MC33470 Series

Synchronous Rectification, DC-DC Converter, Programmable Integrated Controller

Catalog

Synchronous Rectification, DC-DC Converter, Programmable Integrated Controller

Part	Package / Case	Package / Case [y]	Package / Case [y]	Operating Temperature [Max]	Operating Temperature [Min]	Mounting Type	Number of Outputs	Applications	Voltage - Output [Min]	Voltage - Output [Max]	Supplier Device Package	Voltage - Input [Max]	Voltage - Input [Min]
ON Semiconductor MC33470DWR2G	20-SOIC	0.295 in	7.5 mm	70 °C	0 °C	Surface Mount	1	Controller Intel Pentium® II	1.8 V	3.5 V	20-SOIC	5.5 V	4.5 V
ON Semiconductor MC33470DW	20-SOIC	0.295 in	7.5 mm	70 °C	0 °C	Surface Mount	1	Controller Intel Pentium® II	1.8 V	3.5 V	20-SOIC	5.5 V	4.5 V

Catalog

Synchronous Rectification, DC-DC Converter, Programmable Integrated Controller

Key Features

• 5-Bit Digital-to-Analog Converter Allows Digital Control of Output Voltage

• High Speed Response to Transient Load Conditions

• Output Enable Pin Provides On/Off Control

• Programmable Soft Start Control

• High Current Output Drives for Synchronous Rectification

• Internally Trimmed Reference with Low Temperature Coefficient

• Programmable Overcurrent Protection

• Overvoltage Fault Indication

• Functionally Similar to the LTC1553

• Pb-Free Packages are Available

Description

The MC33470 is a digitally programmable switching voltage regulator, specifically designed for Microprocessor supply, Voltage Regulator Module and general purpose applications, to provide a high power regulated output voltage using a minimum of external parts. A 5–bit digital–to–analog converter defines the dc output voltage.This product has three additional features. The first is a pair of high speed comparators which monitor the output voltage and expedite the circuit response to load current changes. The second feature is a soft start circuit which establishes a controlled response when input power is applied and when recovering from external circuit fault conditions. The third feature is two output drivers which provide synchronousrectification for optimum efficiency.This product is ideally suited for computer, consumer, and industrial equipment where accuracy, efficiency and optimum regulation performance is desirable.