Texas Instruments TPS3703A7180DSERQ1

Overview

TPS3703A7180DSERQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive overvoltage/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, 7 µA max quiescent current, and fixed 1.8 V window threshold (±5% tolerance). It delivers reliable power-on reset and fault detection for safety-critical ADAS domain controllers.

For engineers reviewing the TPS3703A7180DSERQ1 datasheet, TPS3703A7180DSERQ1 pinout, TPS3703A7180DSERQ1 application, or TPS3703A7180DSERQ1 equivalent, this page provides verified functional context, validated timing behavior, confirmed automotive qualification evidence, and real-world design implications for voltage supervision in HEV/EV and digital cockpit systems.

Technical Context

The TPS3703A7180DSERQ1 integrates dual precision comparators with a trimmed internal resistor divider and reference to implement fixed 1.8 V window supervision - VIT+(OV) = 1.8 V + 5% and VIT–(UV) = 1.8 V – 5%. Its CT pin supports two factory-set delay modes (CT open = 10 ms, CT tied to VDD = 200 ms) and programmable delay via external capacitor.

It features latched RESET output with open-drain active-low assertion, manual reset (MR) input with 0.3 V logic-low threshold, and built-in glitch immunity (3.5 µs for SENSE, 25 ns for MR). The separate SENSE and VDD pins enable redundant monitoring architecture required by ISO 26262-compliant safety systems.

Key Specifications

Pinout & Package

TPS3703A7180DSERQ1 uses a 1.50 mm × 1.50 mm, 6-pin WSON (DSE) package with wettable flanks for automated optical inspection. Thermal resistance R_θJA = 184.2°C/W enables operation at full temperature range without heatsinking in compact PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3703A7180DSERQ1, the TPS3703A5180DSERQ1 offers improved threshold tolerance for tighter-margin designs, while TLV809E18DBZRQ1 sacrifices window functionality for lower cost and simpler implementation - neither provides full functional equivalence without architectural changes.

Availability

TPS3703A7180DSERQ1 is available at Aetrix Electronics and suitable for ADAS domain controllers, digital cockpit SoCs, and HEV/EV battery management units requiring stable component supply with automotive-grade traceability and long-term lifecycle support.

Supply support for TPS3703A7180DSERQ1 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 and embedded processing technologies, with deep expertise in automotive-grade reliability and functional safety design.

The TPS3703-Q1 product line delivers highly accurate, integrated voltage supervisors optimized for ISO 26262-compliant automotive systems - emphasizing redundancy, latch behavior, and AEC-Q100 Grade 1 operation in harsh thermal environments.

FAQ

What is the exact window threshold configuration of TPS3703A7180DSERQ1?

The TPS3703A7180DSERQ1 is configured for a fixed 1.8 V window threshold with ±5% tolerance: VIT+(OV) = 1.89 V and VIT–(UV) = 1.71 V at 25°C, maintaining ±0.7% accuracy across –40°C to +125°C. This matches common 1.8 V digital supply rails and requires no external resistor network - all threshold-setting elements are internal and factory-trimmed.

How does the CT pin operate in TPS3703A7180DSERQ1?

In TPS3703A7180DSERQ1, the CT pin selects between two factory-programmed reset delays: 10 ms when left floating, and 200 ms when tied to VDD via a 10 kΩ resistor. The device re-evaluates CT pin state each time SENSE re-enters the valid window, with a 450 µs internal detection window. No external capacitor is required for these fixed delays.

Is TPS3703A7180DSERQ1 qualified for automotive safety applications?

Yes, TPS3703A7180DSERQ1 is AEC-Q100 Grade 1 qualified (–40°C to +125°C ambient), HBM ±2000 V and CDM ±500 V ESD rated, and explicitly documented as functional safety-capable with supporting safety analysis reports available from TI. Its latched RESET, redundant SENSE/VDD pins, and glitch-immune MR meet ASIL-B diagnostic coverage requirements.

Can TPS3703A7180DSERQ1 monitor its own VDD supply?

Yes - TPS3703A7180DSERQ1 supports VDD monitoring by connecting the SENSE pin directly to the VDD pin. In this configuration, it provides undervoltage lockout (UVLO) at 1.7 V and overvoltage detection at 1.89 V, enabling self-supply supervision for standalone reset functionality without additional components.

What is the maximum capacitive load the RESET pin can drive in TPS3703A7180DSERQ1?

The RESET pin of TPS3703A7180DSERQ1 is an open-drain output specified for 10 pF load in timing tests, with VOL ≤ 250 mV at I_OUT = 5 mA (VDD = 5 V). For heavier loads, a stronger pull-up resistor (e.g., 4.7 kΩ) or buffer may be required to maintain rise time <2.2 µs and avoid timing violations in high-speed processor reset interfaces.