TLV431CLPM datasheet by Texas Instruments

TLV431CLPM Frequently Asked Questions (FAQs)

• What is the recommended layout and placement for the TLV431CLPM to minimize noise and ensure stability?
  It is recommended to place the TLV431CLPM close to the voltage regulator output, with a low-impedance path to the output capacitor. The device should be placed on a quiet analog ground plane, away from high-current switching nodes and digital signals. Additionally, the input and output pins should be routed away from each other to minimize capacitive coupling.
• How do I ensure the TLV431CLPM is stable and does not oscillate in my design?
  To ensure stability, the TLV431CLPM requires a minimum output capacitance of 10nF, and the output capacitor should be placed as close as possible to the device. Additionally, the device should be decoupled from the input voltage with a 10uF or larger capacitor. The device's output should also be buffered with a low-impedance output stage, such as an op-amp, to prevent oscillation.
• What is the maximum allowed voltage on the reference input (REF) pin?
  The maximum allowed voltage on the reference input (REF) pin is 5.5V. Exceeding this voltage can cause damage to the device.
• Can I use the TLV431CLPM as a voltage reference for an ADC or DAC?
  Yes, the TLV431CLPM can be used as a voltage reference for an ADC or DAC. However, it is recommended to buffer the output of the TLV431CLPM with a low-noise, low-impedance op-amp to ensure a stable and accurate reference voltage.
• How does the TLV431CLPM behave during power-up and power-down sequences?
  During power-up, the TLV431CLPM's output voltage will ramp up slowly, typically within 10ms. During power-down, the output voltage will decay slowly, typically within 10ms. It is recommended to ensure that the device's input voltage is stable and within the recommended operating range before using the output voltage as a reference.