AX5202

AX5202 Step-up PWM DC/DC Converter  GENERAL DESCRIPTION The AX5202 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 AX5202 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 16V - Output voltage：3.3V to 23V - Duty ratio：0% to 85% PWM control - Oscillation frequency：500KHz. Enable and Thermal Shutdown function. Internal Current limit. VÛmw`RyÑb€ MOSFET Built-in N-channel SOP-8L with Exposed pad Pb-Free package.  BLOCK DIAGRAM w.goftech.com VCC Phase Compensation + + Buffer Driver FB Regulator SW Vref=1.0V PWM Controller EN V EN 8uA Thermal Shutdown SGND Oscillator 0.06V PGND SS 1/10 Axelite Confidential Materials, do not copy or distribute without written consent. Rev.1.2 Jan.25, 2011 AX5202  PIN ASSIGNMET The package of AX5202 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 EN VCC FB SS D...