FAN5602

www.fairchildsemi.com FAN5602 Universal (Step-Up/Step-Down) Charge Pump Regulated DC/DC Converter Features Low Noise Constant Frequency Operation at Heavy Load High Efficiency Pulse-Skip (PFM) Operation at Light Load Adaptive Seven Switch Configurations (1:3, 1:2, 2:3, 1:1, 3:2, 2:1, 3:1) 92% Peak Efficiency Input Voltage Range: 2.7V to 5.5V Output Current:3.3V, 200mA at VIN = 3.6V ±3% Output Voltage Accuracy ICC < 1µA in Shutdown Mode 1MHz Operating Frequency Shutdown Isolates Output from Input Soft-Start Limits Inrush Current at Start-up Short Circuit and Over Temperature Protection Minimum External Component Count No Inductors Description The FAN5602 is a universal switched capacitor DC/DC converter capable of step-up or step-down operation. Due to its unique adaptive fractional switching topology, the device achieves high efficiency over a wider input/output voltage range than any of its predecessors. The FAN5602 utilizes resistance modulated loop control, which produces lower switching noise than other topologies. Depending upon actual load conditions, the device automatically switches between constant frequency and pulse skipping (PFM) modes of operation in order to extend battery life. The FAN5602 produces a fixed regulated output within the range of 2.7V to 5.5V from any type of voltage source. High efficiency is achieved under any input/output voltage conditions because an internal logic circuitry automatically reconfigures the system to the be...