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Strike LTC3307A with a voltage > 6V

Category: Hardware
Product Number: LTC3307A

Hello,

Three questions:

LTC3307A is a buck converter and is specified as a 5V, 3A part.
1. Does it mean it can deliver 15W of Pout?


At another part in the Datasheet, a ref design shows output as 1.2V @3A 
2. Does it mean its output power is 3.6W?

I have used it as a buck going from 5V to 3V.
As part of my analysis, I need to hit Vin with a voltage higher than its Absolute Maximum Value, which is 6V.
In LTspice, I have used a PWL source as Vin, which starts at 5V and later it hits 10V.

After simulation, no change happens, i.e. Vin =10V & Vout =3V.

3. Does it mean the part can work when Vin = 10V?

Thank you,
Ray

Top Replies

    •  Analog Employees 
    May 10, 2022 +2 verified
    LTC3307A is a buck converter and is specified as a 5V, 3A part.
    1. Does it mean it can deliver 15W of Pout?

    Yes.

    At another part in the Datasheet, a ref design shows output as 1…
Parents
  • LTC3307A is a buck converter and is specified as a 5V, 3A part.
    1. Does it mean it can deliver 15W of Pout?

    Yes.

    At another part in the Datasheet, a ref design shows output as 1.2V @3A 
    2. Does it mean its output power is 3.6W?

    Yes.

    3. Does it mean the part can work when Vin = 10V?

    No. You must never exceed the absolute maximum of a part or it might get broken. The recommended operating range of the part is from 2.25V to 5.5V only. Also operating on the absolute maximum will degrade the part and might make it malfunction.

    The LTSpice simulation does not consider the absolute maximum of the rating. It is only used for simulating the design of the converter. When designing, you can use LTPowerCAD to help with your design.

    Regards,

    Jhun

Reply
  • LTC3307A is a buck converter and is specified as a 5V, 3A part.
    1. Does it mean it can deliver 15W of Pout?

    Yes.

    At another part in the Datasheet, a ref design shows output as 1.2V @3A 
    2. Does it mean its output power is 3.6W?

    Yes.

    3. Does it mean the part can work when Vin = 10V?

    No. You must never exceed the absolute maximum of a part or it might get broken. The recommended operating range of the part is from 2.25V to 5.5V only. Also operating on the absolute maximum will degrade the part and might make it malfunction.

    The LTSpice simulation does not consider the absolute maximum of the rating. It is only used for simulating the design of the converter. When designing, you can use LTPowerCAD to help with your design.

    Regards,

    Jhun

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