1 Features

• 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

• Functional Safety-Compliant

– Developed for functional safety applications

– Documentation available to aid ISO 26262

system design up to ASIL-D

– Documentation available to aid IEC 61508

system design up to SIL-3

– Systematic capability up to ASIL-D

– Hardware integrity up to ASIL-D

– Input supply voltage monitor and over-voltage

protection

– Under/overvoltage monitors and over-current

monitors on all output supply rails

– Watchdog with selectable trigger / Q&A mode

– Two error signal monitors (ESMs) with

selectable level / PWM mode

– Thermal monitoring with high temperature

warning and thermal shutdown

– Bit-integrity (CRC) error detection on internal

configuration registers and non-volatile memory

(NVM)

• 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 voltage range in 5, 10, or

20-mV steps

– One with 4 A, three with 3.5 A, and one with 2

A output current capability

– Flexible multi-phase capability for four BUCKs:

up to 14 A output current from a single rail

– Short-circuit 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 voltage range with 50-mV

steps in linear regulation mode

– 1.7 V to 3.3 V output voltage range in bypass

mode

– 500 mA output current capability with shortcircuit

and over-current protection

• One low-dropout (LDO) linear regulator with lownoise

performance

– 1.2 V to 3.3 V output voltage range in 25-mV

steps

– 300 mA output current capability with shortcircuit

and over-current protection

• Configurable power sequence control in nonvolatile

memory (NVM):

– Configurable power-up and power-down

sequences between power states

– Digital output signals can be included in the

power sequences

– Digital input signals can be used to trigger

power sequence transitions

– Configurable handling of safety-relevant errors

• 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

2 Applications

• Automotive infotainment and digital cluster,

navigation systems, telematics, body electronics

and lighting

• Advanced driver assistance system (ADAS)

• Industrial control and automation

3 Description

The TPS6594-Q1 device provides four flexible multiphase

configurable BUCK regulators with 3.5 A output

current per phase, and one additional BUCK regulator

with 2 A output current.

All of the BUCK regulators 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 the EMC performance, an integrated spread-spectrum modulation can be

added to the synchronized BUCK switching clock signal. This clock signal 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, stored in the register map of the device, can be changed from the

default through SPI or I2C interfaces to configure the device to meet many different system needs. The NVM

contains a bit-integrity-error detection feature (CRC) 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 real-time

clock (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 voltage monitoring on the

input supply, input over-voltage protection, voltage monitoring on all BUCK and LDO regulator outputs, register

and interface CRC, current-limit, short-circuit protection, thermal pre-warning, and over-temperature shutdown.

The device also includes a Q&A or trigger mode watchdog to monitor for MCU software lockup, and two error

signal monitor (ESM) 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 MCU

to take action in response.