L5965 Datasheet Power management for automotive vision and radar systems Features AEC-Q100 qualified Pre SMPS BUCK1 regulator controller, adjustable via OTP to 0.8 V, 1.0 V, 1.1 V, 1.2 V, 1.8 V, 3.3 V, 3.8 V, 5.0 V 0.4 MHz VFQFPN-48 (7x7 mm) Pre SMPS BUCK2 regulator, adjustable via OTP to 1.0 V, 1.1 V, 1.2 V, 1.35 V, 1.5 V, 3.3 V, 3.6 V, 5.0 V 1.35/2.6 A min peak current limit, 0.4/2.4 MHz GAPGPS03203 Post SMPS BUCK3 regulator, adjustable via OTP to 1.0 V, 1.2 V, 1.35 V, 1.8 V, 2.0 V, 2.3 V, 2.5 V, 3.3 V 1.4 A min peak current limit, 2.4 MHz Post SMPS BUCK4 regulator, adjustable via OTP to 1.1 V, 1.12 V, 1.2 V, 1.25 V, 1.3 V, 1.35 V, 1.8 V, 3.3 V 1 A min peak current limit, 2.4 MHz Post SMPS BOOST regulator, adjustable via OTP to 5.0 V 0.3 A max load current, 7.0 V 0.2 A max load current, 2.4 MHz Post Linear regulator LDO, adjustable via OTP to 1.2 V, 1.25 V, 1.3 V, 1.8 V, 2.5 V, 2.8 V, 3.3 V, 5.0 V 300/600 mA max load current Precise Voltage reference, adjustable via OTP to 1.8 V, 2.5 V, 3.3 V, 4.1 V 20 mA max load current SPI interface with CRC Programmable slew rate/soft start Voltage supervisors Spread frequency spectrum Reset and reset activation list Adjustable window watchdog supervisors Power up phase programmable via OTP Product status link Short circuit protected outputs and Fault detection pin to Microcontroller L5965 Low external components number Thermal shutdown junction temperature 175 C Product summary Order code Package Packing Description L5965SQ-V0Y Tray L5965 is a multiple voltage regulator composed by two battery compatible BUCK pre- VFQFPN-48 Tape and L5965SQ-V0T regulators (one of which is a controller), two BUCK post regulators with internal reel compensation, one BOOST, one LDO and a precise voltage reference regulator. All the regulators, except the BUCK1 pre-regulator, have internal power switches. OTP (One Time Programmable) cells are used for the main device parameters programming (output voltages and currents, switching frequencies) and to configure power up sequence. An SPI interface can be used to enable or disable the single voltage regulators, for diagnostic information and to program internal blocks parameters (monitor and Power Good thresholds, slew rate, etc.). The device offers a set of features to support applications that need to fulfill functional safety requirements as defined by Automotive Safety Integrity Level (ASIL) A-B-C-D. DS12567 - Rev 2 - May 2019 www.st.com For further information contact your local STMicroelectronics sales office.L5965 Overview 1 Overview L5965 is a multichannel voltage regulator able to offer flexibility and ease to use, together with a set of features that make it compliant to car passenger applications that require a certain level of safety. The product includes input and output monitors, independent band-gaps, ground loss monitors, internal compensation networks, that also help reduce the BOM, digital and analog BIST, fault pin. In this product, there are 7 different regulators. A first battery-compatible regulator, a controller that can supply several current flow thanks to the use of external MOSs. A second regulator with integrated MOS that can be used as a pre-regulator for currents up to about 2.6 A. Two bucks, post regulators, one boost that can be used to supply, for example, a CAN bus, one LDO and a 1% accurate reference voltage for the microcontroller. All output voltages can be selected via memory cells (OTP) that can be programmed before using the PMIC. This guarantees precision and safety, since output voltages are not susceptible to variations due to the external environment. It also contributes to reducing the number of external components. Through the OTP it is also possible to decide the switching frequency of some regulators, the current limitation, select the main buck and the system power-on sequence. Programming can also be done at customers production line. There is also an SPI bus, used to program the PMIC and to communicate with the microcontroller. Through this bus it is possible to set overvoltage and undervoltage thresholds, enable the spread spectrum, select the soft start time and many other things. The SPI is also used to communicate the status of the bucks in case of fault, over- temperature or other events. The maximum free run switching frequency of the bucks is 2.4 MHz, modifiable through external synchronization signals. The PMIC can manage watchdog and reset signals. 1.1 Simplified block diagram Figure 1. Simplified block diagram VBAT INDEPENDENT SUPPLIES Pre-BUCK1 Buck pre/post regulator compatible to battery V Voltage WKUP controller 5-3.8-3.3-1.8-1.2-1.1-1.0-0.8 V 0.4 MHz references Pre-BUCK2 Buck pre/post regulator compatible to battery V Safety FAULT management 5.0-3.6-3.3-1.5-1.35-1.2-1.1-1.0 V 1.35-2.6 A 0.4-2.4 MHz BUCK3 Buck post regulator compatible to 5.5 V max Watchdog & RESETB Internal 3.3-2.5-2.3-2.0-1.8-1.35-1.2-1.0 V 1.4 A 2.4 MHz Reset compensation BUCK4 Buck post regulator compatible to 5.5 V max SPI SPI Internal 3.3-1.8-1.35-1.3-1.25-1.2-1.12-1.1 V 1 A 2.4 MHz compensation OTP BOOST Boost post regulator compatible to 5.5 V max 7 V 0.2 A, 5 V 0.3 A 2.4 MHz Supervisors Diagnostics LDO Linear post regulator compatible to 5.5 V max 5-3.3-2.8-2.5-1.8-1.3-1.25-1.2 V 300-600 mA Supervisors SYNC IN Oscillator SYNC OUT VREF Internally connected to the battery 4.1 - 3.3 - 2.5 - 1.8 V 20 mA Supervisors Note: Buck min peak currents . GAPG1005181515PS DS12567 - Rev 2 page 2/85