Texas Instruments O917A14DTRGZRQ1

Overview

TPS65917A14DTRGZRQ1 from Texas Instruments is an AEC-Q100 Grade 2 automotive power management unit (PMU) integrating five step-down SMPS regulators (including dual-phase 7-A capability), five LDOs, a 12-bit sigma-delta GPADC, thermal monitoring, and configurable power sequencing. It operates from 3.135 V to 5.25 V input and supports dynamic voltage scaling for processor core, memory, and I/O domains in digital cluster and ADAS systems.

For engineers reviewing the TPS65917A14DTRGZRQ1 datasheet, TPS65917A14DTRGZRQ1 pinout, TPS65917A14DTRGZRQ1 application, or TPS65917A14DTRGZRQ1 equivalent, key selection criteria include dual-phase SMPS current capability (3.5 A × 2), OTP-configurable power-up sequences, differential remote sensing on SMPS1/2, integrated 32-kHz RC oscillator, and automotive-grade thermal shutdown at +125°C.

Technical Context

The TPS65917A14DTRGZRQ1 implements a hierarchical power architecture with one-time programmable (OTP) memory controlling startup sequences, voltage defaults, and GPIO configurations - enabling zero-software boot. Its five SMPS regulators use synchronous buck topology with internal 2.2-MHz clock or external synchronization via GPIO_3 (SYNCDCDC), supporting system-level EMC optimization across multiple PMUs.

Control is split between two I²C interfaces (one dedicated to DVS) and one SPI interface, while the 12-bit GPADC monitors eight channels - including two external inputs, supply voltages, output currents, and die temperature - feeding real-time health data to the host processor via interrupt-driven event handling.

Key Specifications

Pinout & Package

TPS65917A14DTRGZRQ1 uses a 7-mm × 7-mm, 48-pin VQFN package (RGZ) with 0.5-mm pitch and exposed thermal pad (PGND). Pin functions are validated per TI SLVSCO4D Rev D datasheet, Section 3.1–3.2.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS65917A14DTRGZRQ1, the TPS65917A14DTRGZTQ1 offers identical performance in tape-and-reel format for high-volume lines, while the TPS65917A14DTRGZQ1 omits formal AEC-Q100 certification documentation - making it unsuitable for ASIL-B systems despite matching electrical behavior.

Availability

TPS65917A14DTRGZRQ1 is available at Aetrix Electronics and suitable for automotive digital cluster, ADAS camera modules, and infotainment head units requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant traceability.

Supply support for TPS65917A14DTRGZRQ1 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 leader specializing in analog, embedded processing, and automotive ICs, with decades of expertise in power management innovation.

The TPS65917 product line delivers highly integrated, AEC-Q100-qualified PMUs for automotive processors - designed to reduce board space, simplify thermal design, and eliminate discrete sequencing logic in digital clusters and ADAS systems.

FAQ

What is the maximum supported switching frequency for external synchronization of TPS65917A14DTRGZRQ1 SMPS regulators?

The TPS65917A14DTRGZRQ1 supports external clock synchronization via the GPIO_3 (SYNCDCDC) pin across a range of 1.7 MHz to 2.7 MHz. This allows precise phase alignment between multiple PMUs in a system to minimize conducted EMI peaks. The internal default switching frequency is fixed at 2.2 MHz, and the external clock must be stable and jitter-controlled to maintain regulation accuracy. TPS65917A14DTRGZRQ1 does not support frequencies outside this band - attempting to drive SYNCDCDC beyond 2.7 MHz may cause undefined regulator behavior.

Does TPS65917A14DTRGZRQ1 support dynamic voltage scaling (DVS) for all five SMPS regulators?

TPS65917A14DTRGZRQ1 supports hardware- and software-controlled DVS only on the two 3.5-A SMPS regulators (SMPS1 and SMPS2), which are typically assigned to processor core and GPU domains. SMPS3 (3-A), SMPS4 (2-A), and SMPS5 (1.5-A) operate at fixed OTP-programmed or I²C/SPI-configured voltages without real-time DVS capability. DVS commands are issued via the dedicated DVS I²C interface (I²C2), and voltage transitions follow slew-rate-limited ramps defined in register settings. TPS65917A14DTRGZRQ1's DVS implementation includes output current measurement for adaptive scaling decisions.

How is thermal shutdown implemented in TPS65917A14DTRGZRQ1, and what is the trip threshold?

TPS65917A14DTRGZRQ1 integrates a die-temperature sensor feeding into a thermal monitor block that triggers automatic shutdown at +125°C. This threshold is factory-trimmed and non-adjustable. Upon detection, all SMPS and LDO outputs are disabled within 10 µs, and the device enters OFF state while maintaining RESET_OUT assertion. Recovery requires either a full power cycle or deassertion of PWRON followed by valid power-good conditions. The GPADC also provides continuous die temperature readback (via ADCINx channels) for predictive thermal management - but this does not replace the hard shutdown function. TPS65917A14DTRGZRQ1 reports thermal events via the INT pin and corresponding status register bits.

Can TPS65917A14DTRGZRQ1 operate without external I²C or SPI communication after initial configuration?

Yes - TPS65917A14DTRGZRQ1 is designed for autonomous operation using factory-programmed OTP memory. All power-up sequences, output voltages, GPIO configurations, and default states are stored in OTP and executed without host intervention. SPI and I²C interfaces are optional for runtime reconfiguration (e.g., DVS updates, fault clearing, ADC channel selection) but not required for basic functionality. The device boots fully functional upon power application, with RESET_OUT released only after all POWERGOOD conditions are met. TPS65917A14DTRGZRQ1 retains this behavior even if I²C/SPI lines are left unconnected or held inactive.

What are the voltage monitoring capabilities of the 12-bit GPADC in TPS65917A14DTRGZRQ1?

The 12-bit sigma-delta GPADC in TPS65917A14DTRGZRQ1 monitors eight channels: two external (ADCIN1, ADCIN2), plus internal measurements of VCCA, VIO_IN, SMPS output currents (via sense resistors), LDO outputs, and die temperature. It supports automatic conversion sequences triggered by timer or event, with results stored in dedicated registers accessible via I²C/SPI. Full-scale range is 0–1.23 V referenced to VBG, and external inputs require scaling resistors for >1.23 V signals. Conversion accuracy is ±1.5 LSB INL, and sampling rate is up to 1 kSPS. TPS65917A14DTRGZRQ1 uses GPADC data for real-time health monitoring - e.g., detecting VSYS brownout or LDO overcurrent - but does not support closed-loop regulation.