Texas Instruments TPS3703E4080DSERQ1

Overview

TPS3703E4080DSERQ1 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, 7 µA max quiescent current, and fixed 50 µs reset time delay - designed for safety-critical power sequencing in ADAS domain controllers and digital cockpits.

For engineers reviewing the TPS3703E4080DSERQ1 datasheet, TPS3703E4080DSERQ1 pinout, TPS3703E4080DSERQ1 application, or TPS3703E4080DSERQ1 equivalent, key selection considerations include its dual OV/UV window detection with no external resistors, open-drain active-low RESET output, manual reset (MR) input, CT pin for time-delay configuration, and functional safety documentation support.

Technical Context

The TPS3703E4080DSERQ1 integrates two precision comparators and a trimmed resistor divider to implement fixed window voltage supervision without external components. Its internal reference and matched resistors deliver ±0.7% total threshold accuracy over temperature, while built-in hysteresis and glitch immunity (3.5 µs at 5% overdrive) prevent false resets under transient noise.

This variant uses the "D" time-delay option: CT pin open or tied to VDD yields 50 µs nominal reset delay, matching the "TPS3703D" nomenclature. It features UV/OV window tolerance of ±4%, with fixed thresholds at 0.80 V (UV) and 0.85 V (OV), and supports latching RESET output mode with manual reset assertion via MR pin.

Key Specifications

Pinout & Package

TPS3703E4080DSERQ1 is housed in a 1.50 mm × 1.50 mm, 6-pin WSON (DSE) package with wettable flanks for automated optical inspection.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar overvoltage and undervoltage monitoring applications.

Compared with TPS3703A4080DSERQ1 and TLV809E80DBZR, the TPS3703E4080DSERQ1 uniquely delivers ultrafast 50 µs reset response with full OV/UV window supervision and MR capability - essential for ASIL-B/C domain controllers requiring deterministic fault reaction times.

Availability

TPS3703E4080DSERQ1 is available at Aetrix Electronics and suitable for automotive ADAS domain controllers, digital cockpit SoC power management, and HEV/EV battery interface modules requiring stable component supply, long-term lifecycle support, and AEC-Q100 compliance.

Supply support for TPS3703E4080DSERQ1 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, embedded processing, and connectivity solutions with deep automotive expertise and functional safety infrastructure.

The TPS3703-Q1 product line was engineered specifically for ISO 26262-compliant automotive power supervision - integrating precision window detection, latch-mode RESET, and AEC-Q100 Grade 1 reliability into the industry's smallest 6-pin WSON package.

FAQ

What is the exact overvoltage and undervoltage threshold configuration for TPS3703E4080DSERQ1?

The TPS3703E4080DSERQ1 is configured with fixed thresholds of 0.80 V (undervoltage) and 0.85 V (overvoltage), forming a 50-mV window. This matches the "E4080" nomenclature: "E" denotes ±4% window tolerance, "4080" specifies 0.80 V UV and 0.85 V OV (50 mV step). Accuracy is ±0.7% across –40°C to +125°C, verified per TI SBVS344D datasheet Section 7.5.

How does the CT pin function in TPS3703E4080DSERQ1, and what reset delay does it provide?

In TPS3703E4080DSERQ1, the CT pin is configured for the "D" option: leaving CT open (or tying to VDD) selects the fixed 50 µs reset time delay. This is confirmed in TI's device nomenclature legend (Figure 5-1) and timing table (Section 7.6), where TPS3703D variants specify 50 µs nominal tD. No external capacitor is required or used in this configuration.

Is TPS3703E4080DSERQ1 qualified for automotive safety applications, and what documentation supports functional safety design?

Yes, TPS3703E4080DSERQ1 is AEC-Q100 Grade 1 qualified (–40°C to +125°C) and explicitly labeled "Functional Safety-Capable." TI provides dedicated functional safety documentation including FIT rate data, failure mode analysis, and diagnostic coverage metrics - referenced in the "Functional Safety-Capable" feature bullet and Section 12.2 of the SBVS344D datasheet.

Can TPS3703E4080DSERQ1 monitor a supply voltage higher than its VDD pin voltage?

Yes. The SENSE pin accepts voltages up to 5.5 V independently of VDD, enabling monitoring of higher rails (e.g., 3.3 V or 5 V) while powering the TPS3703E4080DSERQ1 from a lower VDD (e.g., 1.8 V or 3.3 V). This is specified in Section 7.3 (Recommended Operating Conditions) and enables flexible partitioning of supervision and supply domains in multi-rail automotive systems.

What is the role of the MR pin in TPS3703E4080DSERQ1, and how is it interfaced?

The MR (Manual Reset) pin on TPS3703E4080DSERQ1 is an active-low input that forces RESET assertion when pulled below 0.3 V (VMR_L). It features an internal ~100 kΩ pull-up, so it may be left floating or tied to VDD when unused. Assertion duration follows the configured 50 µs delay, and MR is ignored during ongoing RESET low events - details are in Section 6 (Pin Functions) and Figure 8-2 of the datasheet.