Alternative Parts
Overview
Features and Benefits
- 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)
Product 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
Product Categories
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Documentation & Resources
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R012 Reliability Data3/23/2018
Tools & Simulations
LTspice
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.

Models for the following parts are available in LTspice:
Product Recommendations
LT1268 Companion Parts
Design Resources
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 Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
---|---|---|---|---|
LT1268BCQ#PBF | Material Declaration | Reliability Data | 5-Lead DD Pak | |
LT1268BCQ#TRPBF | Material Declaration | Reliability Data | 5-Lead DD Pak | |
LT1268BCT#PBF | Material Declaration | Reliability Data | 5-Lead TO-220 | |
LT1268CQ#PBF | Material Declaration | Reliability Data | 5-Lead DD Pak | |
LT1268CQ#TRPBF | Material Declaration | Reliability Data | 5-Lead DD Pak | |
LT1268CT#PBF | Material Declaration | Reliability Data | 5-Lead TO-220 | |
Wafer Fabrication Data | R012 Reliability Data |
PCN-PDN Information
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Support & Discussions
Sample & Buy
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Buy Now Pricing
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List Pricing
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Lead Times
Please see the latest communication from our CCO regarding lead times.
Sampling
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