NCP3133A Series

3 A Integrated Synchronous Buck Converter

Catalog

3 A Integrated Synchronous Buck Converter

Part	Voltage - Input (Max) [Max]	Output Type	Package / Case	Number of Outputs	Frequency - Switching	Voltage - Input (Min) [Min]	Mounting Type	Voltage - Output (Min/Fixed)	Synchronous Rectifier	Topology	Operating Temperature [Max]	Operating Temperature [Min]	Supplier Device Package	Voltage - Output (Max) [Max]	Output Configuration	Function	Current - Output
ON Semiconductor NCP3133AMNTXG	5.5 V	Adjustable	16-VFQFN Exposed Pad	1	1.1 MHz	2.9 V	Surface Mount	0.6 V		Buck	85 °C	-40 °C	16-QFN (3x3)	4.62 V	Positive	Step-Down	3 A

Catalog

3 A Integrated Synchronous Buck Converter

Key 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 µs 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

Description

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.