Overview
The TPS653853A-Q1, part number O3853AQDCARQ1, is a multirail power supply designed by Texas Instruments for safety-relevant applications, particularly in the automotive industry. This device is engineered to support functional safety microcontrollers with dual-core lockstep (LS) and other multi-core architectures. It integrates multiple supply rails to power the MCU, CAN or FlexRay, and external sensors, ensuring robust and reliable operation in critical systems.
Key Specifications
| Parameter | Specification |
|---|---|
| Package | 48-pin HTSSOP (DCA) PowerPAD™ IC package |
| Operating Temperature Range | -40°C to +125°C |
| Input Voltage Range | 7 to 36 V for initial battery power up, 4 to 36 V for full functionality after initial power up, minimum 2.3 V during operation after wake-up |
| Supply Rails | 6-V synchronous buck-boost preregulator, 5-V 285-mA LDO, 3.3-V or 5-V 350-mA LDO (MCU), 2 LDOs for sensor supply or peripherals (120 mA for VSOUT1, 20 mA for VSOUT2) |
| ESD Classification | Device HBM ESD Classification Level 2, Device CDM ESD Classification Level C4B |
| Functional Safety Compliance | Developed for functional safety applications, supports ISO 26262 system design up to ASIL D |
Key Features
- AEC-Q100 Qualified with Device Temperature Grade 1: –40°C to +125°C Ambient Operating Temperature
- Functional Safety-Compliant with systematic capability and hardware integrity up to ASIL D
- Multiple supply rails with internal FETs, including a 6-V synchronous buck-boost preregulator and LDOs for MCU, CAN, and peripherals
- Configurable tracking mode or fixed output voltage for sensor supplies
- Short-to-ground and battery protection with a charge pump providing overdrive voltage
- Independent undervoltage and overvoltage monitoring on all regulator outputs and battery voltage
- Steering-angle monitoring (SAM) unit with rotation counter and low-power mode
- Microcontroller interface with watchdog, error-signal monitor, clock monitoring, and built-in self-test (BIST)
- Dedicated diagnostic state for device self-tests and system diagnostics
- Error reporting through SPI registers with CRC on non-volatile memory and SPI communication
- Wake-up capability through IGN pin or CAN_WU pin
Applications
The TPS653853A-Q1 is primarily used in safety-relevant applications within the automotive industry. It supports microcontrollers in systems that require high reliability and functional safety, such as those involving steering-angle monitoring, sensor systems, and other critical automotive functions. Additionally, it can be used in industrial safety-relevant applications where robust power supply and monitoring are essential.
Q & A
- What is the primary application of the TPS653853A-Q1?
The TPS653853A-Q1 is primarily used in safety-relevant applications within the automotive industry, particularly for microcontrollers requiring high reliability and functional safety.
- What is the operating temperature range of the TPS653853A-Q1?
The operating temperature range is -40°C to +125°C.
- What are the input voltage ranges for the TPS653853A-Q1?
The input voltage range is 7 to 36 V for initial battery power up and 4 to 36 V for full functionality after initial power up, with a minimum of 2.3 V during operation after wake-up.
- What types of supply rails does the TPS653853A-Q1 provide?
The device provides a 6-V synchronous buck-boost preregulator, a 5-V 285-mA LDO, a 3.3-V or 5-V 350-mA LDO for the MCU, and two LDOs for sensor supply or peripherals.
- Does the TPS653853A-Q1 support functional safety standards?
Yes, it is developed for functional safety applications and supports ISO 26262 system design up to ASIL D.
- What kind of protection mechanisms does the TPS653853A-Q1 have?
The device includes independent undervoltage and overvoltage monitoring, current limits, overtemperature prewarning and shutdown, and short-to-ground and battery protection.
- How does the TPS653853A-Q1 support steering-angle monitoring?
The device has a steering-angle monitoring (SAM) unit with a rotation counter and low-power mode, allowing the ECU to capture the position of the steering wheel through motor-position sensors.
- What kind of diagnostic capabilities does the TPS653853A-Q1 offer?
The device features a dedicated diagnostic state for performing device self-tests and system diagnostics, along with error reporting through SPI registers and built-in self-test (BIST) capabilities.
- How can the TPS653853A-Q1 be woken up from a low-power state?
The device can be woken up through an ignition signal (IGN pin) or a wake-up signal from a CAN transceiver or other function (CAN_WU pin).
- What is the package type and pin count of the TPS653853A-Q1?
The device is available in a 48-pin HTSSOP (DCA) PowerPAD™ IC package.
