Abstract: Power efficient can empower an abiding operation in Very Large Scale Integration digital circuits. This design recommends a small potential loss and output voltage drop is competent by using Low Dropout Voltage Regulator (LDO). Low Dropout Voltage Regulator can act with a very poor Input–Output Differential Voltage. In battery regulated weightless device like Lithium Ion which need high rigor consistent tension mode and fast constant current process among absence of memory effect action in depressed quitter Regulators. This LDO consists of a floating-gate nMOS pass transistor, an attentively based error amplifier, and capacitive course for voltage reference generation along with feedback sensing. The power is the major parameter to be compared to various circuits between LDO and Li-Ion battery LDO based charger design. The LDO architecture results obtained from Tanner 16.3 software. The paper shows the completion inquiry of expected Li-Ion battery in LDO design are decisive in terms of cost function when compared to actual LDO arrangement of above perimeter.

Keywords: Low Dropout Voltage Regulator (LDO), Floating Gate Pass Transistor, Lithium-Ion Battery Charger, Band gap Reference circuit.