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12 Device and Documentation Support

12.1 Device Support

12.1.1 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.

12.1.2 Development Support

With an input operating voltage as low as 3.5 V and up to 100 V as specified in Table 12-1, the LM(2)514x family

of synchronous buck controllers from TI provides flexibility, 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 12-1. Synchronous Buck DC/DC Controller Family

DC/DC

CONTROLLER

SINGLE or

DUAL

VIN RANGE

CONTROL METHOD

GATE DRIVE

VOLTAGE

SYNC OUTPUT

EMI MITIGATION

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

AEF, DRSS

LM25141

Single

3.8 V to 42 V

Peak current mode

5 V

N/A

SR control, TRSS

LM5141

Single

3.8 V to 42 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

LM25145

Single

6 V to 42 V

Voltage mode

7.5 V

180° phase shift

N/A

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

For development support see the following:

• LM5146 Quickstart Calculator

• LM5146 simulation models

• For TI's reference design library, visit TI Designs

• For TI's WEBENCH Design Environment, visit the WEBENCH® Design Center

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

• TI Reference Designs:

– 57W output synchronous buck converter for telecom reference design

– 10-A automotive pre-regulator reference design

– 10-A automotive pre-regulator reference design with extended input voltage range for trucks

– 20-A automotive pre-regulator reference design

– 20-A automotive pre-regulator reference design with extended input voltage range for trucks

• 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

12.1.2.1 Custom Design With WEBENCH® Tools

to create a custom design using the LM5146 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

LM5146

SNVSBV0A – JUNE 2021 – REVISED JUNE 2021

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