TPS653850A-Q1 Series

Functional safety compliant multi-rail power supply for safety MCUs with 350mA I/O rail

Catalog

Functional safety compliant multi-rail power supply for safety MCUs with 350mA I/O rail

Part	Qualification	Voltage - Supply [Max]	Voltage - Supply [Min]	Current - Supply	Package / Case	Package / Case	Package / Case [custom]	Supplier Device Package	Operating Temperature [Min]	Operating Temperature [Max]	Mounting Type	Grade
Texas Instruments O3850AQDCARQ1	AEC-Q100	36 V	7 V	120 mA	48-PowerTFSOP	0.24 in	6.1 mm	48-HTSSOP	-40 °C	125 °C	Surface Mount	Automotive
Texas Instruments O3850QDCARQ1	AEC-Q100											Automotive

Catalog

Functional safety compliant multi-rail power supply for safety MCUs with 350mA I/O rail

Key Features

• AEC-Q100 Qualified with the Following Results:Device Temperature Grade 1: –40°C to +125°C Ambient Operating TemperatureDevice HBM ESD Classification Level 2Device CDM ESD Classification Level C4BFunctional Safety-CompliantDeveloped for Functional Safety ApplicationsDocumentation Availableto Aid ISO 26262 System Design up to ASIL DSystematic Capability and Hardware Integrity up to ASIL DInput Voltage Range7 to 36-V for Initial Battery Power Up4 to 36-V Full Functionality After Initial Battery Power UpMinimum 2.3 V During Operation After Wake-upSupply Rails (With Internal FETs)6-V Synchronous Buck-Boost Preregulator5-V, 285-mA LDO (CAN, Peripherals or ADC REF 1% Accuracy with 20 to 120 mA Load)3.3-V or 5-V, 350-mA LDO (MCU) TPS653850A-Q1.3.3-V 350-mA or 5-V 500 mA LDO (MCU)TPS653852A-Q12 LDOs Protected for Sensor Supply or Peripherals120 mA for Sensor Supply 1 (VSOUT1), 100 mA for Sensor Supply 2 (VSOUT2)Configurable Tracking Mode (Tracking Input Pin), or 3.3-V or 5-V Fixed Output VoltageShort-to-Ground and Battery ProtectionCharge Pump: 6-V Minimum, 11-V Maximum Above Battery VoltageMonitoring and ProtectionIndependent Undervoltage and Overvoltage Monitoring on All Regulator Outputs, Battery Voltage, and Internal SuppliesVoltage Monitoring Circuitry, Including Independent Bandgap Reference, Supplied from Separate Battery Voltage Input PinSelf-Check on All Voltage Monitoring (During Power-Up and After Power-Up Initiated by External MCU)All Supplies Protected with Current Limit and Overtemperature Prewarning and ShutdownMicrocontroller InterfaceOpen and Close Window or Question-Answer Watchdog FunctionMonitor for Functional Safety MCU Fault output (PWM or level), MCU Error-Signal MonitorDIAGNOSTIC state for Performing Device Self-Tests and System DiagnosticsSAFE State for Device and System Protection upon Detected System FailureClock Monitor for Internal OscillatorAnalog and Logic Built-In Self-TestCRC on Non-Volatile Memory as well as Device and System Configuration Registers and SPI CommunicationsReset Circuit for MCUDiagnostic Output PinSPI With CRC on Command Plus DataError Reporting Through SPI Registers for Errors on System Level and Device LevelEnable-Drive Output for Disabling External Power-Stages on Any Detected System FailureWake-up through IGN Pin (Ignition) or CAN_WU Pin (Transceiver or Other Function)48-Pin HTSSOP PowerPAD™ IC PackageAEC-Q100 Qualified with the Following Results:Device Temperature Grade 1: –40°C to +125°C Ambient Operating TemperatureDevice HBM ESD Classification Level 2Device CDM ESD Classification Level C4BFunctional Safety-CompliantDeveloped for Functional Safety ApplicationsDocumentation Availableto Aid ISO 26262 System Design up to ASIL DSystematic Capability and Hardware Integrity up to ASIL DInput Voltage Range7 to 36-V for Initial Battery Power Up4 to 36-V Full Functionality After Initial Battery Power UpMinimum 2.3 V During Operation After Wake-upSupply Rails (With Internal FETs)6-V Synchronous Buck-Boost Preregulator5-V, 285-mA LDO (CAN, Peripherals or ADC REF 1% Accuracy with 20 to 120 mA Load)3.3-V or 5-V, 350-mA LDO (MCU) TPS653850A-Q1.3.3-V 350-mA or 5-V 500 mA LDO (MCU)TPS653852A-Q12 LDOs Protected for Sensor Supply or Peripherals120 mA for Sensor Supply 1 (VSOUT1), 100 mA for Sensor Supply 2 (VSOUT2)Configurable Tracking Mode (Tracking Input Pin), or 3.3-V or 5-V Fixed Output VoltageShort-to-Ground and Battery ProtectionCharge Pump: 6-V Minimum, 11-V Maximum Above Battery VoltageMonitoring and ProtectionIndependent Undervoltage and Overvoltage Monitoring on All Regulator Outputs, Battery Voltage, and Internal SuppliesVoltage Monitoring Circuitry, Including Independent Bandgap Reference, Supplied from Separate Battery Voltage Input PinSelf-Check on All Voltage Monitoring (During Power-Up and After Power-Up Initiated by External MCU)All Supplies Protected with Current Limit and Overtemperature Prewarning and ShutdownMicrocontroller InterfaceOpen and Close Window or Question-Answer Watchdog FunctionMonitor for Functional Safety MCU Fault output (PWM or level), MCU Error-Signal MonitorDIAGNOSTIC state for Performing Device Self-Tests and System DiagnosticsSAFE State for Device and System Protection upon Detected System FailureClock Monitor for Internal OscillatorAnalog and Logic Built-In Self-TestCRC on Non-Volatile Memory as well as Device and System Configuration Registers and SPI CommunicationsReset Circuit for MCUDiagnostic Output PinSPI With CRC on Command Plus DataError Reporting Through SPI Registers for Errors on System Level and Device LevelEnable-Drive Output for Disabling External Power-Stages on Any Detected System FailureWake-up through IGN Pin (Ignition) or CAN_WU Pin (Transceiver or Other Function)48-Pin HTSSOP PowerPAD™ IC Package

