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Related Links:

Datasheets:
SI-8033JD: Step-Down to 3.3 V, 1.5 A, DC/DC Converter (PDF)

Selection Guides:
Sanken Switching Regulators

when this product is updated

Press Releases:
Allegro Expands Product Line with Sanken Offerings

SI-8033JD
Step-Down to 3.3 V, 1.5 A, DC/DC Converter

Features

• 5.3 V to 40 V Input Range
• 1.5 A Output Current at 3.3 V
• 2% Output Voltage Tolerance
• Foldback Current Limiting
• Constant 125 kHz Switching Frequency
• 200 µA Maximum Standby Current
• Soft Start Prevents Supply Voltage Dip
• Remote Voltage Sensing
• Exposed Pad for Superior Heat Dissipation
• Thermal Protection

Applications

• TVs, VCRs, Electronic Games
• Embedded Core, Memory, or Logic Supplies
• Printers and Other Office Equipment
• Industrial Machinery
• Telecommunications Equipment

Description

Designed to meet high-current requirements at high efficiency in industrial and consumer applications; embedded core, memory, or logic supplies; TVs, VCRs, and office or telecommunications equipment, the SI-8033JD dc/dc step-down (buck) converter offers a constant 125 kHz switching frequency essential for low EMI noise. The npn switch is included on the die along with the oscillator, control, and logic circuitry requiring only four external components for a regulated 3.3 V output at up to 1.5 A.

A wide input voltage range and integrated thermal and overcurrent protection enhance overall system reliability. Reference accuracy and excellent temperature characteristics are provided. An output-enable input gives the designer complete control over power up, standby, or power down.

This device is supplied in a 5-lead surface-mount plastic package (TO-263) with ground tab to provide a low-resistance path for maximum heat dissipation. A similar device in a flange-mounted (TO-220-style) high-power package is the SI-8033JF.

Functional Block Diagram

Complete Part Numbers

Part Number	Package Type	RoHS Compliant	Part Composition/ RoHS Data	Temperature	Comments	Distributor Stock	Samples
SI-8033JD	5-lead TO-263	Yes	--	-40 °C to  125 °C	new		Contact Local Sales Representative

Allegro's products are not to be used in life support devices or systems, if a failure of an Allegro product can reasonably be expected to cause the failure of that life support device or system, or to affect the safety or effectiveness of that device or system.