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AF2039

AFSEMI
Part Number AF2039
Manufacturer AFSEMI
Description NMOSFET
Published Dec 18, 2018
Detailed Description AF2039 Features l Min1.6V Startup @1mA Load l 600mV Feedback Voltage l 550KHz Internal Oscillator l Soft Startup: 10mS T...
Datasheet PDF File AF2039 PDF File

AF2039
AF2039

Overview
AF2039 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 internally compensated, and the device has a 1.
6V startup voltage with 1mA load.
It needs few external components, only inductance, resistance and capacitance can meet the driving capacity.
Block Diagram AF-V1.
0 www.
afsemi.
com 1/5 Analog Future Pin Assignment Pin 1 2 3 4 5 Symbol FB VDD CE ...


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