Texas Instruments TPS3703A4180DSERQ1

Overview

TPS3703A4180DSERQ1 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 1.8 V UV/OV window threshold, ±4% window tolerance, and 10 ms / 200 ms dual fixed time delay options. It delivers reliable power-on reset and fault detection for ADAS domain controllers.

For engineers reviewing the TPS3703A4180DSERQ1 datasheet, TPS3703A4180DSERQ1 pinout, TPS3703A4180DSERQ1 application, or TPS3703A4180DSERQ1 equivalent, key selection criteria include its integrated window supervision without external resistors, open-drain active-low RESET output with latching behavior, manual reset (MR) support, CT-pin programmable timing, and guaranteed operation under automotive thermal and ESD stress conditions.

Technical Context

The TPS3703A4180DSERQ1 implements dual precision comparators with an internal trimmed resistor divider and reference to deliver fixed 1.8 V window thresholds (VIT− = 1.728 V, VIT+ = 1.872 V) and ±4% window tolerance. Its architecture eliminates external resistor networks, reducing BOM count and eliminating resistor tolerance-induced error.

Timing control is managed via the CT pin: floating CT selects 10 ms delay; connection to VDD via 10 kΩ selects 200 ms delay; capacitor-to-ground enables user-programmable delay. The device asserts RESET low on OV/UV violation or MR assertion, with glitch immunity of 3.5 µs on SENSE and 25 ns on MR, and supports latched output mode.

Key Specifications

Pinout & Package

TPS3703A4180DSERQ1 uses the WSON-6 (DSE) package: 1.50 mm × 1.50 mm, 0.5 mm pitch, wettable flank, thermally enhanced bottom-exposed pad.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3703A4180DSERQ1, the DSETQ1 variant offers identical supervision performance but optimized logistics for volume manufacturing, while TLV809E18DBZRQ1 trades window detection, programmable timing, and manual reset capability for reduced complexity and cost in non-safety-critical UV-only use cases.

Availability

TPS3703A4180DSERQ1 is available at Aetrix Electronics and suitable for ADAS domain controllers, digital cockpit ECUs, and HEV/EV battery interface modules requiring stable component supply with automotive-grade reliability and traceable sourcing.

Supply support for TPS3703A4180DSERQ1 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 delivering analog and embedded processing solutions, with decades of automotive qualification expertise and broad portfolio of AEC-Q100-compliant devices.

The TPS3703-Q1 product line was designed specifically for functional-safety-aware automotive power monitoring - integrating precision window supervision, latch-mode reset, and diagnostic-ready features to simplify ISO 26262 ASIL-B system compliance.

FAQ

What is the exact undervoltage and overvoltage threshold for TPS3703A4180DSERQ1?

The TPS3703A4180DSERQ1 has a fixed 1.8 V window threshold with ±4% tolerance: VIT− (undervoltage) = 1.728 V and VIT+ (overvoltage) = 1.872 V, specified over –40°C to +125°C ambient temperature. These values are factory-trimmed and do not require external components. The TPS3703A4180DSERQ1 achieves ±0.7% total accuracy across temperature, making it suitable for tight-margin 1.8 V rail supervision in automotive ECUs.

How does the CT pin configure reset timing on TPS3703A4180DSERQ1?

The CT pin on TPS3703A4180DSERQ1 selects between two fixed delays: 10 ms when left floating, and 200 ms when pulled to VDD via a 10 kΩ resistor. It also supports user-programmable delay using an external capacitor from CT to GND - enabling precise timing adjustment without changing firmware or layout. The TPS3703A4180DSERQ1 re-evaluates CT configuration each time SENSE re-enters the valid window, ensuring dynamic adaptability.

Does TPS3703A4180DSERQ1 support manual reset, and how is it implemented?

Yes, TPS3703A4180DSERQ1 supports manual reset via the MR pin: driving MR below VMR_L (0.3 V typical) asserts RESET low immediately, independent of SENSE status. After MR is deasserted, RESET remains low for the full reset delay time (tD) before releasing - ensuring clean, synchronized recovery. The MR pin is internally pulled up, so it may be left floating when unused. This functionality is fully integrated into the TPS3703A4180DSERQ1 and requires no external circuitry.

What package type and dimensions does TPS3703A4180DSERQ1 use?

TPS3703A4180DSERQ1 uses the WSON-6 (DSE) package: 1.50 mm × 1.50 mm body, 0.5 mm pin pitch, with an exposed thermal pad on the bottom. It is RoHS-compliant, halogen-free, and qualified per AEC-Q100 Grade 1. The compact size and wettable flanks support automated optical inspection (AOI) and high-yield reflow in automotive PCB assembly - a key advantage of the TPS3703A4180DSERQ1 over larger SOIC or SOT-23 alternatives.

Is TPS3703A4180DSERQ1 qualified for functional safety applications?

Yes, TPS3703A4180DSERQ1 is functional safety-capable and documented to aid ISO 26262 ASIL-B system design. It includes features such as built-in glitch immunity (3.5 µs on SENSE), latched RESET output, high-accuracy thresholds, and AEC-Q100 Grade 1 qualification - all verified under automotive stress conditions. Texas Instruments provides FIT rate data, failure mode documentation, and safety manuals specifically for the TPS3703A4180DSERQ1 to support safety case development.