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Inversion circuit from 3.3V to -12V

Other Parts Discussed in Thread: TIDA-01423, TPS62136

Hello,

I am considering a circuit with the following specifications.
In the reference circuit (TIDA-01423), the circuit using TPS62136 is applicable.
However, TPS62136 is not a Q1 grade product.
Are there any products that meet the following specifications?
Also, if you have a reference design, please provide it to me.

(specification)
VIN : 3.3V
VOUT : -12V
IOUT : 100mA
Q1 grade required

Best regards,

  •  

    In order for your 3.3V to -12V converter to start-up, you need a converter that can run at an input voltage under 3.3V, and to handle the inverting Buck voltage, it will need to withstand an input voltage greater than 15.3V on the input and enough available duty cycle to support a 15.3V to 12V conversion ration.

    Try taking a look at the LM2734Z-Q1 and LM2734-Q1

    Both are Q100 rated, 3V to 20V synchronous BUCK converters with 1A current ratings.