Texas Instruments ATL431
The ATL431 and ATL432 are three-terminal adjustable shunt regulators, with specified thermal stability over applicable automotive, commercial, and industrial temperature ranges. The output voltage can be set to any value between Vref (approximately 2.5 V) and 36 V, with two external resistors. These devices have a typical output impedance of 0.05 Ω.| Part No. | ATL431 |
|---|---|
| Datasheet | ATL431 Download |
| Manufacturer |  Texas Instruments |
| Description | 2.5-V Low Iq Adjustable Precision Shunt Regulator |
| Buy | Stock & Price |
FEATURES
●1 Adjustable Regulated Output of 2.5 V to 36 V● Very-Low Operating Current – IKA(min) = 35 µA (Max) – IREF = 150 nA (Max)
● Internally Compensated for Stability – Stable With No Capacitive Load
● Reference Voltage Tolerances at 25°C – 0.5% for B Grade – 1% for A Grade
● Typical Temperature Drift – 5 mV (–40°C to +85°C); I Version – 6 mV (–40°C to +125°C); Q Version
● Extended Cathode Current Range 35 µA to 100 mA
● Low Output Impedance of 0.3 Ω (Max) 2
APPLICATIONS
● Secondary Side Regulation in Flyback SMPSs● Industrial, Computing, Consumer, and Portables
● Adjustable Voltage and Current Referencing
● Power Management
● Power Isolation
● Zener Replacement 3
DESCRIPTION
Active output circuitry provides a very sharp turn-on characteristic, making these devices excellent replacements for Zener diodes in many applications, such as onboard regulation, adjustable power supplies, and switching power supplies. The ATL43x has > 20x improvement cathode current range over it's TL43x predecessor.
