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LM60440, LM60430

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SNVSBN5A – FEBRUARY 2020 – REVISED JUNE 2020

Product Folder Links: LM60440 LM60430

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Copyright © 2020, Texas Instruments Incorporated

Typical Application (continued)

9.2.1 Design Requirements

Table 1 provides the parameters for our detailed design procedure example:

Table 1. Detailed Design Parameters

DESIGN PARAMETER

EXAMPLE VALUE

Input voltage

12 V (6 V to 36 V)

Output voltage

5 V

Maximum output current

0 A to 4 A

Switching frequency

400 kHz

Table 2. LM60440 Typical External Component Values

(kHz)

L (µH)

CAPACITANCE)

400

3.3

4.7

3 × 47 µF

100 k

43.2 k

4.7 µF + 2 × 220 nF

100 nF

1 µF

open

1000

3.3

2.2

2 × 22 µF

100 k

43.2 k

4.7 µF + 2 × 220 nF

100 nF

1 µF

open

400

5

6.8

4 × 47 µF + 22 µF

100 k

24.9 k

4.7 µF + 2 × 220 nF

100 nF

1 µF

open

1000

5

3.3

2 × 22 µF

100 k

24.9 k

4.7 µF + 2 × 220 nF

100 nF

1 µF

open

400

12

15

4 × 22 µF

100 k

9.09 k

4.7 µF + 2 × 220 nF

100 nF

1 µF

open

1000

12

5.2

4 × 10 µF

100 k

9.09 k

4.7 µF + 2 × 220 nF

100 nF

1 µF

open

Table 3. LM60430 Typical External Component Values

(kHz)

L (µH)

CAPACITANCE)

400

3.3

5.6

4 × 22 µF

100 k

43.2 k

4.7 µF + 2 × 220 nF

100 nF

1 µF

open

1000

3.3

3.3

3 × 22 µF

100 k

43.2 k

4.7 µF + 2 × 220 nF

100 nF

1 µF

open

400

5

8.2

4 × 22 µF

100 k

24.9 k

4.7 µF + 2 × 220 nF

100 nF

1 µF

open

1000

5

4.7

3 × 22 µF

100 k

24.9 k

4.7 µF + 2 × 220 nF

100 nF

1 µF

open

400

12

15

4 × 22 µF

100 k

9.09 k

4.7 µF + 2 × 220 nF

100 nF

1 µF

open

1000

12

6.8

3 × 22 µF

100 k

9.09 k

4.7 µF + 2 × 220 nF

100 nF

1 µF

open

9.2.2 Detailed Design Procedure

The following design procedure applies to Figure 9 and Table 1.

9.2.2.1 Custom Design With WEBENCH® Tools

Click here to create a custom design using the LM60440 device with the WEBENCH® Power Designer.

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

3. Compare the generated design with other possible solutions from Texas Instruments.

The WEBENCH Power Designer provides a customized schematic along with a list of materials with real-time

pricing and component availability.

In most cases, these actions are available:

•

Run electrical simulations to see important waveforms and circuit performance

•

Run thermal simulations to understand board thermal performance

•

Export customized schematic and layout into popular CAD formats

•

Print PDF reports for the design, and share the design with colleagues

Get more information about WEBENCH tools at www.ti.com/WEBENCH.