Texas Instruments TPS3850G30QDRCRQ1

Overview

TPS3850G30QDRCRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified precision voltage supervisor with integrated programmable window watchdog timer. It monitors supply rails from 0.9 V to 5.0 V with ±0.8% threshold accuracy over –40°C to +125°C, delivers 10 µA typical supply current, and features factory-programmed or capacitor-adjustable reset (703 µs–3.22 s) and watchdog timeouts. It serves as a safety-critical system monitor in ADAS domain controllers.

For engineers reviewing the TPS3850G30QDRCRQ1 datasheet, TPS3850G30QDRCRQ1 pinout, TPS3850G30QDRCRQ1 application, or TPS3850G30QDRCRQ1 equivalent, key selection considerations include its 0.5% hysteresis, open-drain RESET/WDO outputs, 3-mm × 3-mm VSON-10 wettable-flank package, watchdog disable capability via SET pins, and dual-mode timing (factory-default or external capacitor).

Technical Context

The TPS3850G30QDRCRQ1 implements a dual-comparator window architecture on the SENSE pin with independent overvoltage (VIT+(OV)) and undervoltage (VIT−(UV)) thresholds, each trimmed to ±0.8% accuracy across temperature. Its internal precision clock drives both the reset timeout counter and the window watchdog state machine, enabling deterministic fault response timing.

Watchdog operation uses a configurable window ratio (1/8, 1/2, 3/4, or disabled) selected by SET0/SET1 logic inputs, with upper/lower boundaries set either by factory defaults or external CWD capacitor (0.1–1000 nF). The CRST pin similarly supports resistor- or capacitor-based reset delay programming, with tINIT = 381 µs for pin configuration evaluation.

Key Specifications

Pinout & Package

TPS3850G30QDRCRQ1 is housed in a 3.00-mm × 3.00-mm, 10-pin VSON package with exposed thermal pad connected internally to GND. Wettable flanks enable solder-joint quality verification.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage supervision and window watchdog applications.

Compared with TPS3850G30QDRCRQ1, TPS3851G30QDRCRQ1 adds NMI functionality without altering supervision accuracy or watchdog flexibility, while MAX6373KA29+T trades programmability and automotive qualification for lower cost and smaller feature set in non-safety contexts.

Availability

TPS3850G30QDRCRQ1 is available at Aetrix Electronics and suitable for automotive ADAS domain controllers, digital cockpit processing units, telematics control units, and on-board wireless chargers requiring stable component supply with full AEC-Q100 traceability.

Supply support for TPS3850G30QDRCRQ1 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 and embedded processing technologies, with leadership in automotive, industrial, and power management solutions.

The TPS3850-Q1 product line delivers AEC-Q100 qualified voltage supervisors with integrated window watchdogs for functional safety–critical automotive ECUs, targeting ADAS, digital cockpit, and vehicle connectivity systems.

FAQ

What is the operating temperature range of the TPS3850G30QDRCRQ1?

The TPS3850G30QDRCRQ1 is qualified per AEC-Q100 Grade 1 with an ambient operating temperature range of –40°C to +125°C. This rating applies to the full device functionality including voltage supervision accuracy, watchdog timing, and reset delay performance, making it suitable for under-hood and infotainment module deployments.

How does the TPS3850G30QDRCRQ1 implement window watchdog functionality?

The TPS3850G30QDRCRQ1 implements window watchdog functionality using a dual-boundary timing scheme: WDI must receive a falling edge between tWDL (lower boundary) and tWDU (upper boundary) to prevent WDO assertion. Boundaries are set by CWD capacitor value and SET0/SET1 logic states, supporting ratios of 1/8, 1/2, or 3/4 - or full disable.

Can the reset delay of the TPS3850G30QDRCRQ1 be adjusted externally?

Yes, the reset delay of the TPS3850G30QDRCRQ1 is adjustable via the CRST pin: connecting a capacitor (0.1–1000 nF) between CRST and GND sets tRST from 703 µs to 3.22 s; a 10-kΩ pullup to VDD selects factory-default 10-ms delay; leaving CRST unconnected selects alternate factory defaults (170–230 ms).

What package type and dimensions does the TPS3850G30QDRCRQ1 use?

The TPS3850G30QDRCRQ1 uses a 3.00-mm × 3.00-mm, 10-pin VSON package (DRC) with wettable flanks. The thermal pad is internally connected to GND and must be soldered to a large-area ground plane. This package supports automated optical inspection and meets IPC-7351B standards for automotive PCB assembly.

Does the TPS3850G30QDRCRQ1 support functional safety certification?

Yes, the TPS3850G30QDRCRQ1 is functional safety-capable: Texas Instruments provides a safety manual, FIT rate data, and failure mode analysis documentation to support ISO 26262 ASIL-B system-level development. It is not ASIL-B certified out-of-box but provides the necessary evidence for integration into ASIL-B architectures.