AF2039
AF2039 is manufactured by AFSEMI.
Features l Min1.6V Startup @1mA Load l 600mV Feedback Voltage l 550KHz Internal Oscillator l Soft Startup: 10mS Typical l Peak Current Programmable by Bottom Sensing Resistor l 300µA Typical Iq l Internal PWM/PFM Auto Mode Switching l Up to 90% Efficiency l External Enable l Power OFF Current<1µA l Over Voltage Protection l 140℃ Thermal Shut Down, 20℃ Hysteresis
Applications l USB Charger
General Description
The AF2039 using the external NMOSFET. It is a high efficiency boost converter with 600mV feedback voltage. A switching frequency of 550KHz minimizes solution footprint by allowing the use of tiny low profile inductors and ceramic capacitors. The current mode PWM/PFM design is...
