NCP3133A

NCP3133A Integrated Synchronous Buck Converter 3A NCP3133A is a fully integrated synchronous buck converter for 3.3 V and 5 V step−down applications. It can provide up to 3 A load current. NCP3133A supports high efficiency, fast transient response and provides power good indicator. The control scheme includes two operation modes: FCCM and automatic CCM/DCM. In automatic CCM/DCM mode, the controller can smoothly switch between CCM and DCM, where converter runs at reduced switching frequency with much higher efficiency. NCP3133A is available in 3 mm x 3 mm QFN−16 pin package. Features High Efficiency in both CCM and DCM High Operation Frequency at 1.1 MHz Support MLCC Output Capacitor Small Footprint, 3 mm x 3 mm, 16−pin QFN Package Up to 3 A Continuous Output Current 2.9 V to 5.5 V Wide Conversion Voltage Range Output Voltage Range from 0.6 V to 0.84 X Vin Internal 400 ms Soft−Start Automatic Power−Saving Mode Voltage Mode Control Support Pre-bias Start−up Functionality Output Discharge Operation Over−Temperature Protection Built−in Over−Voltage, Under−Voltage and Over-Current Protection Power Good Indicator This is a Pb−Free Device Applications 5 V Step Down Rail 3.3 V Step Down Rail www.onsemi.com 1 QFN16 3 x 3, 0.5P CASE 485DA SUGGESTED PIN ARRANGEMENT PGND PGND VIN VIN 16 15 14 13 EN 1 12 VDD NC 2 PGD 3 NCP3133A 11 AGND 10 FB VBST 4 9 COMP 5678 SW SW SW PS MARKING DIAGRAM 3133A ALYWG G 3133A A L Y W G = Specific Device C...