NCP3125

NCP3125 4 A Synchronous PWM Switching Converter The NCP3125 is a flexible synchronous PWM Switching Buck Regulator. The NCP3125 is capable of producing output voltages as low as 0.8 V. The NCP3125 also incorporates voltage mode control. To reduce the number of external components, a number of features are internally set including switching frequency. The NCP3125 is currently available in an SOIC−8 package. Features 4.5 V to 13.2 V Operating Input Voltage Range 60 mW High−Side, 36 mW Low−Side Switches Output Voltage Adjustable to 0.8 V 4 A Continuous Output Current Fixed 350 kHz PWM Operation 1.0% Initial Output Accuracy 75% Max Duty Ratio Over−Load Protection Programmable Current Limit This is a Pb−Free Device Typical Application Set Top Boxes DVD Drives and HDD LCD Monitors and TVs Cable Modems Telecom / Networking / Datacom Equipment http://onsemi.com 8 1 SOIC−8 NB D SUFFIX CASE 751 MARKING DIAGRAM 8 3125 ALYWXG G 1 3125 A L Y W G = Specific Device Code = Assembly Location = Wafer Lot = Year/ = Work Week = Pb−Free Package PIN CONNECTIONS PGND FB COMP AGND 1 (Top View) VSW ISET VIN BST ORDERING INFORMATION See detailed ordering and shipping information in the package dimensions section on page 21 of this data sheet. 4.5 V − 13.2 V VIN BST VSW PGND NCP3125 ISET FB1 COMP AGND Figure 1. Typical Application Circuit 3.3 V EFFICIENCY (%) 100 95 5 V 90 85 80 75 70 65 0 0.5 1 1.5 2 2.5 3 3.5 4 OUTPUT CURRENT (A) Figure 2. Efficie...