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
For further information contact your local STMicroelectronics sales office.
www.st.com
1 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. For further details on the device please refer to the datasheet.
Useful connectors available on the board:
• J1 = VBUCK1 (Buck1 output connector)
• J2 = VBAT1 (Battery input power supply, supplying Buck1 and Buck2)
• J3 = SYNCIN and ground pin connections
• J4 = SYNCOUT and ground pin connections
• J5 = Service/Voltage signals/VREF output connector
• J6 = EXTSUP (Alternative IC power supply connector)
• J11 = VBUCK2 (Buck2 output connector)
• J12 = SPI bus connector
• J14 = VBUCK3 (Buck3 output connector)
• J17 = VBUCK4 (Buck4 output connector)
• J18 = VSLDO LDO (Ldo input power supply connector)
• J21 = LDO (Ldo output connector)
• J22 = VBOOST (Boost output connector)
UM2564
Board description
Figure 2. Board top view design
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2 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.
Buck2, Buck3, Buck4, Boost and Vref are switched on automatically.
Buck1 and Ldo have been programmed in order to be enabled by SPI (for instruction, please read the product
datasheet, chapter 5). The Ldo input (J18) has to be connected by a wire with the output of a Buck regulator
(Buck2, for instance, on J11).
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Board operation
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