LT1268

PRODUCTION

LT1268

7.5A, 150kHz Switching Regulators

PRODUCTION

Boost Regulator with 5.3V ±1% Output slide

Efficiency of 5.3V Boost Converter slide

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Part Models 6

1ku List Price Starting From $9.23

Features

Wide Input Voltage Range: 3.5V to 30V
Low Quiescent Current: 7mA
Internal 7.5A Switch
Very Few External Parts Required
Self-Protected Against Overloads
Available in Standard and Surface Mount 5-Pin Packages
Can Be Externally Synchronized (See LT1072 Data Sheet)

Additional Details

The LT1268B and LT1268 are monolithic high power switching regulators. Identical to the popular LT1070, except for switching frequency (150kHz) and higher switch current, they can be operated in all standard switching configurations including buck, boost, flyback, and inverting. A high current, high efficiency switch is included on the die along with all oscillator, control, and protection circuitry. Integration of all functions allows the LT1268 to be built in standard 5-pin power packages. This makes it extremely easy to use and provides “bust proof” operations similar to that obtained with 3-pin linear regulators.

The LT1268 operate with supply voltages from 3.5V to 30V and draw only 7mA quiescent current. By utilizing current mode switching techniques, it provides excellent AC and DC load and line regulation.

The LT1268 use an adaptive anti-sat switch drive to allow very wide ranging load currents with no loss in efficiency. An externally activated shutdown mode reduces total supply current to 100µA typical for standby operation.

Applications

High Efficiency Boost Converter
PC Power Supply with Multiple Outputs
Battery Upconverter
Negative-to-Positive Converter

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Ask a Question

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Support

Analog Devices Support Portal is a one-stop shop to answer all your ADI questions.

Visit the ADI Support Page

Ask the ADI community for help.

Ask the EngineerZone Community

FAQs

Sales & Ordering FAQs

Part Models 6

1ku List Price Starting From $9.23

Technical Documents 2

LT1268: 7.5A, 150kHz Switching Regulators Data Sheet 01/28/2010

R012 Reliability Data 03/23/2018

Design Resources 6

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LT1268BCQ#PBF	5-Lead DD Pak	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LT1268BCQ#TRPBF	5-Lead DD Pak	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LT1268BCT#PBF	5-Lead TO-220	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LT1268CQ#PBF	5-Lead DD Pak	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LT1268CQ#TRPBF	5-Lead DD Pak	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LT1268CT#PBF	5-Lead TO-220	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys

LT1268BCQ#PBF
Pin/Package Drawing
5-Lead DD Pak
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LT1268BCQ#TRPBF
Pin/Package Drawing
5-Lead DD Pak
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LT1268BCT#PBF
Pin/Package Drawing
5-Lead TO-220
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LT1268CQ#PBF
Pin/Package Drawing
5-Lead DD Pak
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LT1268CQ#TRPBF
Pin/Package Drawing
5-Lead DD Pak
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LT1268CT#PBF
Pin/Package Drawing
5-Lead TO-220
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

PCN/PDN Information

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Product Lifecycle

PCN

Aug 10, 2022

- 22_0175

Laser Top Mark Conversion for DDPAK & TO220 Packages Assembled in ADPG. Country of Origin Code [MY] To Be Incorporated On Top Mark

LT1268BCQ#PBF

PRODUCTION

LT1268BCQ#TRPBF

PRODUCTION

LT1268BCT#PBF

PRODUCTION

LT1268CQ#PBF

PRODUCTION

LT1268CQ#TRPBF

PRODUCTION

pdf

PCN22_0175_Form

xls

Material_Report

xlsm

Delta Qualification Matrix

Filter by Model

Part Models

Product Lifecycle

PCN

Aug 10, 2022

- 22_0175

Laser Top Mark Conversion for DDPAK & TO220 Packages Assembled in ADPG. Country of Origin Code [MY] To Be Incorporated On Top Mark

LT1268BCQ#PBF

PRODUCTION

LT1268BCQ#TRPBF

PRODUCTION

LT1268BCT#PBF

PRODUCTION

LT1268CQ#PBF

PRODUCTION

LT1268CQ#TRPBF

PRODUCTION

pdf

PCN22_0175_Form

xls

Material_Report

xlsm

Delta Qualification Matrix

Companion Parts 2

Parts	Product Life Cycle	Description
Silicon Oscillators2
LTC6908		Resistor Set SOT-23 Oscillator with Spread Spectrum Modulation
LTC6909	PRODUCTION	1 to 8 Output, Multiphase Silicon Oscillator with Spread Spectrum Modulation

Alternative Parts 2

Parts	Product Life Cycle	Description
LT3579	RECOMMENDED FOR NEW DESIGNS	6A Boost/Inverting DC/DC Converter with Fault Protection
LT3957	PRODUCTION	Boost, Flyback, SEPIC and Inverting Converter with 5A, 40V Switch

LTspice 1

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.