LDO (Low Dropout) is a linear voltage regulator used to adjust the input voltage to a stable output voltage. The output power of the LDO can be calculated by the following formula:
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Output power = (output voltage - input voltage) x output current
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of which
- The output voltage is the stable output voltage of the LDO.
- Input voltage is the input voltage that supplies the LDO.
- Output current Indicates the load current flowing out of the LDO output.
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This formula is based on the following assumptions:
- The efficiency of LDO is ignored, that is, it is considered 100% efficient.
- LDO's load current is stable and does not change with time.
- The difference between the input Voltage and the output voltage is included in the LDO's Dropout Voltage.
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Please note that the output power of the LDO should not exceed its design specification. To ensure that the LDO is working properly, carefully refer to the relevant data book for its maximum permissible output power and other metrics. In addition, the thermal design of the LDO should be considered to ensure that it can effectively dissipate heat under high power consumption conditions and avoid overtemperature problems.