Overview
The TPS653853-Q1, produced by Texas Instruments, is a multirail power supply designed specifically for microcontrollers in safety-relevant applications, particularly in the automotive and industrial sectors. This device supports microcontrollers with dual-core lockstep (LS) or loosely coupled architectures (LC) and is engineered to meet stringent safety and reliability standards.
It integrates multiple supply rails to power the MCU, CAN or FlexRay, and external sensors, ensuring comprehensive power management and monitoring. The device features a buck-boost converter with internal FETs, an integrated charge pump, and various protection mechanisms to ensure reliable operation under diverse conditions.
Key Specifications
| Specification | Details |
|---|---|
| Input Voltage Range | 7 to 36 V for initial battery power up, 3.8 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, 284-mA LDO (CAN), 3.3-V or 5-V, 350-mA LDO (MCU), 2 LDOs for sensor supply or peripherals |
| Sensor Supply | 120 mA for Sensor Supply 1 (VSOUT1), 20 mA for Sensor Supply 2 (VSOUT2) |
| Temperature Range | –40°C to +125°C Ambient Operating Temperature |
| ESD Classification | Device HBM ESD Classification Level 2, Device CDM ESD Classification Level C4B |
| Package | 48-Pin HTSSOP PowerPAD™ IC Package |
| Functional Safety Compliance | Developed for Functional Safety Applications, Documentation Available to Aid ISO 26262 System Design up to ASIL D |
Key Features
- Qualified for Automotive Applications and AEC-Q100 Qualified
- Functional Safety-Compliant with documentation to aid ISO 26262 system design up to ASIL D
- Integrated buck-boost converter with internal FETs and charge pump for overdrive voltage and reverse battery protection
- Independent undervoltage and overvoltage monitoring on all regulator outputs, battery voltage, and internal supplies
- Voltage monitoring circuitry with independent bandgap reference and self-check on all voltage monitoring
- Current limit and overtemperature prewarning and shutdown protection
- Steering-Angle Monitoring (SAM) unit with low-power mode and position sensor signal switches
- Microcontroller Interface with watchdog, MCU error-signal monitor, clock monitoring, and diagnostic output pin
- SPI with CRC on command plus data and error reporting through SPI registers
- Wake-up through IGN pin (ignition) or CAN_WU pin (transceiver or other function)
- Reset circuit for MCU and safing output to disable external power-stages on detected system failure
Applications
- Automotive Safety-Relevant Applications
- Industrial Safety-Relevant Applications
The TPS653853-Q1 is particularly suited for use in safety-critical systems within the automotive industry, such as steering control units, and in industrial applications where high reliability and safety compliance are essential.
Q & A
- What is the primary function of the TPS653853-Q1 device?
The TPS653853-Q1 is a multirail power supply designed to power microcontrollers in safety-relevant applications.
- What is the input voltage range for the TPS653853-Q1?
The input voltage range is 7 to 36 V for initial battery power up, 3.8 to 36 V for full functionality after initial power up, and a minimum of 2.3 V during operation after wake-up.
- What types of supply rails does the TPS653853-Q1 provide?
The device provides a 6-V synchronous buck-boost preregulator, a 5-V, 284-mA LDO for CAN, a 3.3-V or 5-V, 350-mA LDO for MCU, and two LDOs for sensor supply or peripherals.
- Is the TPS653853-Q1 compliant with automotive safety standards?
Yes, it is qualified for automotive applications and AEC-Q100 qualified, with documentation available to aid ISO 26262 system design up to ASIL D.
- What protection mechanisms are built into the TPS653853-Q1?
The device includes independent undervoltage and overvoltage monitoring, current limits, overtemperature prewarning and shutdown, and a charge pump for reverse battery protection.
- How does the TPS653853-Q1 support steering-angle monitoring?
The device features a Steering-Angle Monitoring (SAM) unit with low-power mode, position sensor signal switches, and rotation counter.
- What communication interfaces does the TPS653853-Q1 support?
The device supports SPI with CRC on command plus data and error reporting through SPI registers.
- How can the TPS653853-Q1 be woken up from a low-power state?
The device can be woken up through the IGN pin (ignition) or the CAN_WU pin (transceiver or other function).
- What package type is the TPS653853-Q1 available in?
The device is available in a 48-Pin HTSSOP PowerPAD™ IC package.
- Does the TPS653853-Q1 have built-in self-test capabilities?
Yes, the device automatically runs a built-in self-test (BIST) at start-up, and the MCU can re-run the BIST during system runtime through software control.
- How does the TPS653853-Q1 ensure system safety upon detecting errors?
The device features a safing output (ENDRV pin) to disable external power-stages on any detected system failure and maintains the system in a safe state until the error is resolved.
