• ADP2108 layout considerations (high frequency switching regulator layout considerations)

    Improper layout can cause some IC's not to operate correctly, as an example let’s use the ADP2108.

    The part has a 3Mhz fixed operating frequency. You will want to place the input cap, output cap and inductor as close as physically possible to…

  • Another ADP2108 at +/- 1V

    Hi all,

    First of all: hobbyist here, first time using one of these switchers. I've not followed the recommended layout and possibly made some other mistakes.

    However...

    I am using an ADP2108AUJZ-3.3-R7 in a design that will be powered of a Li-ion…

  • RE: ADP2108 Quiescent Current Question

    This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.

    Thank you,
  • RE: ADP2108, ADP5300, ADP5302 100% duty operation input voltage

    This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.

    Thank you,
  • RE: ADP2108-3.0V outputting 1.0V (instead of fixed 3.0V)

    This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.

    Thank you,
  • RE: ADP2108-3.3 Cannot deliver more than 200mA

    Hi.

    I have applied the described solution, but the voltage is somewhat higher than the nominal and the load is only a resistance of 330 ohms. What could be the problem? (Vout will be 3.0 and it is 3.26 to 3.4 aprox.)

    Here is an image of the output voltage…

  • ADP2108模式切换问题

    我在使用ADP2108时发现该芯片PWM模式和连续模式的切换电流和手册上的不一样,手册上是80mA,但我实测在40mA至50mA就会发生切换,且不同芯片的切换电流不一样,一致性很差,请问这是什么原因,电路设计上需要注意什么吗,还是有批次的芯片就有问题。PS:已经过大批量测试,均如此。

    电路如下:

    除输入电容为47uF外其余均一致。

  • ADP2108-3.0 output at 1V

    Hi,

    I have the same situation as several other posters with an ADP2108-3.0 whose output sits at about 1V.  With the output at 1V, my circuit is drawing about 45 mA.

    I have added a 4.7 uF X5R 0603 input capacitor across Vin and ground, still doesn't work…