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Related Links:

Datasheets:
SI-8120JF: Step-Down to 12.0 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-8120JF
Step-Down to 12.0 V, 1.5 A, DC/DC Buck Converter

Features

• 14 V to 40 V Input Range
• 1.5 A Output Current at 12 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
• 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-8120JF 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 12.0 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 fully molded TO-220-style 5-lead flange-mounted, high power, isolated plastic package. A similar device in a lower-power surface-mount plastic package is the SI-8120JD.

Functional Block Diagram

Complete Part Numbers

Part Number	Package Type	RoHS Compliant	Part Composition/ RoHS Data	Temperature	Comments	Samples	Distributor Stock
SI-8120JF	5-lead TO-220	Yes	--	-40 °C to  125 °C	new	Due to warehouse relocation, samples will be unavailable until July 21, 2008. Contact your sales rep or purchase from distributor.

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.