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13 Device and Documentation Support

13.1 Device Support

13.1.1 Third-Party Products Disclaimer

TI'S PUBLICATION OF INFORMATION REGARDING THIRD-PARTY PRODUCTS OR SERVICES DOES NOT

CONSTITUTE AN ENDORSEMENT REGARDING THE SUITABILITY OF SUCH PRODUCTS OR SERVICES

OR A WARRANTY, REPRESENTATION OR ENDORSEMENT OF SUCH PRODUCTS OR SERVICES, EITHER

ALONE OR IN COMBINATION WITH ANY TI PRODUCT OR SERVICE.

13.1.2 Development Support

With an input operating voltage as low as 3.5 V and up to 100 V as specified in Table 13-1, the LM(2)514x

family of synchronous buck controllers from TI provides scalability and optimized solution size for a range of

applications. These controllers enable DC/DC solutions with high density, low EMI and increased flexibility.

Available EMI mitigation features include dual-random spread spectrum (DRSS) or triangular spread spectrum

(TRSS), split gate driver outputs for slew rate (SR) control, and integrated active EMI filtering (AEF).

Table 13-1. Synchronous Buck DC/DC Controller Family

DC/DC

Controller

Single or

Dual

VIN Range

Control Method

Gate Drive

Voltage

Sync Output

EMI Mitigation

LM25141

Single

3.8 V to 42 V

Peak current mode

5 V

N/A

SR control, TRSS

LM25143

Dual

3.5 V to 42 V

Peak current mode

5 V

90° phase shift

SR control, TRSS

LM25145

Single

6 V to 42 V

Voltage mode

7.5 V

180° phase shift

N/A

LM25148

Single

3.5 V to 42 V

Peak current mode

5 V

180° phase shift

DRSS

LM25149

Single

3.5 V to 42 V

Peak current mode

5 V

180° phase shift

DRSS, AEF

LM5141

Single

3.8 V to 65 V

Peak current mode

5 V

N/A

SR control, TRSS

LM5143

Dual

3.5 V to 65 V

Peak current mode

5 V

90° phase shift

SR control, TRSS

LM5145

Single

6 V to 75 V

Voltage mode

7.5 V

180° phase shift

N/A

LM5146

Single

5.5 V to 100 V

Voltage mode

7.5 V

180° phase shift

N/A

LM5148

Single

3.5 V to 80 V

Peak current mode

5 V

180° phase shift

DRSS

LM5149

Single

3.5 V to 80 V

Peak current mode

5 V

180° phase shift

DRSS, AEF

For development support, see the following:

• LM25143 Quickstart Calculator

• LM25143 Simulation Models

• TI Reference Design Library

• WEBENCH® Design Center

• To design a low-EMI power supply, review TI's comprehensive EMI Training Series

• TI Designs:

– Automotive wide VIN front-end reference design for digital cockpit processing units

• Technical Articles:

– High-density PCB layout of DC/DC converters

– Synchronous buck controller solutions support wide VIN performance and flexibility

– How to use slew rate for EMI control

– How to reduce EMI and shrink power-supply size with an integrated active EMI filter

13.1.2.1 Custom Design With WEBENCH® Tools

Click here to create a custom design using the LM25143 device with the WEBENCH® Power Designer.

1. Start by entering the input voltage (VIN), output voltage (VOUT), and output current (IOUT) requirements.

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.

www.ti.com

LM25143

SNVSC10 – MARCH 2022

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