ATL431AQDBZRG4 Texas Instruments Integrated Circuit (SOT23 (3-Pin)) In Stock
The ATL431AQDBZRG4 is a precision adjustable shunt voltage regulator with output range of 2.5V to 36V in a compact SOT-23 3-pin package. Features sharp turn-on characteristics with low reference voltage tolerance for accurate voltage regulation. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- SOT23 (3-Pin)
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- ATL431AQDBZRG4 Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Adjustable output voltage from 2.5V to 36V set by two external resistors for flexible power supply feedback
- Precision shunt regulator with tight reference voltage accuracy enabling high-quality voltage regulation loops
- Ultra-compact SOT-23 3-pin package ideal for space-constrained PCB designs in portable and handheld equipment
- Low cathode current enabling stable regulation at low standby power conditions
Applications
The ATL431AQDBZRG4 adjustable shunt regulator is widely used as the feedback reference in isolated and non-isolated switching power supplies, where it works with an optocoupler to regulate output voltage with high precision. It suits portable consumer electronics, telecom equipment, and industrial power supplies requiring a stable 2.5V to 36V reference over temperature. The device also serves as a precision voltage reference, overvoltage detection circuit, or general-purpose shunt regulator in battery management and linear regulator designs.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for ATL431AQDBZRG4:
Frequently Asked Questions
What is the output voltage range of the ATL431AQDBZRG4?
The ATL431AQDBZRG4 provides an adjustable output voltage from 2.5V to 36V, set by an external resistor divider connected to the reference pin. This flexibility allows a single device to serve as the feedback element across a wide range of power supply output voltages.
How is the ATL431AQDBZRG4 used in switching power supplies?
In isolated flyback converters, the ATL431AQDBZRG4 senses the output voltage and drives an optocoupler to signal the primary-side PWM controller to adjust duty cycle. This configuration achieves tight voltage regulation without a direct electrical connection between output and input, ensuring safety and isolation.
What package does the ATL431AQDBZRG4 come in?
The ATL431AQDBZRG4 is housed in a SOT-23 3-pin surface-mount package, one of the smallest standard IC packages available. This tiny footprint is ideal for mobile devices, wearables, and compact power supply designs where board space is at a premium.
What does the 'Q' in ATL431AQDBZRG4 indicate?
The 'Q' in the part number indicates the ATL431AQDBZRG4 is an automotive-grade device, qualified to AEC-Q100 standards for use in automotive electronics applications requiring enhanced reliability, extended temperature range, and stringent quality testing beyond commercial grades.
Can the ATL431AQDBZRG4 be used as a fixed voltage reference?
Yes, by connecting the reference pin directly to the cathode, the ATL431AQDBZRG4 operates as a fixed 2.5V shunt reference, similar to a precision Zener diode. This configuration is useful in ADC reference circuits, comparator threshold setting, and voltage monitoring applications.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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