TPS653850A-Q1
Functional safety compliant multi-rail power supply for safety MCUs with 350mA I/O rail
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TPS653850A-Q1
- AEC-Q100 Qualified with the Following Results:
- Device Temperature Grade 1: –40°C to +125°C Ambient Operating Temperature
- Device HBM ESD Classification Level 2
- Device CDM ESD Classification Level C4B
- Functional Safety-Compliant
- Developed for Functional Safety Applications
- Documentation Available to Aid ISO 26262 System Design up to ASIL D
- Systematic Capability and Hardware Integrity up to ASIL D
- Input Voltage Range
- 7 to 36-V for Initial Battery Power Up
- 4 to 36-V Full Functionality After Initial Battery Power Up
- Minimum 2.3 V During Operation After Wake-up
- Supply Rails (With Internal FETs)
- 6-V Synchronous Buck-Boost Preregulator
- 5-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-Q1
- 2 LDOs Protected for Sensor Supply or Peripherals
- 120 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 Voltage
- Short-to-Ground and Battery Protection
- Charge Pump: 6-V Minimum, 11-V Maximum Above Battery Voltage
- Monitoring and Protection
- Independent Undervoltage and Overvoltage Monitoring on All Regulator Outputs, Battery Voltage, and Internal Supplies
- Voltage Monitoring Circuitry, Including Independent Bandgap Reference, Supplied from Separate Battery Voltage Input Pin
- Self-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 Shutdown
- Microcontroller Interface
- Open and Close Window or Question-Answer Watchdog Function
- Monitor for Functional Safety MCU Fault output (PWM or level), MCU Error-Signal Monitor
- DIAGNOSTIC state for Performing Device Self-Tests and System Diagnostics
- SAFE State for Device and System Protection upon Detected System Failure
- Clock Monitor for Internal Oscillator
- Analog and Logic Built-In Self-Test
- CRC on Non-Volatile Memory as well as Device and System Configuration Registers and SPI Communications
- Reset Circuit for MCU
- Diagnostic Output Pin
- SPI With CRC on Command Plus Data
- Error Reporting Through SPI Registers for Errors on System Level and Device Level
- Enable-Drive Output for Disabling External Power-Stages on Any Detected System Failure
- Wake-up through IGN Pin (Ignition) or CAN_WU Pin (Transceiver or Other Function)
- 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.
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For more information on the TPS653850A-Q1 For additional terms or required resources, click any title below to view the detail page where available. TMDSCNCD263 is an HSEC180 controlCARD based evaluation and development tool for the AM263x series Sitara™ high-performance microcontrollers. This board is ideal for initial evaluation and prototyping as it provides a standardized and easy-to-use platform to develop your next application. (...) Recommended products may have parameters, evaluation modules or reference designs related to this TI product. Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use. If you have questions about quality, packaging or ordering TI products, see TI support. TPS653850/51/50A/51A/52A-Q1 Safety Analysis Report TPS653850/51/50A/51A/52A-Q1 Safety ManualTechnical documentation
Type Title Date * Data sheet TPS653850A-Q1 and TPS653852A-Q1 Multirail Power Supply for Microcontrollers in Safety-Relevant Applications datasheet (Rev. A) PDF | HTML 18 Feb 2021 Design & development
TMDSCNCD263 — AM263x general-purpose controlCARD™ development kit Arm®-based MCU
TPS653850EVM — Evaluation Module for Multi-Rail Power Supply for Microcontrollers in Automotive
DRV3255-Q1-EVM-DESIGN — DRV3255-Q1 evaluation module restriction
Supported products & hardware
Products
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AC/DC & DC/DC converters (integrated FET)
Multi-channel ICs (PMICs)
DRV3255-Q1-SAFETY-DOCS — DRV3255-Q1 safety documentation
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BLDC drivers
AC/DC & DC/DC converters (integrated FET)
Multi-channel ICs (PMICs)
TPS653850-Q1-DESIGN — TPS653850-Q1 Design Files
Supported products & hardware
Products
Multi-channel ICs (PMICs)
TPS653850-Q1-DESIGN-SAFETY — TPS653850-Q1 Functional Safety Docs
Supported products & hardware
Products
Multi-channel ICs (PMICs)
Package Pins CAD symbols, footprints & 3D models HTSSOP (DCA) 48 Ultra Librarian Ordering & quality
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TI E2E™ forums with technical support from TI engineers
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TPS653850-Q1-DESIGN-SAFETY — TPS653850-Q1 Functional Safety Docs
Multi-channel ICs (PMICs)
Documentation
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DRV3255-Q1-EVM-DESIGN — DRV3255-Q1 evaluation module restriction
Simplified PSPICE model of DRV3255-Q1
Software for simple trapezoidal commutation algorithm for DRV3255EVM
Design files for DRV3255EVM
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AC/DC & DC/DC converters (integrated FET)
Multi-channel ICs (PMICs)
Documentation
User guide of simplified DRV3255-Q1 PSPICE model
Using DRV3255 on DRV3256EVM
DRV3255EVM user guide
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TPS653850-Q1-DESIGN — TPS653850-Q1 Design Files
TPS65385x-Q1 EVM: Design Files
TPS65385x-Q1 EMC Board: Design Files
TPS65385x-Q1 EVM: GUI Installer
Multi-channel ICs (PMICs)
Documentation
TPS653850-Q1 Datasheet
TPS653850-Q1 Datasheet (Japanese Translation)
TPS653850A/52A-Q1 Datasheet
TPS653850-Q1 App Report: Design Checklist
TPS653850-Q1 App Report: Efficiency and Quiescent Current in Low-Power Mode
TPS65385x-Q1 App Report: Power OFF When MCU Stops SPI Communication
TPS65385x-Q1 App Report: EMC Design for passing CISRP25 conducted and radiated emissions
TPS65385x-Q1 EVM: User's Guide
FAQ: CRC Calculator - SPI and Register - Example Spreadsheet
FAQ: Software Concept Flowchart Example
FAQ: PCB Recommendations and Example Design for EMC Optimization and Results
FAQ: TI Sitara AM263x Power Solution
FAQ: TI Sitara AM263x PMIC and Core Rail Schematics
FAQ: TPS65385xx-Q1 device variants comparison table
FAQ: Power Loss Estimator
FAQ: Watchdog and ESM Calculator
FAQ: Watchdog configuration
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DRV3255-Q1-SAFETY-DOCS — DRV3255-Q1 safety documentation
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AC/DC & DC/DC converters (integrated FET)
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DRV325x-Q1 Safety Manual
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Functional Safety Analysis Report Summary DRV325x-Q1
ALL FETS OFF Safety Analysis Report
ASC Safety Analysis Report
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- Secure resources have been migrated to a new user experience at www.ti.com/secureresources
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DRV3255-Q1-DATA-SHEET — DRV3255-Q1 full data sheet
BLDC drivers
AC/DC & DC/DC converters (integrated FET)
Multi-channel ICs (PMICs)
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Current sense amplifier error calculator
DRV3255E_Datasheet
DRV3256_Datasheet
DRV325x Errata Addition
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DRV3256A Datasheet
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- Secure resources have been migrated to a new user experience at www.ti.com/secureresources