AF2039 Datasheet (AFSEMI)

AF2039, NMOSFET

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

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