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Analog Devices μModule: Is it possible to make Vout=-15.5V from Vin=24V with LTM8026?

power management

The LTM8026 cannot be designed for Vin=24V to Vout=-15.5V.


The reason is that when outputting a negative voltage, the actual input voltage seen by the LTM8026 is Vin' = Vin-(-Vout).
If Vin=24V then Vin' = Vin-(-Vout) = 24V-(-15.5V) = 39.5V.
The maximum input rating of the LTM8026 is 36V, so with Vout=-15V, the input voltage is limited to 21V.
For details, please refer to the document linked below.


How to Generate a Negative Output Voltage from a Positive Input Using the DN1021 μmodule Buck Regulator

(Published in November 2021)

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