Description

The TPS653850A-Q1 and TPS653852A-Q1 device is a multirail power supply designed to supply microcontrollers in safety relevant applications, such as those found in the automotive industry. The device supports functional safety microcontrollers with dual-core lockstep (LS) and other multi-core architectures. The TPS653850A-Q1 and TPS653852A-Q1 device integrates multiple supply rails to power the MCU, CAN or FlexRay, and external sensors. A buck-boost converter with internal FETs converts the input battery voltage between 2.3 V and 36 V to a 6-V preregulator output that supplies the other regulators. An integrated charge pump provides an overdrive voltage for the internal regulators, and can also be used to drive an external NMOS FET as reverse battery protection. The device supports wake-up from an ignition signal (IGN pin) or wake-up from a CAN transceiver or other signal (CAN_WU pin). An independent voltage monitoring unit inside the device monitors undervoltage and overvoltage on all internal supply rails and regulator outputs of the battery supply. Regulator current limits and temperature protections are also implemented. The TPS653850A-Q1 and TPS653852A-Q1 device features a question-answer watchdog, MCU error-signal monitor, clock monitoring on internal oscillator, self-check on clock monitor, cyclic redundancy check (CRC) on non-volatile memory and SPI communication, a diagnostic output pin allowing MCU to observe device internal analog and digital signals, a reset circuit for the MCU (NRES pin) and a safing output (ENDRV pin) to disable external power-stages on any detected system-failure. The device automatically runs a built-in self-test (BIST) at start up and the MCU may re-run the BIST during system run time through software control if needed. A dedicated DIAGNOSTIC state allows the MCU to check TPS653850A-Q1 and TPS653852A-Q1 functionality. The TPS653850A-Q1 and TPS653852A-Q1 device also has an error reporting capability through the SPI register. The device has separate status bits in the SPI register for each specific error on the system level or device level. When the device detects a particular error condition, it sets the appropriate status bit and keeps this status bit set until the MCU reads-out the SPI register in which this status bit was set. Based on which status bit was set, the MCU can decide whether it must keep the system in a safe state or whether it can resume with the operation of the system. The TPS653850A-Q1 and TPS653852A-Q1 device is available in a 48-pin HTSSOP PowerPAD™ IC package. The TPS653850A-Q1 and TPS653852A-Q1 device is a multirail power supply designed to supply microcontrollers in safety relevant applications, such as those found in the automotive industry. The device supports functional safety microcontrollers with dual-core lockstep (LS) and other multi-core architectures. The TPS653850A-Q1 and TPS653852A-Q1 device integrates multiple supply rails to power the MCU, CAN or FlexRay, and external sensors. A buck-boost converter with internal FETs converts the input battery voltage between 2.3 V and 36 V to a 6-V preregulator output that supplies the other regulators. An integrated charge pump provides an overdrive voltage for the internal regulators, and can also be used to drive an external NMOS FET as reverse battery protection. The device supports wake-up from an ignition signal (IGN pin) or wake-up from a CAN transceiver or other signal (CAN_WU pin). An independent voltage monitoring unit inside the device monitors undervoltage and overvoltage on all internal supply rails and regulator outputs of the battery supply. Regulator current limits and temperature protections are also implemented. The TPS653850A-Q1 and TPS653852A-Q1 device features a question-answer watchdog, MCU error-signal monitor, clock monitoring on internal oscillator, self-check on clock monitor, cyclic redundancy check (CRC) on non-volatile memory and SPI communication, a diagnostic output pin allowing MCU to observe device internal analog and digital signals, a reset circuit for the MCU (NRES pin) and a safing output (ENDRV pin) to disable external power-stages on any detected system-failure. The device automatically runs a built-in self-test (BIST) at start up and the MCU may re-run the BIST during system run time through software control if needed. A dedicated DIAGNOSTIC state allows the MCU to check TPS653850A-Q1 and TPS653852A-Q1 functionality. The TPS653850A-Q1 and TPS653852A-Q1 device also has an error reporting capability through the SPI register. The device has separate status bits in the SPI register for each specific error on the system level or device level. When the device detects a particular error condition, it sets the appropriate status bit and keeps this status bit set until the MCU reads-out the SPI register in which this status bit was set. Based on which status bit was set, the MCU can decide whether it must keep the system in a safe state or whether it can resume with the operation of the system. The TPS653850A-Q1 and TPS653852A-Q1 device is available in a 48-pin HTSSOP PowerPAD™ IC package.