TPS65381-Q1 Datasheet, PDF (1/63 Pages) Texas Instruments – Multi-Rail Power Supply for Microcontrollers in Safety-Critical Applications

TPS65381-Q1
www.ti.com
SLVSBC4 – MAY 2012
Multi-Rail Power Supply for Microcontrollers in Safety-Critical Applications
Check for Samples: TPS65381-Q1
FEATURES
1
•2 Multi-Rail Power Supply Supporting Among
Others:
– Texas Instruments TMS570LS Series 16/32-
Bit RISC Flash Microcontroller
• 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 Pre-
Regulator With Internal FET, 1.5-A Current
Limit, and Temperature Protection
– 5-V (CAN) Supply Voltage, Linear Regulator
With Internal FET, and Temperature
Protection
– 3.3-V or 5-V MCU I/O Voltage, Linear
Regulator With Internal FET, 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, 300-mA Current Limit,
Temperature Protection, and Protection
Against Short to Battery and Short to
Ground
– Reverse Battery Protection With External
FET Allowing for Low-Voltage Operation
Down To 4.5 V
– Charge Pump: Typ. 12 V Above Battery
Voltage
• Power Supply / System Monitoring:
– Wake-Up Through Deglitched Ignition
Signal
– Wake-Up Through CAN WAKEUP Pin
– Enable Circuit for Peripheral Device Wake-
Up Circuitry or Power Stages
– Junction Temperature Sensing With
Shutdown Thresholds
• Microcontroller Interface
– Open/Close Window or Question-Answer
Watchdog Function
– MCU Error-Signal Monitor (Supports TI
TMS570 MCU Mode or Other MCUs with
PWM-Like 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 External MCU in
DIAGNOSTIC State
– CRC on Non-Volatile Memory and
Device/System Configuration Registers
– Reset circuit for MCU
• SPI Interface
– Configuring IC Registers
– Watchdog Question-Answering
– Diagnostic Readout
– Compliant With 3.3-V and 5-V Logic Levels
• Package: 32-Pin HTSSOP PowerPAD™
Package
– Under- and Overvoltage Monitoring on All
Regulator Outputs, Battery Voltage, and
Internal Supplies
APPLICATIONS
• Safety Critical Automotive Applications
– Self-Check on All Voltage Monitoring
– Electrical Power Steering (EPS, EHPS)
(During Power Up and After Power Up
– Braking
Initiated by External MCU)
– Suspension
– Independent Voltage References for
Regulator References and Voltage
Monitoring. Voltage-Monitoring Circuitry
– Airbag
• Industrial Safety Applications
With Separate Battery Voltage Input
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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.
PowerPAD is a trademark of Texas Instruments.
2
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