Overview
The ATL431BQDBZR is a 2.5-V low-IQ adjustable precision shunt regulator produced by Texas Instruments. This three-terminal device is designed for high precision and stability, making it suitable for a wide range of applications. It operates over a broad temperature range from -40°C to 125°C, ensuring reliability in various environmental conditions. The ATL431BQDBZR is part of the ATL43x series, known for its very-low operating current and adjustable regulated output voltage from 2.5V to 36V.
Key Specifications
| Parameter | Description |
|---|---|
| Manufacturer | Texas Instruments |
| Part Number | ATL431BQDBZR |
| Package | SOT-23 (DBZ) |
| Operating Temperature Range | -40°C to 125°C |
| Adjustable Output Voltage | 2.5V to 36V |
| Output Voltage Tolerance at 25°C | 0.5% (B grade), 1% (A grade), 2% (Standard grade) |
| Typical Temperature Drift | 5mV (–40°C to +85°C); 6mV (–40°C to +125°C) |
| Cathode Current Range | 35µA to 100mA |
| Output Impedance | 0.3Ω (Maximum) |
| RoHS Compliance | Yes |
Key Features
- Adjustable regulated output voltage from 2.5V to 36V
- Very-low operating current: IKA(min) = 35µA, IREF = 150nA (Maximum)
- Internally compensated for stability with no capacitive load required
- Low output impedance of 0.3Ω (Maximum)
- Active output circuitry with a sharp turn-on characteristic, suitable for replacing Zener diodes
- Low output noise
- Sink-current capability: 1mA to 100mA
Applications
- Secondary side regulation in flyback SMPSs
- Industrial, computing, consumer, and portable devices
- Adjustable voltage and current referencing
- Power management and power isolation
- Zener diode replacement in various applications
- On-board regulation, adjustable power supplies, and switching power supplies
Q & A
- What is the operating temperature range of the ATL431BQDBZR?
The operating temperature range is from -40°C to 125°C.
- What is the adjustable output voltage range of the ATL431BQDBZR?
The adjustable output voltage range is from 2.5V to 36V.
- What are the typical temperature drift values for the ATL431BQDBZR?
The typical temperature drift values are 5mV (–40°C to +85°C) and 6mV (–40°C to +125°C).
- What is the minimum cathode current required for regulation?
The minimum cathode current required for regulation is 35µA.
- Is the ATL431BQDBZR RoHS compliant?
Yes, the ATL431BQDBZR is RoHS compliant.
- What is the package type of the ATL431BQDBZR?
The package type is SOT-23 (DBZ).
- What are some common applications of the ATL431BQDBZR?
Common applications include secondary side regulation in flyback SMPSs, industrial and consumer devices, adjustable voltage and current referencing, and Zener diode replacement.
- What is the output impedance of the ATL431BQDBZR?
The output impedance is 0.3Ω (Maximum).
- Does the ATL431BQDBZR require an external capacitor for stability?
No, the ATL431BQDBZR is internally compensated for stability and does not require an external capacitor.
- What is the sink-current capability of the ATL431BQDBZR?
The sink-current capability is from 1mA to 100mA.
