TPS65381A-Q1_17 Datasheet, PDF (1/120 Pages) Texas Instruments – Multirail Power Supply for Microcontrollers in Safety-Relevant Applications

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TPS65381A-Q1
SLVSDJ1A – JULY 2016 – REVISED MAY 2017
TPS65381A-Q1 Multirail Power Supply for Microcontrollers in Safety-Relevant
Applications
1 Device Overview
1.1 Features
1
• Qualified for Automotive Applications
• AEC-Q100 Qualified With the Following
Results:
– Device Temperature Grade 1: –40°C 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 Hercules™ TMS570, C2000™, and Various
Functional-Safety Architecture Microcontrollers
• Supply Rails
– Input voltage range:
– 5.8 V to 36 V (CAN, I/O, MCU Core, and
Sensor-Supply Regulators Functional)
– 4.5 V to 5.8 V (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
– 3.3-V or 5-V (MCU I/O) Voltage, Linear
Regulator With Internal FET, 300-mA Output
Current
– 0.8-V to 3.3-V Adjustable (MCU Core Voltage),
Linear Regulator Controller With External FET
– 3.3-V to 9.5-V Adjustable Sensor Supply: Linear
Tracking Regulator With Internal FET, 100-mA
Output Current, and Protection Against Short-to-
Supply 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. Voltage-
Monitoring Circuitry With Independent Bandgap
Reference and Separate Supply Input Pin
– 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 Dual-
Core MCUs Including Hercules™ TMS570,
C2000™, and Various Functional-Safety
Architecture MCUs Using Pulse-Width
Modulation (PWM) Error Output
– DIAGNOSTIC State for Performing Device Self-
Tests, 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 System-
Failure
• Wakeup Through IGNITION Pin or CAN
WAKEUP Pin
• Package: 32-Pin HTSSOP PowerPAD™ IC
Package
1
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.