TPS65381-Q1
www.ti.com
SLVSBC4 –MAY 2012
Multi-Rail Power Supply for Microcontrollers in Safety-Critical Applications
Check for Samples: TPS65381-Q1
1
FEATURES
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Wake-Up Through Deglitched Ignition
Signal
2
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Multi-Rail Power Supply Supporting Among
Others:
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Wake-Up Through CAN WAKEUP Pin
Enable Circuit for Peripheral Device Wake-
Up Circuitry or Power Stages
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Texas Instruments TMS570LS Series 16/32-
Bit RISC Flash Microcontroller
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Junction Temperature Sensing With
Shutdown Thresholds
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Supply Rails:
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Input voltage range:
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Microcontroller Interface
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5.8 V to 36 V (CAN, I/O, MCU Core, and
Sensor Supply Regulators Functional)
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Open/Close Window or Question-Answer
Watchdog Function
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4.5 V to 5.8 V (3.3-V I/O and MCU Core
Voltage Functional)
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MCU Error-Signal Monitor (Supports TI
TMS570 MCU Mode or Other MCUs with
PWM-Like Signaling)
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6-V Asynchronous Switch-Mode Pre-
Regulator With Internal FET, 1.5-A Current
Limit, and Temperature Protection
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DIAGNOSTIC State for Performing Device
Self-Tests, Diagnostics, and External
Interconnect Checks.
5-V (CAN) Supply Voltage, Linear Regulator
With Internal FET, and Temperature
Protection
Safe-State for Device and System
Protection on Error Event Detection
3.3-V or 5-V MCU I/O Voltage, Linear
Regulator With Internal FET, and
Temperature Protection
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Clock Monitor for Internal Oscillators
Self-Tests for Analog and Digital Critical
Circuits Executed With Every Device Power
Up or Activated by External MCU in
DIAGNOSTIC State
0.8-V to 3.3-V Adjustable MCU Core
Voltage, Linear Regulator Controller With
External FET
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CRC on Non-Volatile Memory and
Device/System Configuration Registers
Sensor Supply: Linear Tracking Regulator
With Tracking Input, 300-mA Current Limit,
Temperature Protection, and Protection
Against Short to Battery and Short to
Ground
Reset circuit for MCU
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SPI Interface
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Configuring IC Registers
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Reverse Battery Protection With External
FET Allowing for Low-Voltage Operation
Down To 4.5 V
Watchdog Question-Answering
Diagnostic Readout
Compliant With 3.3-V and 5-V Logic Levels
Charge Pump: Typ. 12 V Above Battery
Voltage
Package: 32-Pin HTSSOP PowerPAD™
Package
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Power Supply / System Monitoring:
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Under- and Overvoltage Monitoring on All
Regulator Outputs, Battery Voltage, and
Internal Supplies
APPLICATIONS
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Safety Critical Automotive Applications
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Electrical Power Steering (EPS, EHPS)
Self-Check on All Voltage Monitoring
(During Power Up and After Power Up
Initiated by External MCU)
Braking
Suspension
Airbag
Independent Voltage References for
Regulator References and Voltage
Monitoring. Voltage-Monitoring Circuitry
With Separate Battery Voltage Input
•
Industrial Safety Applications
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2
PowerPAD is a trademark of Texas Instruments.
PRODUCT PREVIEW information concerns products in the
formative or design phase of development. Characteristic data and
other specifications are design goals. Texas Instruments reserves
the right to change or discontinue these products without notice.
Copyright © 2012, Texas Instruments Incorporated