Details, datasheet, quote on part number: TPS65381AQDAPTQ1
CategorySemiconductors => Power Management => Power Management Multi-Channel IC (PMIC) Solutions
Part familyTPS65381A-Q1 Multi-Rail Power Supply for Microcontrollers in Safety Applications
TitlePower Management Specialised - PMIC Multi-Rail Power Supply for Microcontrollers in Safety Applications
DescriptionMulti-Rail Power Supply for Microcontrollers in Safety Applications 32-HTSSOP -40 to 125
CompanyTexas Instruments Inc.
DatasheetDownload TPS65381AQDAPTQ1 datasheet
Output Voltage Range
Output Current1.3 A
Input Voltage Range4.5 V to 5.8 V, 5.8 V to 36 V
Input Current
Operating Temperature Range- 40 C to + 125 C
Mounting StyleSMD/SMT
TypeMultirail Power Supply
PackagingCut Tape, eel, Reel
  Mecanical Data
Pin nbPackage typeInd stdJEDEC codePackage qtyCarrierDevice markWidth (mm)Length (mm)Thick (mm)Pitch (mm)
32DAPHTSSOPR-PDSO-G250SMALL T&RTPS65381A 6.2111.15.65
Application notes
• Device Behavior Under Slow VBAT Ramp-Down and Ramp-Up
This application report explains device behavior under slow battery-supply voltage ramp-up and ramp-downconditions, based on device supply-rail configuration. Laboratory test results and device simulationsresults are included to support the analysis and de | Doc
• TPS65381-Q1 and TPS65381A-Q1 Design Checklist (Rev. A)
This checklist is provided as an aid for customers of Texas Instruments related to their use of the TPS65381-Q1 and TPS65381A-Q1 (TPS65381x-Q1) device. | Doc
• Efficiency Evaluation TPS65381-Q1
The TPS65381 is a multi-rail power supply designed to supply microcontrollers in safety critical applications, such as those found in automotive functions. The device supports Texas Instruments’ TMS570LS series 16/32-Bit RISC Flash MCU and other microcon | Doc
• Safety Manual for TPS65381-Q1 and TPS65381A-Q1 Multirail Power Supply (Rev. B)
This document is a safety manual for the Texas Instruments TPS65381x-Q1 (TPS65381-Q1 and TPS65381A-Q1) multirail power supply. This manual provides information to help developers integrate the TPS65381x-Q1 device into safety related systems. | Doc
• DPI Evaluation TPS65381-Q1
The TPS65381 is a multi-rail power supply designed to supply microcontrollers in safety criticalapplications, such as those found in automotive. The devices supports Texas Instruments TMS570LSseries 16/32-Bit RISC Flash MCU and other microcontrollers with | Doc
Evaluation Kits
TPS65381EVM: TPS65381EVM - EVM for Multi-Rail Power Supply for Microcontrollers in Safety-Critical Applications

Others parts numbering
TPS65381AQDAPRQ1baebfwqsuytr: Power Management Specialised - PMIC Multi-Rail Power Supply for Microcontrollers in Safety Applications 32-HTSSOP -40 to 125


Features, Applications

TPS65381A-Q1 Multirail Power Supply for Microcontrollers in Safety-Relevant Applications

­ Self-Check on all Voltage Monitoring (Automatic During Power-Up and After Power-Up Initiated by External MCU) ­ All Supplies With Internal FETs Protected With Current-Limit and Overtemperature Shutdown Microcontroller (MCU) Interface ­ Watchdog: Trigger Mode (OPEN/CLOSE Window) or Question and Answer Mode ­ MCU Error-Signal Monitor For Lock-Step DualCore MCUs Including HerculesTM TMS570, C2000TM, and Various Functional-Safety Architecture MCUs Using Pulse-Width Modulation (PWM) Error Output ­ DIAGNOSTIC State for Performing Device SelfTests, Diagnostics, and External Interconnect Checks ­ SAFE State for Device and System Protection on Error Event Detection ­ Clock Monitor for Internal Oscillator ­ Self-Tests for Analog- and Digital-Critical Circuits Executed With Every Device Power Up or Activated by MCU in DIAGNOSTIC State ­ CRC on Nonvolatile Memory, Device and Configuration Registers ­ Reset Circuit and Output Pin for MCU ­ Diagnostic Output Pin Allowing MCU to Observe Through a Multiplexer Internal Analog and Digital Signals of the Device Serial Peripheral Interface (SPI) ­ Configuration Registers ­ Watchdog Question and Answers ­ Diagnostic Status Readout ­ Compliant With 3.3-V and 5-V Logic Levels Enable Drive Output for Disabling Safing-Path or External Power-Stages on Detected SystemFailure Wakeup Through IGNITION Pin or CAN WAKEUP Pin Package: 32-Pin HTSSOP PowerPADTM IC Package

