Texas Instruments TPS65941111RWERQ1

Overview

TPS65941111RWERQ1 from Texas Instruments is an automotive-grade power management IC (PMIC) integrating five buck regulators (four 3.5 A multi-phase configurable + one 2 A), four LDOs (three 500 mA bypass-capable + one 300 mA low-noise), real-time clock, 32-kHz crystal oscillator, and functional safety features compliant with ISO 26262 up to ASIL-D. It operates from 3 V to 5.5 V input across –40°C to +125°C ambient and supports synchronized switching at 2.2 MHz or 4.4 MHz for ADAS and digital cluster applications.

For engineers reviewing the TPS65941111RWERQ1 datasheet, TPS65941111RWERQ1 pinout, TPS65941111RWERQ1 application, or TPS65941111RWERQ1 equivalent, key selection considerations include ASIL-D hardware integrity, NVM-configurable power sequencing, dual I²C/SPI control interfaces, integrated watchdog with Q&A mode, and thermal/overvoltage/overcurrent monitoring on all rails.

Technical Context

The TPS65941111RWERQ1 implements a safety-critical power architecture with five independent switching regulators: BUCK1–BUCK4 support flexible multi-phase operation (up to 14 A aggregate), while BUCK5 delivers fixed 2 A output. All bucks feature internal soft-start, short-circuit protection, and selectable 2.2/4.4 MHz switching frequency with external clock synchronization capability.

Four LDOs provide auxiliary rail conditioning: LDO1–LDO3 (500 mA, 0.6–3.3 V, bypass mode enabled), and LDO4 (300 mA, 1.2–3.3 V, low-noise). Integrated safety mechanisms include CRC-protected NVM, dual error signal monitors (ESMs), thermal pre-warning/shutdown, and input/output voltage/current monitoring across all regulated outputs.

Key Specifications

Pinout & Package

TPS65941111RWERQ1 uses an 8-mm × 8-mm, 56-pin VQFNP package with 0.5-mm pitch and exposed thermal pad for enhanced thermal dissipation in automotive environments.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PMIC applications.

Compared with TPS65941111RWERQ1, TPS65942111RWERQ1 offers identical silicon and safety certification but targets alternate SoC platforms via factory-programmed NVM, whereas MAX20429ATJA/VY+ provides scaled-down functionality for less demanding applications without ASIL-D or RTC requirements.

Availability

TPS65941111RWERQ1 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS domain controllers, and telematics systems requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.

Supply support for TPS65941111RWERQ1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor company specializing in analog, embedded processing, and power management technologies with broad automotive qualification expertise.

The TPS6594-Q1 product line was designed specifically for safety-critical automotive applications including ADAS, digital clusters, and infotainment systems requiring ISO 26262 ASIL-D compliance and integrated power sequencing.

FAQ

What is the primary safety certification level supported by the TPS65941111RWERQ1?

The TPS65941111RWERQ1 is developed for functional safety applications and supports ISO 26262 system design up to ASIL-D, with documented hardware integrity, systematic capability, and diagnostic coverage. It also aids IEC 61508 system design up to SIL-3. These certifications are validated through TI's functional safety documentation package, which includes FMEDA reports and safety manuals - all applicable to the TPS65941111RWERQ1 device variant.

Does the TPS65941111RWERQ1 support multi-phase operation across its buck regulators?

Yes, the TPS65941111RWERQ1 supports flexible multi-phase capability for BUCK1–BUCK4, allowing up to 14 A aggregate output current from a single rail. Each of these four bucks delivers 3.5 A per phase, and phase interleaving is configurable via NVM or runtime register writes. BUCK5 operates independently at 2 A and does not participate in multi-phase configurations.

How does the TPS65941111RWERQ1 handle power sequencing for complex SoC boot sequences?

The TPS65941111RWERQ1 stores configurable power-up and power-down sequences in non-volatile memory (NVM), enabling deterministic, repeatable rail enablement order without host processor involvement. Digital inputs can trigger state transitions, and digital outputs (including GPIOs) can be embedded in sequences to control external regulators or enable signals - all verified at startup via CRC check on NVM contents.

What clock sources does the TPS65941111RWERQ1 provide for system timing?

The TPS65941111RWERQ1 integrates a 32-kHz crystal oscillator with buffered CLK32KOUT output for RTC and low-power timing, plus a 128-kHz RC oscillator for internal use. It also supports external clock synchronization via SYNCCLKIN and provides SYNCCLKOUT for driving other devices. The 20-MHz monitor oscillator and DPLL with spread-spectrum modulation further enhance EMC performance and timing flexibility.

Can the TPS65941111RWERQ1 operate with only a backup battery supply?

Yes, the TPS65941111RWERQ1 supports backup-only operation with 7 μA typical current draw, powering the 32-kHz oscillator and RTC module from VBACKUP (coin cell or supercap). In this mode, only RTC, crystal oscillator, and associated wakeup logic remain active - all bucks, LDOs, and digital interfaces are disabled until main supply resumes.