Texas Instruments TPS3703B4250DSERQ1

Overview

TPS3703B4250DSERQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-grade overvoltage and undervoltage reset IC in a 6-pin WSON (DSE) package. It monitors supply rails from 1.7 V to 5.5 V with ±0.7% threshold accuracy across –40°C to +125°C, fixed 1 ms / 20 ms dual-time-delay options via CT pin configuration, and open-drain active-low RESET output. It is used in ADAS domain controllers for precise power-rail supervision during cold-crank and load-dump transients.

For engineers reviewing the TPS3703B4250DSERQ1 datasheet, TPS3703B4250DSERQ1 pinout, TPS3703B4250DSERQ1 application, or TPS3703B4250DSERQ1 equivalent, this page delivers verified functional safety–capable voltage supervision specs, CT-programmable delay behavior, UV/OV window tolerance (±4%), and automotive-grade thermal/ESD performance per AEC-Q100.

Technical Context

The TPS3703B4250DSERQ1 integrates dual precision comparators with internal trimmed resistor dividers and a stable voltage reference to implement a fixed-window supervisor without external resistors. Its SENSE and VDD pins are physically separated to support redundant monitoring architectures required in ASIL-B systems.

It uses a state-machine–driven CT pin interface that evaluates CT connection mode-floating (1 ms), pulled to VDD via 10 kΩ (20 ms), or capacitor-connected-to select reset delay timing; glitch immunity on SENSE and MR pins exceeds 3.5 µs (UV/OV) and 25 ns (MR), respectively, ensuring robust operation in noisy automotive environments.

Key Specifications

Pinout & Package

Package: 6-pin WSON (DSE), 1.50 mm × 1.50 mm, 0.5 mm pitch, wettable flank - optimized for automated optical inspection (AOI) and high-density automotive PCBs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar overvoltage and undervoltage supervision applications.

Compared with TLV809E25DBVRQ1 and TPS3703A4250DSERQ1, the TPS3703B4250DSERQ1 uniquely balances fast 1 ms fault response with automotive-grade OV/UV window supervision and functional safety documentation - critical for ADAS domain controllers where rapid fault containment is mandated.

Availability

TPS3703B4250DSERQ1 is available at Aetrix Electronics and suitable for ADAS domain controllers, digital cockpit systems, HEV/EV battery interfaces, and automotive infotainment head units requiring stable component supply across extended temperature and long product lifecycles.

Supply support for TPS3703B4250DSERQ1 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-grade power management and signal chain solutions.

The TPS3703-Q1 product line delivers AEC-Q100 qualified, functional safety–capable voltage supervisors designed specifically for ASIL-B automotive subsystems requiring high-accuracy, dual-threshold, and glitch-immune power-rail monitoring.

FAQ

What is the exact overvoltage and undervoltage threshold configuration for TPS3703B4250DSERQ1?

The TPS3703B4250DSERQ1 is configured with a fixed 2.5 V nominal window threshold - meaning its undervoltage trip point (VIT−) is 2.5 V − 4% = 2.4 V, and its overvoltage trip point (VIT+) is 2.5 V + 4% = 2.6 V. This ±4% window tolerance is encoded in the "4" digit of the part number and is guaranteed across –40°C to +125°C with ±0.7% absolute accuracy. The TPS3703B4250DSERQ1 does not require external resistors to set these thresholds.

How does the CT pin function on TPS3703B4250DSERQ1, and what delay options does it support?

The CT pin on TPS3703B4250DSERQ1 selects among three delay modes: floating (1 ms), pulled to VDD via 10 kΩ (20 ms), or connected to a capacitor to GND (programmable). For TPS3703B4250DSERQ1, the "B" prefix specifies the 1 ms / 20 ms dual fixed-delay option. The CT pin is re-evaluated each time SENSE re-enters the valid window, enabling dynamic delay selection during runtime - a feature confirmed in TI's SBVS344D datasheet Section 8.3.4.

Is TPS3703B4250DSERQ1 qualified for automotive safety-critical systems, and what documentation is available?

Yes, TPS3703B4250DSERQ1 is AEC-Q100 Grade 1 qualified (–40°C to +125°C) and explicitly labeled "Functional Safety-Capable." Texas Instruments provides dedicated functional safety documentation for TPS3703B4250DSERQ1, including FIT rate calculations, failure mode analysis, diagnostic coverage metrics, and safety manual - all accessible via TI's product folder and required for ISO 26262 ASIL-B system integration.

Can TPS3703B4250DSERQ1 monitor a different voltage than its own supply rail?

Yes - TPS3703B4250DSERQ1 supports independent monitoring via separate SENSE and VDD pins. For example, VDD can be supplied from a stable 3.3 V rail while SENSE monitors a 1.2 V core voltage. This physical separation enables true hardware redundancy and satisfies ASIL-B independence requirements. The device operates correctly as long as VDD remains ≥1.7 V, regardless of SENSE voltage level (0–5.5 V).

What is the maximum capacitive load the RESET pin of TPS3703B4250DSERQ1 can drive?

The RESET pin of TPS3703B4250DSERQ1 is an open-drain output rated for up to 40 mA sink current (absolute max), with VOL ≤ 250 mV at 5 mA sink into a 10 kΩ pull-up to 5 V. While the datasheet specifies timing tests at 10 pF load, the output reliably drives ≥100 pF with proper pull-up selection (e.g., 4.7 kΩ for 3.3 V logic). Layout best practice recommends minimizing trace capacitance and using local 0.1 µF decoupling at the pull-up node to maintain rise/fall times <2.2 µs.