• LT3571 Current Limit

    Does the LT3571 limit the current from the APD pin to the level set by Rsense, or does it just shut off the switching regulator when the current exceeds the value set by Rsense? The latter would mean that the current from the APD pin could be greater…

  • LT3571 used as 60V @ <100mA DC Power Supply

    Hello,  I need to provide a nominal 50V DC supply to a device with <100mA of load current.  I have only max 10V supply available.  Can the LT3571 Boost converter be used in this (non-APD) application?  Looking through the available documents there are…

  • LT3571 Temperature Compensation

    Hi,

    We are designing APD bias circuit using LT3571, and I would like to consider the temperature compensation.

    According to the application note of LT3571(page11, Figure5), it says that "A more complicated and precise way to set the APD temperature coefficient…

  • RE: The parameters of the LT3571...

    Hi thomaswang,

    In shut down, the IC should not output any voltage or current through the APD pin, it should be 0V and 0A. If there is already voltage on the APD pin (for example when the device has been on, then shut down pin goes low), the voltage will…

  • Max output current for LT3571?

    I'm using the LT3571 as a bias generator for an APD running at 50v bias from a 5v power supply.  From back of the envelope calculations and the SPICE model, I had hoped to be able to get 8-10 mA from the LT3571, but after some experimentation, I am…

  • LT3571 for SiPM?

    As stated on the product page, the LT3571 is designed for APD (Avalanche Photodiode) Biasing purposes. My task is to build a small-scale SiPM Bias supply that can be externally controlled. Usually these are build by a low noise dc-dc followed by opamp…

  • Switching frequency of LT3571

    The LT3571 APD bias controller is described as 2MHz part. However the datasheet lists in table 1 that 2.5MHz is achieved for 2.67k RT. Which value is correct 2MHz or 2.5MHz.

  • about lt3571

    About chip lt3571, website can be promoted to the maximum voltage is 75 v, but in the use LTspice simulation found that as long as increase the resistance R2, output voltage will change, can even to hundreds of volts, I want to ask is, why this is, restricting…

  • LT3571 APD Bias circuit

    Hi All

    I want to use LT3571 as APD bias circuit for fiber sensor.

    I understand the LT3571 but where can I get output signal of APD.

    Normal APD operation is convertion input light signal to output current signal.

    Where can I get the output current…

  • Temperature compensation

    Hello,

    We were using the LT3571 to bias a SiPM, but without temperature compensation. Our next goal is to achieve temperature compensation. For that, we are using the circuit specified in datasheet and "DESIGN FEATURES Complete APD Bias Solution in 60mm…