ATL431 adjustable shunt regulator evaluation module


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The ATL431EVM-001 evaluation module (EVM) features the functionality and adjustability of the ATL431 by letting you program the cathode voltage with various resistor values. You can also set the cathode current using the various resistors in series with the supply. Resistors can be soldered to the board in addition to the resistors available on the EVM to customize the board to your application. The EVM lets you check the stability of the ATL431 with more than 12 output capacitors that can be applied between the anode and cathode with a jumper. The EVM is also compatible with TL431, TL431LI, ATL431LI, LM431 and TLVH432 products in the SOT23-3 package.

  • Adjustable regulated output from 2.5 V to 36 V 
  • Very-low operating current: IKA(min) = 35 µA (max) and IREF = 150 nA (max)
  • Extended cathode current range from 35 µA to 100 mA
  • Low output impedance of 0.3 Ω (max)
  • Small form factor
  • Ease of use
  • Multiple gain setting options
  • Stability test availability
Shunt voltage references
ATL431 2.5-V low-IQ adjustable precision shunt regulator ATL431LI Low-IQ programmable shunt regulator offered in an ultra-small DQN package ATL432 2.5-V precision programmable shunt regulator LM431 2%, 1%, or 0.5% accuracy, adjustable precision Zener shunt regulator TL431 Adjustable precision shunt regulator TL431LI Adjustable precision shunt regulator with optimized reference current (pin layout: KRA) TLVH432 1.5% low-voltage wide-operating current adjustable precision shunt regulator (reverse pinout)
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ATL431EVM-001 — ATL431 adjustable shunt regulator evaluation module

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Technical documentation

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Type Title Date
* EVM User's guide ATL431EVM User's Guide 28 Apr 2015
Certificate ATL431EVM-001 EU Declaration of Conformity (DoC) 02 Jan 2019
Application note Designing with the ATL431LI 27 Nov 2018
Technical article Can overcurrent protection be simple and precise, while minimizing cost? PDF | HTML 31 Jul 2015

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