Qualified for Automotive Applications AEC-Q100 Qualified With the Following Results: ­ Device Temperature Grade to +125°C Ambient Operating Temperature ­ Device HBM ESD Classification Level H2 ­ Device CDM ESD Classification Level C3B Multirail Power Supply Supporting Among Others ­ TI HerculesTM TMS570, C2000TM, and Various Functional-Safety Architecture Microcontrollers Supply Rails ­ Input voltage range: 36 V (CAN, I/O, MCU Core, and Sensor-Supply Regulators Functional) (3.3 V I/O and MCU Core Regulators Functional) ­ 6-V Asynchronous Switch Mode Preregulator With Internal FET, 1.3-A Output Current ­ 5-V (CAN) Supply Voltage, Linear Regulator With Internal FET, 300-mA Output Current or 5-V (MCU I/O) Voltage, Linear Regulator With Internal FET, 300-mA Output Current to 3.3-V Adjustable (MCU Core Voltage), Linear Regulator Controller With External FET to 9.5-V Adjustable Sensor Supply: Linear Tracking Regulator With Internal FET, 100-mA Output Current, and Protection Against Short-toSupply and Short-to-Ground ­ Charge Pump: Typically 12 V Above Battery Voltage Power Supply and System Monitoring ­ Independent Undervoltage and Overvoltage Monitoring on All Regulator Outputs, Battery Voltage, and Internal Supplies ­ Independent Voltage References for Regulator References and Voltage Monitoring. VoltageMonitoring Circuitry With Independent Bandgap Reference and Separate Supply Input Pin

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA.


Industrial Safety Applications ­ Safety Programmable-Logic Controllers (PLCs) ­ Safety I/O Control Modules ­ Test and Measurement ­ Railway and Subway Signal Control and Safety Modules ­ Elevator and Escalator Safety Control ­ Wind Turbine Control

Safety Automotive Applications ­ Power Steering: Electrical Power Steering (EPS) and Electro Hydraulic Power Steering (EHPS) ­ Braking: Anti-Lock Brake System (ABS), Electronic Stability Control (ESC), and Electric Parking Brake ­ Advanced Driver Assistance Systems (ADAS) ­ Suspension


The TPS65381A-Q1 device is a multirail power supply designed to supply microcontrollers (MCUs) in safety-relevant applications, such as those found in automotive and industrial markets. The device supports Texas Instruments' HerculesTM TMS570 MCU and C2000TM MCU families, and various other MCUs with dual-core lockstep (LS) or loosely-coupled architectures (LC). The TPS65381A-Q1 device integrates multiple supply rails to power the MCU, controller area network (CAN), or FlexRay, and an external sensor. An asynchronous-buck switch-mode power-supply converter with an internal FET converts the input supply (battery) voltage a 6-V preregulator output. This 6-V preregulator supplies the other regulators. The device supports wakeup from IGNITION or wakeup from the CAN transceiver. The integrated, fixed 5-V linear regulator with internal FET can be used for a CAN or FlexRay transceiver supply for example. A second linear regulator, also with an internal FET, regulates to a selectable or 3.3-V output which, for example, can be use for the MCU I/O voltage. The TPS65381A-Q1 device includes an adjustable linear-regulator controller, requiring an external FET and resistor divider, that regulates to an adjustable voltage of between 0.8 V and 3.3 V which may be used for the MCU core supply. The integrated sensor supply can be run in tracking mode or adjustable output mode and includes shortto-ground and short-to-battery protection. Therefore, this regulator can power a sensor outside the module or electronic control unit (ECU). The integrated charge pump provides overdrive voltage for the internal regulators. The charge pump can also be used in a reverse-battery protection circuit by using the charge-pump output to control an external NMOS transistor. This solution allows for a lower minimum-battery-voltage operation compared to a traditional reverse-battery blocking diode when the device must be operational at the lowest possible supply voltages. The device monitors undervoltage and overvoltage on all regulator outputs, battery voltage, and internal supply rails. A second bandgap reference, independent from the main bandgap reference, is used for the undervoltage and overvoltage monitoring, to avoid any drifts in the main bandgap reference from being undetected. In addition, regulator current-limits and temperature protections are implemented. The TPS65381A-Q1 device has monitoring and protection functions, which include the following: watchdog with trigger and question and answer modes, MCU error-signal monitor, clock monitoring on internal oscillators, self-check on the clock monitor, cyclic redundancy check (CRC) on nonvolatile memory, a diagnostic output pin allowing the MCU to observe internal analog and digital signals of the device, a reset circuit and output pin for the MCU, and an enable drive output to disable the safing-path or external-power stages on detected faults. A built-in self-test (BIST) monitors the device functionality automatically at power-up. A dedicated DIAGNOSTIC state allows the MCU to check TPS65381A-Q1 monitoring and protection functions. The TPS65381A-Q1 device is offered a 32-pin HTSSOP PowerPAD package.

Device Overview Submit Documentation Feedback Product Folder Links: TPS65381A-Q1
For all available packages, see the orderable addendum at the end of the data sheet.


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