Overview
The TPS65381A-Q1 device, produced by Texas Instruments, is a multirail power supply designed to supply microcontrollers (MCUs) in safety-relevant applications, particularly in automotive and industrial markets. It supports various MCU families, including Texas Instruments’ Hercules™ TMS570 and C2000™, as well as other MCUs with dual-core lockstep (LS) or loosely-coupled architectures (LC). The device integrates multiple supply rails to power the MCU, controller area network (CAN), FlexRay, and external sensors, ensuring comprehensive power management for critical systems.
Key Specifications
| Parameter | Specification |
|---|---|
| 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) |
| Output Voltages | 6-V Asynchronous Switch Mode Preregulator 5-V (CAN) Supply Voltage, Linear Regulator 3.3-V or 5-V (MCU I/O) Voltage, Linear Regulator 0.8-V to 3.3-V Adjustable (MCU Core Voltage) 3.3-V to 9.5-V Adjustable Sensor Supply |
| Output Currents | 1.3-A (6-V Preregulator) 300-mA (5-V CAN and MCU I/O) 100-mA (Sensor Supply) |
| Operating Temperature | –40°C to +125°C (Device Temperature Grade 1) |
| ESD Classification | HBM ESD Classification Level H2 CDM ESD Classification Level C3B |
| Package | 32-Pin HTSSOP PowerPAD |
Key Features
- Qualified for Automotive Applications: AEC-Q100 Qualified
- Supports TI Hercules™ TMS570, C2000™, and various functional-safety architecture microcontrollers
- Multiple supply rails with internal FETs for CAN, I/O, MCU Core, and sensor supplies
- Adjustable linear-regulator controller for MCU core supply (0.8 V to 3.3 V)
- Integrated charge pump for overdrive voltage and reverse-battery protection
- Undervoltage and overvoltage monitoring on all regulator outputs and battery voltage
- Regulator current-limits and temperature protections
- Watchdog with trigger and question and answer modes, MCU error-signal monitor, and clock monitoring
- Diagnostic output pin for observing internal signals, reset circuit, and enable drive output for system protection
- Built-in self-test (BIST) for device functionality at power-up
Applications
- Safety Automotive Applications:
- Power Steering: Electrical Power Steering (EPS) and Electro Hydraulic Power Steering (EHPS)
- Braking: Anti-Lock Brake System (ABS), Electronic Stability Control (ESC), and Electric Parking Brake
- Advanced Driver Assistance Systems (ADAS)
- Suspension
- Industrial Safety Applications:
- Safety Programmable-Logic Controllers (PLCs)
- Safety I/O Control Modules
- Test and Measurement
- Railway and Subway Signal Control and Safety Modules
- Elevator and Escalator Safety Control
- Wind Turbine Control
Q & A
- What is the primary function of the TPS65381A-Q1 device?
The TPS65381A-Q1 is a multirail power supply designed to supply microcontrollers in safety-relevant applications. - What MCU families does the TPS65381A-Q1 support?
The device supports Texas Instruments’ Hercules™ TMS570 and C2000™ MCU families, as well as other MCUs with dual-core lockstep (LS) or loosely-coupled architectures (LC). - What is the input voltage range for the TPS65381A-Q1?
The input voltage range is 5.8 V to 36 V for full functionality and 4.5 V to 5.8 V for limited functionality. - What are the output voltages provided by the TPS65381A-Q1?
The device provides 6-V, 5-V, 3.3-V, and adjustable output voltages for MCU core and sensor supplies. - What protection features does the TPS65381A-Q1 include?
The device includes undervoltage and overvoltage monitoring, regulator current-limits, temperature protections, and a built-in self-test (BIST). - How does the TPS65381A-Q1 handle reverse-battery protection?
The integrated charge pump can be used in a reverse-battery protection circuit to control an external NMOS transistor. - What is the operating temperature range for the TPS65381A-Q1?
The operating temperature range is –40°C to +125°C (Device Temperature Grade 1). - What package type is the TPS65381A-Q1 available in?
The device is available in a 32-Pin HTSSOP PowerPAD package. - Does the TPS65381A-Q1 support diagnostic and monitoring functions?
Yes, it includes a diagnostic output pin, watchdog, MCU error-signal monitor, and clock monitoring. - What are some of the key applications for the TPS65381A-Q1?
The device is used in safety automotive applications such as power steering, braking, and ADAS, as well as industrial safety applications like safety PLCs and wind turbine control.
