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ST L5965 User Manual
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ST L5965 User Manual

ST L5965 User Manual

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UM2564
User manual
L5965 evaluation board
Introduction
L5965 is a multichannel voltage regulator specifically designed to support applications that need to fulfill functional safety
requirements as defined by Automotive Safety Integrity Level (ASIL).
It is available in VQFPN-48 package.
This document describes how to use the L5965 application board in order to check device's performance.
Please refer to the datasheet.
Figure 1.
L5965 evaluation board
UM2564 - Rev 1 - June 2019
www.st.com
For further information contact your local STMicroelectronics sales office.

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Summary of Contents for ST L5965

  • Page 1 User manual L5965 evaluation board Introduction L5965 is a multichannel voltage regulator specifically designed to support applications that need to fulfill functional safety requirements as defined by Automotive Safety Integrity Level (ASIL). It is available in VQFPN-48 package. This document describes how to use the L5965 application board in order to check device's performance.

  • Page 2: Board Description

    Board description The demo board is an evaluation tool for L5965. L5965 embeds 1 controller and 1 buck that can both be supplied by the car battery and used as pre-regulators, 2 buck post-regulators, 1 boost, 1 linear regulator and 1 precise voltage reference.

  • Page 3: Board Operation

    UM2564 Board operation Board operation The demonstration board is already set to allow the evaluation of the PMIC features. For a basic use, no preliminary operation is necessary. Just connect a compatible voltage to the connector J2 (VBAT1) and check the output signals on proper connectors.

  • Page 4: Programming Option

    UM2564 Programming option Programming option The L5965 mounted on this demonstration board is programmed as follows (see product datasheet, chapter 6.8). Figure 3. OTP programming Buck2 is the main regulator and provides 3.3 V at 3 A and 0.4 MHz. This is the pre-regulator that supplies the others.

  • Page 5: Spi Connector

    UM2564 SPI connector SPI connector SPI signals are available on the J12 connector. The SPI bus can be also used to monitor the PMIC diagnostics. Figure 4. Demo board SPI connector UM2564 - Rev 1 page 5/10...

  • Page 6: Board Schematic

    100nF PGND4 PGND4 22uF 40V VBU CK2 LD O 6.8uH VBU CK5 XAL1010-682 LD O 1.3V J2 1 J2 2 VBUCK5 5V ST PS 5 L60-Y VBO OST_S 3.3uF 3.3uF 100nF 3.3uF 1.25K PGND5 PGND5 GNDANA PGND5 GNDANA PGND1 PGND2...

  • Page 7: Information On Board Use

    Demonstrations • Evaluation purposes only It is not considered by ST Microelectronics (STM) to be a finished end-product fit for general consumer use. The people who handle the product(s) must have electronics training and must observe good engineering standard practices.

  • Page 8: Revision History

    UM2564 Revision history Table 1. Document revision history Date Version Changes 17-Jun-2019 Initial release. UM2564 - Rev 1 page 8/10...

  • Page 9: Table Of Contents

    UM2564 Contents Contents Board description ..............2 Board operation .
  • Page 10 ST’s terms and conditions of sale in place at the time of order acknowledgement. Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or the design of Purchasers’...