Texas Instruments TPS6594-Q1 Power Management IC (PMIC)
Texas Instruments TPS6594-Q1 Power Management IC (PMIC) provides four flexible multi-phase configurable step-down converters with 3.5A per phase and one additional step-down converter with 2A capability. All of the bucks can be synchronized to an internal 2.2MHz or 4.4MHz or an external 1MHz, 2MHz, or 4MHz 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 500mA capability, which can be configured as load switches; one with 300mA 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 Texas Instruments TPS6594-Q1 includes a 32kHz crystal oscillator, which generates an accurate 32kHz clock for the integrated RTC module. 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 two 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.
Features
- Qualified for automotive applications
- AEC-Q100 qualified with the following results
- The device operates from 3V to 5.5V input supply
- –40°C to +125°C ambient operating temperature grade 1
- 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 a 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
- 2µA typical shutdown current
- 7µA typical in backup supply only mode
- 20µA typical in low power standby mode
- Five step-down switched-mode power supply (BUCK) regulators
- 0.3V to 3.34V output range in 5, 10, or 20mV steps
- One with 4A, three with 3.5A, and one with 2A capability
- Four of the Bucks with flexible multi-phase capability which can source up to 14A from a single rail
- Short-circuit protection and over-current protection
- Internal soft-start for in-rush current limitation
- 2.2MHz / 4.4MHz switching frequency
- Ability to synchronize to an external clock input
- Three low-dropout (LDO) linear regulators with configurable bypass mode
- 0.6V to 3.3V output range with 50mV steps in linear regulation mode
- 1.7V to 3.3V output range in bypass mode
- 500mA capability with short-circuit and over-current protection
- One low-dropout (LDO) linear regulator with low-noise performance
- 1.2V to 3.3V output range in 25mV steps
- 300mA 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 sequence transitions
- 32kHz crystal oscillator with an option to output a buffered 32kHz clock output
- Real-Time Clock (RTC) with alarm and periodic wakeup mechanism
- One SPI or Two I2C control interfaces, with a second I2C interface dedicated for Q&A watchdog communication
- Package option
- 8mm × 8mm 56-pin VQFNP with 0.5mm pitch
Applications
- Automotive infotainment and digital cluster
- Automotive Advanced Driver Assistance System (ADAS)
- Automotive navigation systems
- Automotive telematics
- Automotive body electronics & lighting
Functional Block Diagram
Related Development Tool
Texas Instruments TPS6594xEVM PMIC Evaluation Modules (EVMs)
Used to demo, debug, test, and configure one or more of the TPS6594x power management ICs.