AX3503 Datasheet - AXElite

AX3503 1A Synchronous Step-Down Converter

AX3503 is a high efficiency monolithic synchronous buck regulator using a constant frequency, current mode architecture. The device is available in an adjustable version. Supply current with no load is 35uA and drops to <1uA in shutdown. The 2.5V to 6V input voltage range makes AX3503 ideally suited.

AX3503 Features

* 2.5V to 6V Input Voltage Range High Efficiency: Up to 94% 1.5MHz Constant Frequency Operation 1A Output Current at VIN=3.6V and VOUT=1.8V Quiescent Current: 35uA (input < 4.2V) No Schottky Diode Required 100% Duty Cycle in Dropout 0.6V Reference Allows Low Output Voltages Current Mode Operation for

AX3503-AXElite.pdf