LT1268

PRODUCTION

7.5A, 150kHz Switching Regulators

Part Models: 6
1ku List Price: Starting From $9.23

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Overview

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)

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

Part Models: 6
1ku List Price: Starting From $9.23

Documentation

Data Sheet 1

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

Reliability Data 1

R012 Reliability Data 03/23/2018

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	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1268BCQ#TRPBF	5-Lead DD Pak	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1268BCT#PBF	5-Lead TO-220	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1268CQ#PBF	5-Lead DD Pak	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1268CQ#TRPBF	5-Lead DD Pak	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1268CT#PBF	5-Lead TO-220	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

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
		PCN22_0175_Form Material_Report Delta Qualification Matrix
LT1268BCQ#PBF	PRODUCTION
LT1268BCQ#TRPBF	PRODUCTION
LT1268BCT#PBF	PRODUCTION
LT1268CQ#PBF	PRODUCTION
LT1268CQ#TRPBF	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Hardware Ecosystem

Parts	Product Life Cycle	Description
Oscillators 2
LTC6908		Resistor Set SOT-23 Oscillator with Spread Spectrum Modulation
LTC6909	PRODUCTION	1 to 8 Output, Multiphase Silicon Oscillator with Spread Spectrum Modulation

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

Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

LT1268
LT1268B

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.

Latest Discussions

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