ATL431LIBQDBZR

The ATL43xLI devices are 3-terminal adjustable shunt regulators that meet specified thermal stability across applicable automotive-grade and commercial-grade temperature ranges. The output voltage can be set to any value between Vref (approximately 2.5V) and 36V using two external resistors. These devices feature a typical output impedance of 0.3Ω. The active output circuitry provides a very sharp turn-on characteristic, making these devices excellent replacements for Zener diodes in many applications, including on-board voltage regulation, adjustable power supplies, and switching power supplies. This device is a pin-to-pin replacement for the TL431LI and TL432LI with a lower minimum operating current, helping to reduce system power consumption. The ATL432LI device offers identical functionality and electrical characteristics to the ATL431LI device, but with a different DBZ package pinout. The ATL431LI device is available in two grades, A and B, with initial tolerances of 1% and 0.5% at 25°C, respectively. In addition, low output temperature drift ensures excellent stability across the entire temperature range. The ATL43xLIxQ devices are rated for an operating temperature range of -40°C to +125°C.

Applications

• Adjustable voltage and current reference
• Secondary-side regulation in flyback SMPS
• Zener diode replacement
• Voltage monitoring
• Precision constant sink/source current
• Comparator with integrated reference

Key features

• Reference voltage tolerance at 25°C: 0.5% (Grade B), 1% (Grade A)
• Minimum typical output voltage: 2.5V
• Adjustable output voltage: Vref to 36V
• Operating range: -40°C to +125°C (Q-grade temperature)
• Maximum temperature drift: 17mV (I-grade temperature), 27mV (Q-grade temperature)
• Output impedance: 0.3Ω typical
• Sink current capability: Imin = 0.1mA (max), IKA = 15mA (max)
• Reference input current IREF: 0.4μA (max)
• Reference input current deviation over full temperature range II(dev): 0.3μA (max)