Texas Instruments TPS3702AX18QDDCRQ1

Overview

TPS3702AX18QDDCRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive window voltage detector that monitors supply rails from 1V to 5V with ±0.9% threshold accuracy over –40°C to 125°C, 7µA typical quiescent current, and dual open-drain UV/OV outputs. It enables fail-safe power monitoring in safety-critical ADAS sensors and infotainment domain controllers.

For engineers reviewing the TPS3702AX18QDDCRQ1 datasheet, TPS3702AX18QDDCRQ1 pinout, TPS3702AX18QDDCRQ1 application, or TPS3702AX18QDDCRQ1 equivalent, key selection criteria include its fixed ±1.8% nominal window (configurable via SET pin), internal resistor divider eliminating external components, SOT-6 package with separate SENSE/VDD pins for redundancy, and glitch-immune operation under automotive transients.

Technical Context

The TPS3702AX18QDDCRQ1 integrates two precision comparators and a trimmed reference to implement a window detection function without external resistors. Its dual open-drain outputs (UV and OV) operate independently and support pull-up voltages up to 18V, decoupled from VDD (2V–18V).

Threshold hysteresis is fixed at 0.55% of the trip point, and the SET pin selects between two factory-trimmed accuracy bands - here, the "X18" suffix denotes ±1.8% nominal thresholds. The device asserts active-low signals when SENSE falls below VIT–(UV) or rises above VIT+(OV), with propagation delays as low as 19µs (high-to-low) and 35µs (low-to-high).

Key Specifications

Pinout & Package

SOT-6 (DDC) package, 2.90mm × 1.60mm body size, surface-mount, lead-free and RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar window voltage detection applications.

Compared with TPS3702AX18QDDCRQ1, the TPS3702CX18QDDCRQ1 offers identical performance and drop-in compatibility, while the TLV809E33DBVRQ1 provides lower IQ but sacrifices overvoltage detection, window operation, and design flexibility - making it unsuitable as a functional replacement.

Availability

TPS3702AX18QDDCRQ1 is available at Aetrix Electronics and suitable for automotive radar systems, front/rear-view camera modules, and infotainment domain controllers requiring stable component supply across extended temperature and long production lifecycles.

Supply support for TPS3702AX18QDDCRQ1 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 focused on analog and embedded processing technologies, with leadership in automotive, industrial, and power management solutions.

The TPS3702-Q1 product line delivers high-accuracy, AEC-Q100 qualified window voltage detectors for functional safety-critical automotive subsystems - designed specifically to replace discrete comparator+reference+resistor solutions in ADAS, body electronics, and infotainment.

FAQ

What is the nominal voltage window configured for TPS3702AX18QDDCRQ1?

The "X18" suffix in TPS3702AX18QDDCRQ1 indicates a factory-trimmed ±1.8% nominal window around the monitored rail (e.g., 1.8V ±1.8% = 1.768V to 1.832V). This is selected by driving the SET pin ≥750mV. Threshold accuracy remains ±0.9% over –40°C to 125°C, resulting in worst-case bounds of ±2.7% total deviation.

Does TPS3702AX18QDDCRQ1 require external resistors to set thresholds?

No. TPS3702AX18QDDCRQ1 integrates precision trimmed resistors and a reference to set both overvoltage and undervoltage thresholds internally. This eliminates external resistor networks, removes their tolerance contribution to overall accuracy, and reduces PCB area and BOM cost - a key differentiator versus discrete or older-generation supervisors.

Can TPS3702AX18QDDCRQ1 monitor a supply rail higher than its VDD voltage?

Yes. The SENSE pin accepts up to 6.5V regardless of VDD (2V–18V), enabling monitoring of rails like 5V or 3.3V while powering the device from a lower 2.5V or 3.3V supply. For rails >6.5V, an external resistor divider is required - but TPS3702AX18QDDCRQ1's 1.5µA SENSE input bias ensures minimal loading error if divider current exceeds 150µA.

How does the SET pin affect TPS3702AX18QDDCRQ1's operation?

The SET pin configures TPS3702AX18QDDCRQ1 between two factory-set accuracy bands: ≤250mV selects the wider band (±9% nominal), while ≥750mV selects the tighter ±1.8% nominal band. This allows dynamic adjustment - e.g., relaxing thresholds during cold-start voltage sag, then tightening once regulation stabilizes - without changing hardware.

Is TPS3702AX18QDDCRQ1 compatible with functional safety standards like ISO 26262?

Yes. TPS3702AX18QDDCRQ1 is AEC-Q100 Grade 1 qualified (–40°C to 125°C), features separate SENSE and VDD pins for redundancy, provides independent UV/OV outputs for diagnostic coverage, and includes internal glitch immunity - collectively supporting ASIL-B decomposition in safety mechanisms. TI provides FIT rate data and safety manuals for integration into ISO 26262 workflows.