 |
| Reference Voltage (V) | Adjustable (2.5V to 36V) |
| Minimum Cathode Current for Regulation (µA) | 20 |
| Maximum Cathode Current (mA) | 100 |
| Typical Output Impedance (Ω) | 0.05 |
| Maximum Output Impedance (Ω) | 0.3 |
| Initial Accuracy (Max) (%) | 0.5 (B Grade), 1 (A Grade) |
| Temperature Coefficient (Typ) (ppm/°C) | 34 |
| Temperature Coefficient (Max) (ppm/°C) | 92 |
Key Features
- Adjustable regulated output of 2.5V to 36V
- Very-low operating current (IKA(min) = 35µA, IREF = 150nA)
- Internally compensated for stability
- Stable with no capacitive load
- Low output impedance of 0.3Ω (Maximum)
- Extended cathode current range of 35µA to 100mA
- Typical temperature drift of 5mV (–40°C to +85°C) for I Version and 6mV (–40°C to +125°C) for Q Version
Applications
The ATL431AIDBZR is suitable for a variety of applications, including:
- Onboard regulation
- Adjustable power supplies
- Switching power supplies
- Replacing Zener diodes in many applications due to its sharp turn-on characteristic
Q & A
- What is the operating temperature range of the ATL431AIDBZR?
The operating temperature range is -40°C to 85°C for the I version and -40°C to 125°C for the Q version.
- What is the adjustable output voltage range of the ATL431AIDBZR?
The output voltage can be set to any value between 2.5V and 36V using two external resistors.
- What is the typical output impedance of the ATL431AIDBZR?
The typical output impedance is 0.05Ω, with a maximum of 0.3Ω.
- What are the initial accuracy tolerances for the ATL431AIDBZR?
The initial accuracy tolerances are 0.5% for B Grade and 1% for A Grade at 25°C.
- What is the minimum cathode current required for regulation?
The minimum cathode current required for regulation is 20µA.
- What is the maximum cathode current of the ATL431AIDBZR?
The maximum cathode current is 100mA.
- Is the ATL431AIDBZR stable with no capacitive load?
- What are some common applications of the ATL431AIDBZR?
- How does the ATL431AIDBZR compare to its predecessor, the TL43x?
20x improvement in cathode current range over its TL43x predecessor and is stable with a wider range of load capacitance types and values. - What is the package type and pin count of the ATL431AIDBZR?
