APW1173

APW1173 2A SWITCH STEP DOWN SWITCHING REGULATOR Features 2A Internal Switch Operating Input Voltage from 4.8V to 22V 3.3V ±2% Reference Voltage Output Voltage : APW1173 - adjustable from 1.235V to 20V Low Dropout Operation: 100% Duty Cycle 500KHz Internally Fixed Frequency Voltage Feed-Forward Zero Load Current Operation Internal Current Limit Inhibit for Zero Current Consumption Synchronization Protection Against Feedback Disconnection Thermal Protection External Soft-Start Over-Voltage Protection Lead Free Available (RoHS Compliant) General Description The APW 1173 is a step down monolithic power switching regulator with a switching current limit of 3.8A so it is able to deliver more than 2A DC current to the load depending on the application conditions. The output voltage can be set from 1.235V to 22V.The high current level is also achieved utilize an SO8 package with exposed pad frame. The type of package allows to re-duce the Rth (j-amb) down to approximately 45°C/W. An internal oscillator fixes the switching frequency at 500KHz. Having a minimum input voltage of 4.8V only, it is particularly suitable for 5V bus, available in all computer related applications. Pulse by pulse current limit with the internal frequency modulation offers an effective constant current short. circuit protection. Pin Description OUT SYNC INH COMP 1 2 3 4 8 7 6 5 Applications Consumer: STB, DVD, TV, VCR, Car Radio, LCD monitors Networking: XDSL, Modems...