Power consumption calculation of LR9102G-25-AE5-R

To calculate the operating power consumption of LR9102G-25-AE5-R, we need to know two key parameters: load current (I_LOAD) and output voltage (V_OUT). At the same time, we also need to understand the basic power consumption characteristics of LDO (Low Dropout Linear Regulator).

The working power consumption (P_WORK) can usually be expressed as:

P_WORK = P_QUIESCENT + (I_LOAD × V_OUT)

Among them, P_QUIESCENT is the static power consumption of LDO, which refers to the power consumed when there is no load current. However, for specific models like LR9102G-25-AE5-R, the accurate value of static power consumption can usually only be found in the data manual. Due to my inability to directly access the data manual, I am unable to provide the exact value of P_QUIESCENT.

However, we can assume a typical static power consumption value for estimation. Assuming P_QUIESCENT is between tens of microwatts (μ W) and hundreds of microwatts, this is a common range of LDO static power consumption.

Now, let's assume some values of load current and output voltage for calculation:

Assuming the load current I2 LOAD is 100mA (0.1A)
Assuming the output voltage V_OUT is 2.5V (based on the "25" symbol in the model)
If we assume that the static power consumption P_QUIESCENT is 100 μ W (0.1mW), the operating power consumption can be estimated as:

P_WORK = 0.1mW + (0.1A × 2.5V)
= 0.1mW + 0.25W
= 0.2501W
= 250.1mW

It should be noted that this calculation is an estimation based on assumed static power consumption and load conditions. In practical applications, static power consumption and load current may vary depending on different operating conditions. Therefore, in order to obtain accurate power consumption values, it is recommended to refer to the data manual of LR9102G-25-AE5-R and measure according to the load conditions and working environment in actual applications.

In addition, it should be noted that the efficiency of LDOs is usually not 100%, as they generate a certain pressure drop and heat during operation. Therefore, when calculating power consumption, it is also necessary to consider these additional losses. However, in most cases, the above formula provides a reasonable method for estimating power consumption.