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9 Device and Documentation Support

9.1 Device Support

9.1.1 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.

9.1.2 Development Support

With an input operating voltage as low as 3.5V and up to 100V as specified in Table 9-1, the LM(2)5k family

of synchronous buck controllers from TI provides flexibility, scalability, and optimized design size for a variety of

applications.

With the LM5137F and LM25137F available to aid in functional safety system design up to SIL 3, the controller

family enables DC/DC designs with high density, low EMI, and increased system reliability.

Table 9-1. Synchronous Buck DC/DC Controller Family

DC/DC

CONTROLLER

SINGLE or

DUAL

VIN RANGE

CONTROL METHOD

GATE DRIVE

VOLTAGE

SYNC OUTPUT

KEY FEATURE

LM5137

Dual

4V to 80V

Peak current mode

90° phase shift

100% duty cycle

LM5137F

Dual

4V to 80V

Peak current mode

90° phase shift

SIL 2 or 3

LM25137

Dual

4V to 42V

Peak current mode

90° phase shift

100% duty cycle

LM25137F

Dual

4V to 42V

Peak current mode

90° phase shift

SIL 2 or 3

LM25139

Single

4V to 42V

Peak current mode

N/A

DRSS

LM5141

Single

3.8V to 65V

Peak current mode

N/A

Split gate drive

LM25141

Single

3.8V to 42V

Peak current mode

N/A

Split gate drive

LM5143

Dual

3.5V to 65V

Peak current mode

90° phase shift

Split gate drive

LM25143

Dual

3.5V to 42V

Peak current mode

90° phase shift

Split gate drive

LM5145

Single

5.5V to 75V

Voltage mode

7.5V

180° phase shift

No shunt

LM5146

Single

5.5V to 100V

Voltage mode

7.5V

180° phase shift

100V input capability

LM5148

Single

3.5V to 80V

Peak current mode

180° phase shift

DRSS

LM25148

Single

3.5V to 42V

Peak current mode

180° phase shift

DRSS

LM5149

Single

3.5V to 80V

Peak current mode

180° phase shift

AEF

LM25149

Single

3.5V to 42V

Peak current mode

180° phase shift

AEF

LM5190

Single

5V to 80V

Peak current mode

7.5V

N/A

CC/CV

LM25190

Single

5V to 42V

Peak current mode

7.5V

N/A

CC/CV

For development support, see the following:

• LM5137 DC/DC controller Quickstart Calculator and PSPICE simulation models

• LM5137F-Q1-EVM12V and LM25137F-Q1-EVM5D3 Altium layout source files

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

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

• TI reference designs:

– 450W four-phase interleaved buck converter reference design

– 20VIN to 60VIN, 600W, automotive two-phase buck regulator with GaN power switches reference design

9.1.2.1 Custom Design With WEBENCH® Tools

Click here to create a custom design using the LM5137 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.

LM5137

SNVSCU3 – OCTOBER 2025

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