TPS6594-Q1 Automotive 2.8 V to 5.5 V, 5 buck & 4 LDO Power Management IC (PMIC) |

This product is prototype/experimental and has not been released to the market. Testing and final processes may not be complete. This product may be subject to further changes or possible discontinuation.
Automotive 2.8 V to 5.5 V, 5 buck & 4 LDO Power Management IC (PMIC)


Sample availability and other info

RWE package is in preview. Preproduction samples are available (PTPS659411F0RWERQ1 and PTPS659413F0RWERQ1).  Request now

Functional safety information is available.  Request now


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.


  • 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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Part number Order Regulated outputs (#) Processor name Vin (Min) (V) Vin (Max) (V) LDO Step-down DC/DC converter Iout (Max) (A) Features Shutdown current (Typ) (uA) Rating Operating temperature range (C) Configurability Package Group Package size: mm2:W x L (PKG) TI functional safety category
TPS6594-Q1 Order now 9     TDA4VM
2.8     5.5     4     5     14     Comm Control
I2C Control
SPI Control
Adaptive/Dynamic Voltage Scaling
Power Good
Power Sequencing
Soft Start Adjustable
Dynamic Voltage Scaling
Multiple Outputs
Output Discharge
Over Current Protection    
2     Automotive     -40 to 125     Factory programmable
Software configurable    
VQFNP | 56     56VQFNP: 64 mm2: 8 x 8 (VQFNP | 56)     Functional safety-compliant