TPS6594-Q1

• Qualified for Automotive Applications
• AEC-Q100 Qualified with the Following Results:
  • Device Operates from 3 V to 5.5 V Input Supply
  • Device Temperature Grade 1: –40°C to +125°C Ambient Operating Temperature Range
  • Device HBM Classification Level 2
  • Device CDM Classification Level C4A
• SafeTI Semiconductor Component
  • Designed for Functional Safety Applications
  • Documentation Available to Aid ISO 26262 System Design up to ASIL D
  • Systematic Capability and Hardware Integrity up to ASIL D
  • Input Supply Monitor and Over-Voltage Protection
  • Windowed Voltage and Over-Current Monitors
  • Integrated Q&A or Trigger Mode Watchdog 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 Typical Shutdown Current
  • 7 µA Typical in Back Up Supply Only Mode
  • 20 µA Typical in Low Power Standby Mode
• Five Step-Down Switched-Mode Power Supply (BUCK) Regulators:
  • 0.3 V to 3.34 V Output Range in 5, 10, or 20 mV Steps
  • One with 4 A, Three with 3.5 A, and One with 2 A Capability
  • Four of the Bucks with Flexible Multi-Phase Capability which can Source up to 14 A from a Single Rail
  • 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
  • 0.6 V to 3.3 V Output Range with 50 mV Steps in Linear Regulation Mode
  • 1.7 V to 3.3 V Output Range in Bypass Mode
  • 500 mA Capability With Short-Circuit and Over-Current Protection
• One Low-Dropout (LDO) Linear Regulator with Low-Noise Performance
  • 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 between Power States (NVM)
  • Digital Output Signals can be Included in the Power Sequences
  • Digital Input Signals can be used to trigger Power Seqence Transitions
• 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 Watchdog Communication
• Package Option:
  • 8-mm × 8-mm 56-pin VQFNP With 0.5-mm Pitch

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The TPS6594-Q1 device provides four flexible multi-phase configurable step-down converters with 3.5 A per phase, and one additional step-down converter 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. An integrated spread-spectrum modulation can be added to the synchronized buck switching clock signal to improve the device’s EMC performance, 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 and default configurations, such as output voltage and GPIO configurations. The NVM is pre-programmed to allow start-up without external programming. Most static configurations 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 an 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 protection and diagnostic mechanisms such as register and interface CRC, short-circuit protection, thermal monitoring, and shutdown. The device also includes a Q&A or trigger mode 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 TPS6594-Q1 can notify the processor of these events through the interrupt handler, allowing the processor to take action in response.