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Related Links:

Datasheets:
A8697: Wide Input Voltage 4.0 A Step Down Regulator (PDF)

Selection Guides:
Power Management ICs,

Power Management ICs: Switching Regulators

when this product is updated

Technical Publications:
A8698 and A8697: 25 V Input, 3 or 4 Amp Output Step-Down Regulators (PDF)

Press Releases:
A8697 and A8698: Allegro Announces Two New 3 To 4 Amp Step-Down Regulators

Product Evaluation Kits:
A8697 Product Evaluation Kit

A8697
Wide Input Voltage 4.0 A Step Down Regulator

Features

• 8 to 25 V input range
• Integrated DMOS switch
• Adjustable fixed off-time
• Adjustable output

Description

The A8697 is a constant off-time current mode step-down regulator with a wide input voltage range. Regulation voltage is set by external resistors, to output voltages as low as 0.8 V.

The A8697 includes an integrated power DMOS switch to reduce the total solution footprint. It also features internal compensation, allowing users to design stable regulators with minimal design efforts.

The off-time can be set with an external resistor, allowing flexibility in inductor selection. Additionally, the A8697 has a logic level enable pin which can shut the device down and put it into a low quiescent current mode for power sensitive applications.

The A8697 is supplied in a low-profile 8-lead SOIC with exposed pad (package LJ). Applications include:

• Applications with 8 to 25 V input
• Consumer electronics, networking equipment
• 12 V lighter-powered applications (portable DVD, etc.)
• Point of Sale (POS) applications

Gerber Files

• A8697 Gerber File (ZIP)

Gerber files are for reference only. Users should optimize the PCB layout and components for their specific application. Evaluation Board for A8698 is available upon request. Please contact your local representative.

Functional Block Diagram

Complete Part Numbers

Part Number	Package Type	RoHS Compliant	Part Composition/ RoHS Data	Temperature	Comments	Samples	Distributor Stock
A8697ELJ-T	8-lead SOT	Yes	view data	-40 °C to  85 °C	new	Due to warehouse relocation, samples will be unavailable until July 21, 2008. Contact your sales rep or purchase from distributor.
A8697ELJTR-T	8-lead SOT	Yes	view data	-40 °C to  85 °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.