AX5204

AX5204 Step-up PWM DC/DC Converter  GENERAL DESCRIPTION The AX5204 is high efficient step-up DC/DC converter. Large output current is possible having a built in internal N channel MOSFET, and using an external coil and diode. The AX5204 can be operated at switching frequencies of 500 kHz allowing for easy filtering and low noise, the size of the external components can be reduced. Output voltage is programmable with 1.0V of standard voltage supply internal, and using externally connected components, output voltage (FB) can be set up at will. The soft-start time can be programmed by outside capacitor; the function prevents overshoot at startup. Build inside Current limit, Thermal Shutdown and enable functions.  FEATURES - Input voltage：3V to 20V - Output voltage：3.3V to 32V - Duty ratio：0% to 85% PWM control - Oscillation frequency：500KHz. Enable and Thermal Shutdown function. VÛmw`RyÑb€ Internal Current limit. Built-in N-channel MOSFET SOP-8L with Exposed pad Pb-Free package. w.goftech.com  BLOCK DIAGRAM Vcc Phase Compensation + + Vref=1.0V Buffer Driver FB Regulator SW PWM Controller EN VEN 8uA Thermal Shutdown Oscillator 0.06V SGND PGND SS 1/10 Axelite Confidential Materials, do not copy or distribute without written consent. Rev.1.5 Jan.25, 2011 AX5204  PIN ASSIGNMET The package of AX5204 is SOP-8L-EP; the pin assignment is given by: Name ( Top View ) EN VCC FB SS 1 2 3 4 SOP-8L-EP (EP is connect to SW) Exposed Pad 8 7 6 5 SGND PGND SW SW Description SG...