I don't see in the datasheet where it shows the minimum voltage difference between the VIN and VOUT for the various switchers and LDOs on the PF0100. I assume it is in the manual but I cannot find it anywhere. It just says VIN must be "higher" than VOUT but does not say by how much. I would like to run the VIN at 3.3V and still get 3.15 out but I don't know if that is possible.
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Hi Nathan,
Please see MMPF0100 datasheet rev 7.0. This information is kind of hidden, but it's all there:
- VGEN1 and VGEN2: Are not a problem. Max output is 1.55V and min input is 1.75V.
- VGEN3 - VGEN6: Input must be 0.25V higher than the output.
- SW1: Is not a problem since max output is 1.875V and min input is 2.8.
- SW2 - SW4: Can do 100% duty cycle. The datasheet has notes on how to calculate the headroom required. You can find these notes below each switcher electrical characteristics table:
The higher output voltages available depend on the voltage drop in the conduction path as given by the following equation:
(VINSW2 - VSW2) = ISW2* (DCR of Inductor +RONSW2P + PCB trace resistance).
Best regards.
Jorge.
Hi Nathan,
Please see MMPF0100 datasheet rev 7.0. This information is kind of hidden, but it's all there:
- VGEN1 and VGEN2: Are not a problem. Max output is 1.55V and min input is 1.75V.
- VGEN3 - VGEN6: Input must be 0.25V higher than the output.
- SW1: Is not a problem since max output is 1.875V and min input is 2.8.
- SW2 - SW4: Can do 100% duty cycle. The datasheet has notes on how to calculate the headroom required. You can find these notes below each switcher electrical characteristics table:
The higher output voltages available depend on the voltage drop in the conduction path as given by the following equation:
(VINSW2 - VSW2) = ISW2* (DCR of Inductor +RONSW2P + PCB trace resistance).
Best regards.
Jorge.