TPS65381A-Q1 Datasheet, PDF (1/7 Pages) Texas Instruments – Multi-Rail Power Supply for Microcontrollers in Safety Applications

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TPS65381A-Q1
SLVSDJ1 – JULY 2016
TPS65381A-Q1 Multi-Rail Power Supply for Microcontrollers in Safety 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
• Multi-Rail Power Supply Supporting Among
Others
– Texas Instruments TMS570LS Series
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-
Voltage Functional)
– 6-V Asynchronous Switch-Mode Preregulator
With Internal FET, 1.3-A Current-Limit, and
Temperature Protection
– 5-V (CAN) Supply Voltage, Linear Regulator
With Internal FET, 350-mA Current-Limit, and
Temperature Protection
– 3.3-V or 5-V MCU I/O Voltage, Linear Regulator
With Internal FET, 350-mA Current-Limit, and
Temperature Protection
– 0.8-V to 3.3-V Adjustable MCU Core Voltage,
Linear Regulator Controller With External FET
– Sensor Supply: Linear Tracking Regulator With
Tracking Input, 100-mA Current-Limit,
Temperature Protection, and Protection Against
Short-to-Battery 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 Bandgap Reference for Voltage
Monitoring
– Independent Voltage References for Regulator
References and Voltage Monitoring. Voltage-
Monitoring Circuitry With Separate Battery
Voltage Input Pin
– Self-Check on all Voltage Monitoring (During
Power-Up and After Power-Up Initiated by
External MCU)
– Junction Temperature Sensing With Shutdown
Thresholds
• Microcontroller Interface
– Watchdog: Trigger Mode (OPEN/CLOSE
Window) or Question and Answer Mode
– MCU Error-Signal Monitor (Supports TI TMS570
MCU Mode or Other MCUs With Pulse-Width
Modulation [PWM] Signaling)
– 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 Oscillators
– Self-Tests for Analog- and Digital-Critical
Circuits Executed With Every Device Power Up
or Activated by MCU in DIAGNOSTIC State
– CRC on Non-Volatile Memory, Device, and
System Configuration Registers
– Reset circuit for MCU
– Diagnostic Output Pin Allowing MCU to Observe
Internal Analog and Digital Signals of the
Device, Selectable Through Multiplexer
• SPI
– Configuring IC Registers
– Watchdog Question-Answering
– Diagnostic 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
• Wake-Up 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. PRODUCT PREVIEW Information. Product in design phase of
development. Subject to change or discontinuance without notice.