TPS65381AQDAPTQ1

Overview

The TPS65381AQDAPTQ1 is a multi-rail power management IC (PMIC) designed for safety-related applications in automotive and industrial markets. It provides power to microcontrollers, CAN/FlexRay transceivers, and external sensors. The device features an input voltage range of 4.5V to 36V and includes five outputs: a 6V pre-regulator, two fixed linear regulators (5V and 5V/3.3V), one adjustable LDO (0.8V–3.3V), and a sensor supply. It operates within a temperature range of -40°C to +125°C, supports AEC-Q100 Grade 1 qualification, and utilizes a 32-pin HTSSOP package.

Feature Summary

• Integrated functional safety architecture supporting ISO 26262 requirements with built-in self-test (BIST) and diagnostic capabilities.
• Comprehensive monitoring and protection mechanisms including undervoltage/overvoltage detection, current limiting, and thermal shutdown.
• Flexible output configuration with dedicated rails for MCU cores, I/Os, communication interfaces, and external sensors.
• Supports wake-up from ignition signals or CAN transceivers with integrated charge pump for reverse battery protection.

Applications

• Powering Hercules TMS570 and C2000 microcontroller series in safety-critical systems
• Industrial safety controller modules requiring redundant power supervision
• Automotive electronic control units (ECUs) with CAN or FlexRay interface requirements

Procurement Notes

Verify the specific suffix 'TQ1' against official Texas Instruments documentation to confirm it denotes the tape-and-reel packaging variant of the standard TPS65381A-Q1. Ensure the component meets the required Automotive Electronics Council (AEC-Q100) Grade 1 specifications for your target environment. Cross-reference the 32-pin HTSSOP PowerPAD footprint with your PCB design guidelines to ensure mechanical compatibility.

Selection Notes

Select this PMIC when designing systems that require integrated power sequencing and rigorous fault monitoring for safety-certified microcontrollers. It is suitable for applications needing multiple regulated voltages from a single high-voltage input source. Consider its diagnostic outputs if system-level health monitoring is mandatory. Evaluate the 32-pin package constraints against available board space and thermal dissipation requirements for the intended operating conditions.

Part Context

This component belongs to the TPS65381A-Q1 family of professional power management ICs. It is specifically engineered for functional safety applications, distinguishing itself from general-purpose PMICs through its extensive diagnostic features and compliance with automotive reliability standards. The device integrates multiple power stages into a single solution to reduce bill-of-materials count and board area.

Replacement Considerations

Direct substitutes include other members of the TPS65381-Q1 family with compatible pinouts and electrical characteristics. Verify functional safety integrity levels and output configurations before swapping with similar PMICs from different manufacturers.

FAQ

Does the TPS65381AQDAPTQ1 support wake-up from CAN bus activity?

Yes, the device supports wake-up functionality triggered by either an ignition signal or a CAN transceiver.

What is the purpose of the integrated charge pump in this device?

The charge pump provides overdrive voltage for internal regulators and can be used to control an external NMOS transistor for reverse battery protection, allowing operation at lower minimum battery voltages.