HX4002

Low Noise Regulated Charge Pump in SOT23-6 HX4002 Features Fixed 3.3V or 5V Outputs VIN Range: 1.8V to 4.5V(HX4002-3.3) 2.7V to 5.5V(HX4002-5) Output Current: Up to 200mA (HX4002-5) Up to 50mA (HX4002-3.3) Constant Frequency Operation at All Loads Low Noise Constant Frequency (1.2MHz) Operation Shutdown Disconnects Load from Input Shutdown Current <1µA Short-Circuit/Thermal Protection Available in Low Profile 6-Lead sot23 Package Application 2 AA Cell to 3.3V Li-Ion to 5V USB On-The-Go Devices White LED Drivers Handheld Devices Description The HX4002 is a low noise, constant frequency (1.2MHz) switched capacitor voltage doublers. The HX3200-3.3can produce a regulated output voltage of 3.3Vfrom a minimum input voltage of 1.8V (2 alkaline cells)whereas the HX3200-5 can produce 5V from a minimum of 2.7V (Li-Ion battery) input. HX4002 feature constant frequency operation at any load. Built-in soft-start circuitry prevents excessive inrush current during start-up. Thermal shutdown and cu...