LM2576 datasheet(29/46 Pages) TI

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CONTINUOUS/

DISCONTINUOUS

MODE OPERATION

Relates to the inductor current. In the continuous mode, the inductor current is always

flowing and never drops to zero, vs. the discontinuous mode, where the inductor

current drops to zero for a period of time in the normal switching cycle.

INDUCTOR

SATURATION

The condition which exists when an inductor cannot hold any more magnetic flux.

When an inductor saturates, the inductor appears less inductive and the resistive

component dominates. Inductor current is then limited only by the DC resistance of the

wire and the available source current.

OPERATING VOLT

MICROSECOND

CONSTANT (E•Top)

The product (in VoIt•μs) of the voltage applied to the inductor and the time the voltage

is applied. This E•Top constant is a measure of the energy handling capability of an

inductor and is dependent upon the type of core, the core area, the number of turns,

and the duty cycle.

9.1.2 Development Support

9.1.2.1 Custom Design with WEBENCH® Tools

Click here to create a custom design using the WEBENCH Power Designer.

1. Start by entering your VIN, VOUT and IOUT requirements.

2. Optimize your design for key parameters like efficiency, footprint and cost using the optimizer dial and

compare this design with other possible solutions from Texas Instruments.

3. WEBENCH Power Designer provides you with a customized schematic along with a list of materials with real

time pricing and component availability.

4. In most cases, you will also be able to:

• Run electrical simulations to see important waveforms and circuit performance,

• Run thermal simulations to understand the thermal performance of your board,

• Export your customized schematic and layout into popular CAD formats,

• Print PDF reports for the design, and share your design with colleagues.

9.2 Documentation Support

9.2.1 Related Documentation

For related documentation, see the following:

AN-1229 SIMPLE SWITCHER® PCB Layout Guidelines application report

9.3 Support Resources

TI E2E™ support forums are an engineer's go-to source for fast, verified answers and design help — straight

from the experts. Search existing answers or ask your own question to get the quick design help you need.

Linked content is provided "AS IS" by the respective contributors. They do not constitute TI specifications and do

not necessarily reflect TI's views; see TI's Terms of Use.

9.4 Receiving Notification of Documentation Updates

To receive notification of documentation updates, navigate to the device product folder on ti.com. Click on

Subscribe to updates to register and receive a weekly digest of any product information that has changed. For

change details, review the revision history included in any revised document.

9.5 Trademarks

TI E2E™ is a trademark of Texas Instruments.

SIMPLE SWITCHER® and WEBENCH® are registered trademarks of Texas Instruments.

All trademarks are the property of their respective owners.

www.ti.com

LM2576, LM2576HV

SNVS107G – JUNE 1999 – REVISED MARCH 2023

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LM2576 Datasheet(PDF) 29 Page - Texas Instruments

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