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A smart energy meter is an advanced version of a traditional electricity meter that records energy consumption in real-time and communicates data to consumers and utility companies. It helps in better energy management, cost savings and efficient electricity distribution.

By incorporating a low quiescent current and low drop-out voltage LDO, the smart energy meter can achieve long battery life, high power efficiency, reliability, and cost-effectiveness, all of which are essential for the practical deployment and sustainable operation of energy meters in a wide range of applications.

Extended battery life is a common design requirement in the smart energy meter. Using an LDO is a common way to generate a regulated voltage from the battery. This is especially true with a single-cell lithium-ion (Li-ion) battery that outputs 4.2V when fully charged. The LDI734C3.3EN specifies a typical dropout voltage of 170mV when the output current is 300mA and the output voltage is 3.3V with integrated current limiting and thermal overload protection. The low quiescent current 60uA extend the battery life. Last but not least, the LDI734C3.3EN is a capacitor free LDO, i. e. it allows stable operation without the need for external capacitors.