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ATL431

Texas Instruments
Part Number ATL431
Manufacturer Texas Instruments
Description 2.5-V Low Iq Adjustable Precision Shunt Regulator
Published Jan 1, 2020
Detailed Description Product Folder Order Now Technical Documents Tools & Software Support & Community Reference Design ATL431, ATL432 ...
Datasheet PDF File ATL431 PDF File

ATL431
ATL431

Overview
Product Folder Order Now Technical Documents Tools & Software Support & Community Reference Design ATL431, ATL432 SLVSCV5D – MARCH 2015 – REVISED OCTOBER 2016 ATL431, ATL432 2.
5-V Low Iq Adjustable Precision Shunt Regulator 1 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 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.
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.
It also is stable with a wider range of load capacitance types and values.
ATL431 and ATL432 are the exact same parts but with different pinouts and order numbers.
The ATL43x is offered in two grades, with initial tolerances (at 25°C) of 0.
5%, 1%, for the B and A grade, respectively.
In addition, low output drift vs temperature ensures consistent voltage regulation over the entire temperature range...


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