TPS6594-Q1

• Qualified for automotive applications
• AEC-Q100 qualified with the following results:
  • Device temperature grade 1: –40°C to +125°C ambient operating temperature range
  • Device HBM classification level 2
  • Device CDM classification level C4A
• SafeTIsemiconductor component
  • Designed for function safety applications
  • Developed according to the requirements of ISO 26262
  • Supports ASIL-D systems (SEooC)
  • Input supply monitor and over-voltage protection
  • Windowed voltage and over-current monitors
  • Integrated Q&A or trigger mode watch dog module
  • Dual channel level or PWM Error Signal Monitoring (ESM) supporting processors with integrated safety-MCU
  • Thermal Monitoring With High Temperature Warning and Thermal Shutdown
  • NVM Bit-integrity error detection with options to proceed or hold power-up sequence and reset release
• Low-power consumption
  • 2 µA Typ. shutdown current
  • 7 µA Typ. in back up supply only mode
  • 20 µA Typ. in low power standby mode
• Five Step-Down Switched-Mode Power Supply (BUCK) regulators:
  • 2.8 V to 5.5 V Input Range
  • 0.3 V to 3.34 V Output Range in 5, 10, or 20 mV steps
  • Four BUCK regulators With 3.5 A capability, flexible multi-phase and source Up To 14 A from a single rail. One of the BUCK with 4 A capability in single-phase
  • One BUCK regulator with 2 A capability
  • Short-circuit protection and over-current protection
  • Internal soft-start for in-rush current limitation
  • 2.2 MHz / 4.4 MHz switching frequency
  • Ability to synchronize to external clock input
• Three Low-Dropout (LDO) linear regulators with configurable bypass mode
  • 1.2 V to 5.5 V input range in LDO mode
  • 1.7 V to 3.6 V input range in bypass mode
  • 0.6 V to 3.3 V output range in 50 mV steps
  • 500 mA capability with short-circuit and over-current protection
• One Low-Dropout (LDO) linear regulator with low-noise performance
  • 2.2 V to 5.5 V input range
  • 1.2 V to 3.3 V output range in 25 mV steps
  • 300 mA capability with short-circuit and over-current protection
• Power sequence control:
  • Configurable power-up and power-down sequences (NVM)
  • Configurable sequences between the SLEEP and ACTIVE state transition (NVM)
  • Digital output signals which can be included in the startup sequence
• 32 kHz crystal oscillator with option to output a buffered 32-kHz clock output
• Real-Time Clock (RTC) With alarm and periodic wake-up mechanism
• One SPI or Two I²C control interfaces, with second I²C interface dedicated for Q&A watch dog communication
• Package Option:
  • 8-mm × 8-mm 56-pin VQFNP With 0.5-mm Pitch

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The TPS6594-Q1 is an integrated power-management device for automotive and industrial applications. The device provides four flexible multi-phase configurable step-down converters with 3.5 A per phase, and one additional step-down converted with 2 A capability. All of the bucks can be synchronized to an internal 2.2 MHz or 4.4 MHz or an external 1 MHz, 2 MHz, or 4 MHz clock signal. To improve EMC performance of the device, an integrated spread-spectrum modulation can be added to the synchronized buck switching clock signal, which can also be made available to external devices through a GPIO output pin. The device provides four LDOs; three with 500 mA capability which can be configured as load switches, one with 300 mA capability and low-noise performance.

Non-volatile memory (NVM) is used to control the default power sequences, as well as default configurations such as output voltage and GPIO configurations. The NVM is factory-programmed to allow start-up without external programming. Most static settings can be changed from the default through SPI or I²C registers to configure the device to meet many different system needs. As a safety feature, the NVM contains a bit-integrity-error detection feature to stop the power-up sequence if an error is detected, preventing the system from starting in an unknown state.

The TPS6594-Q1 includes a 32 kHz crystal oscillator, which generates the accurate 32 kHz clock for the integrated RTC module. A backup-battery management provides power to the crystal oscillator and the RTC module from a coin cell battery or a super-cap in the event of power loss from the main supply.

The TPS6594-Q1 device includes a Q&A watchdog to monitor for software lockup, and 2 system error monitoring inputs with fault injection options to monitor the error signals from the attached SoC or MCU. The device also includes protection and diagnostic mechanisms such as short-circuit protection, thermal monitoring and shutdown. The PMIC can notify the processor of these events through the interrupt handler, allowing the processor to take action in response.