Texas Instruments TPS3702CX18QDDCRQ1

Overview

TPS3702CX18QDDCRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive window voltage detector IC that monitors supply rails from 1V to 5V with ±0.9% threshold accuracy over –40°C to 125°C, 0.55% internal hysteresis, and dual open-drain OV/UV outputs-used in safety-critical power supervision for ADAS cameras and radar systems.

For engineers reviewing the TPS3702CX18QDDCRQ1 datasheet, TPS3702CX18QDDCRQ1 pinout, TPS3702CX18QDDCRQ1 application, or TPS3702CX18QDDCRQ1 equivalent, key selection criteria include its fixed ±18% nominal window (for 1.8V rail), SET-pin configurable accuracy band, 7µA quiescent current, SOT-6 package footprint, and independent OV/UV fault signaling capability.

Technical Context

The TPS3702CX18QDDCRQ1 integrates two precision comparators and a trimmed internal resistor divider to implement a fixed-window detection function without external components. Its SENSE input accepts up to 6.5V independent of VDD (2–18V), enabling monitoring of rails higher than the device supply.

It operates in three functional modes: normal operation above UVLO (1.7V), undervoltage lockout between V(POR) and UVLO, and undefined state below V(POR) (0.8V). Threshold hysteresis (0.55%) prevents chatter during marginal voltage transitions, and internal glitch immunity suppresses transients ≤100ns.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3702CX18QDDCRQ1, the TPS3702CX12QDDCRQ1 shares identical architecture but targets a different nominal rail, while TLV809EYZR offers lower integration and reduced functional scope-making neither a direct replacement but viable alternatives in constrained or single-fault scenarios.

Availability

TPS3702CX18QDDCRQ1 is available at Aetrix Electronics and suitable for automotive radar systems, front/rear camera modules, and FPGA-based domain controllers requiring stable component supply with AEC-Q100 compliance and long-term production support.

Supply support for TPS3702CX18QDDCRQ1 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 TPS3702-Q1 product line delivers high-accuracy, AEC-Q100 qualified window voltage detectors for safety-critical automotive subsystems where precise rail supervision directly impacts functional safety compliance.

FAQ

What is the nominal monitored rail voltage for TPS3702CX18QDDCRQ1?

The TPS3702CX18QDDCRQ1 is factory-configured for a nominal 1.8V rail with a fixed ±18% window (1.476V to 2.124V). This matches common FPGA core, DSP I/O, and camera sensor supply voltages. The SET pin allows selection between this tight band and a wider alternative, but the part number suffix "CX18" explicitly denotes the 1.8V-optimized variant. TPS3702CX18QDDCRQ1 does not support reconfiguration to other nominal rails like 1.2V or 3.3V.

Does TPS3702CX18QDDCRQ1 require external resistors to set thresholds?

No, TPS3702CX18QDDCRQ1 does not require external resistors to set overvoltage or undervoltage thresholds. It integrates a precision trimmed resistor divider and reference, enabling accurate window detection without external components. This eliminates resistor tolerance errors, reduces PCB area, and improves overall system accuracy-key advantages confirmed in the device's electrical characteristics table and functional block diagram. TPS3702CX18QDDCRQ1 achieves ±0.9% threshold accuracy over temperature solely using internal elements.

How does the SET pin affect TPS3702CX18QDDCRQ1 operation?

The SET pin on TPS3702CX18QDDCRQ1 selects between two accuracy bands: applying ≥750mV configures the ±18% window for 1.8V nominal rail, while ≤250mV selects a wider band. This enables dynamic adjustment-for example, relaxing the window during power-up to avoid false trips from initial rail overshoot, then tightening it after stabilization. The SET pin draws only 600nA, minimizing impact on control logic. TPS3702CX18QDDCRQ1 behavior is fully defined in Table 6-1 and Section 6.3.3 of its datasheet.

Can TPS3702CX18QDDCRQ1 monitor a rail higher than its VDD supply?

Yes, TPS3702CX18QDDCRQ1 can monitor a rail up to 6.5V on the SENSE pin while powered from a lower VDD (minimum 2V). This is enabled by its internally isolated input structure and rail-to-rail input stage. For example, it can supervise a 5V camera sensor rail using a 3.3V VDD supply. The SENSE pin's 1.5µA input current and 6.5V absolute maximum rating ensure safe, accurate operation-confirmed in Sections 5.3 and 6.3.1 of the official datasheet for TPS3702CX18QDDCRQ1.

What is the purpose of separate OV and UV outputs in TPS3702CX18QDDCRQ1?

The separate OV and UV open-drain outputs in TPS3702CX18QDDCRQ1 enable differentiated system responses: OV can trigger immediate power-down of sensitive analog sections, while UV initiates controlled software recovery or brown-out interrupt handling. They may be tied together via wired-OR for single-reset logic, or kept independent to meet ASIL-B diagnostic requirements in ISO 26262 systems. Each output sinks up to 10mA and supports pull-up voltages up to 18V-providing flexibility unmatched by single-output supervisors. This dual-output architecture is intrinsic to TPS3702CX18QDDCRQ1's functional safety design.