Texas Instruments TPS3703B5180DSERQ1

Overview

TPS3703B5180DSERQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive overvoltage/undervoltage reset IC in a 6-pin WSON (DSE) package, featuring ±0.7% threshold accuracy across –40°C to +125°C, fixed 1 ms / 20 ms time delay options via CT pin configuration, and open-drain active-low RESET output for processor supervision in ADAS domain controllers.

For engineers reviewing the TPS3703B5180DSERQ1 datasheet, TPS3703B5180DSERQ1 pinout, TPS3703B5180DSERQ1 application, or TPS3703B5180DSERQ1 equivalent, key selection criteria include its dual OV/UV window detection with 5.18 V nominal threshold, 7 µA max quiescent current, 1.7–5.5 V supply range, and functional safety documentation support for ISO 26262 ASIL-B system integration.

Technical Context

The TPS3703B5180DSERQ1 integrates two precision comparators with internal trimmed resistor dividers and a stable voltage reference to implement fixed-window monitoring without external resistors. Its SENSE and VDD pins are physically separated to support redundant supply monitoring in safety-critical automotive systems.

Reset timing is determined by CT pin state: floating enables 1 ms delay, connection to VDD via 10 kΩ resistor enables 20 ms delay, and an external capacitor allows programmable delay down to ~50 µs. The device asserts RESET low on OV (>5.18 V), UV (<5.18 V), MR assertion, or UVLO (VDD < 1.7 V).

Key Specifications

Pinout & Package

TPS3703B5180DSERQ1 uses a 1.50 mm × 1.50 mm, 6-pin WSON (DSE) package with wettable flanks for automated optical inspection. Thermal resistance R_θJA is 184.2°C/W, suitable for compact automotive PCB layouts without forced airflow.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3703A5180DSERQ1 and TLV809E50DBVR, the TPS3703B5180DSERQ1 uniquely delivers automotive-grade dual OV/UV supervision with millisecond-scale configurable timing in the smallest footprint, making it optimal for space-constrained ADAS ECUs requiring ASIL-B support.

Availability

TPS3703B5180DSERQ1 is available at Aetrix Electronics and suitable for advanced driver assistance systems (ADAS), automotive digital cockpits, and HEV/EV battery management interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TPS3703B5180DSERQ1 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 was developed specifically for ISO 26262-compliant automotive systems requiring high-accuracy, low-power voltage supervision with integrated OV/UV window detection and redundant monitoring capability.

FAQ

What is the exact overvoltage and undervoltage threshold for TPS3703B5180DSERQ1?

The TPS3703B5180DSERQ1 features a fixed 5.18 V window threshold with ±5% tolerance at +25°C and ±7% over –40°C to +125°C. Both overvoltage (VIT+) and undervoltage (VIT–) trip points are centered at 5.18 V, forming a symmetrical window where RESET asserts low if SENSE voltage rises above or falls below this band. This specification is factory-trimmed and does not require external components.

How does the CT pin configure reset delay timing on TPS3703B5180DSERQ1?

On the TPS3703B5180DSERQ1, the CT pin selects between two fixed delays: leaving CT open configures 1 ms delay, while connecting CT to VDD via a 10 kΩ resistor configures 20 ms delay. The device detects CT state automatically each time SENSE re-enters the valid window. No external capacitor is required for these modes, though one can be added for programmable delays.

Is TPS3703B5180DSERQ1 qualified for automotive applications?

Yes, the TPS3703B5180DSERQ1 is AEC-Q100 qualified for Grade 1 (–40°C to +125°C ambient), with HBM ESD rating of ±2000 V and CDM rating of ±500 V. It includes functional safety documentation supporting ISO 26262 ASIL-B system integration, and is designed for use in ADAS, digital cockpits, and HEV/EV powertrain systems.

Can TPS3703B5180DSERQ1 monitor a supply different from its own VDD rail?

Yes, the TPS3703B5180DSERQ1 supports independent SENSE and VDD connections. For example, it can be powered from a 3.3 V rail (VDD) while monitoring a 5 V domain controller supply on the SENSE pin. This separation enables fault-isolated supervision critical for automotive safety architectures and eliminates single-point failure risks.

What is the maximum supply voltage and quiescent current of TPS3703B5180DSERQ1?

The TPS3703B5180DSERQ1 operates from 1.7 V to 5.5 V on VDD and draws a maximum of 7 µA quiescent current across temperature and voltage range. At typical conditions (VDD = 3.3 V, TJ = 25°C), supply current is 4.5 µA, enabling always-on monitoring in battery-sensitive automotive modules without compromising runtime.