Texas Instruments TPS3703C7500DSERQ1

Overview

TPS3703C7500DSERQ1 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 5 ms / 100 ms dual-time-delay selection via CT pin configuration, and open-drain active-low RESET output. It is used in ADAS domain controllers for precise power-rail supervision during cold-crank and load-dump transients.

For engineers reviewing the TPS3703C7500DSERQ1 datasheet, TPS3703C7500DSERQ1 pinout, TPS3703C7500DSERQ1 application, or TPS3703C7500DSERQ1 equivalent, key selection criteria include its window threshold of 750 mV (±5% tolerance), dual fixed time delay (5 ms / 100 ms), UVLO at 1.7 V, 7 µA max quiescent current, and functional safety documentation support for ISO 26262 ASIL-B system integration.

Technical Context

The TPS3703C7500DSERQ1 integrates two precision comparators with a trimmed internal resistor divider and reference to implement a fixed 750 mV window supervisor - VIT+(OV) = 750 mV + 37.5 mV (±5%), VIT–(UV) = 750 mV – 37.5 mV (±5%). Its CT pin supports factory-programmed delay modes: floating CT yields 5 ms, CT tied to VDD via 10 kΩ yields 100 ms.

It features separate SENSE and VDD pins for supply redundancy, internal glitch immunity (3.5 µs for VIT±, 25 ns for MR), and latching RESET output that remains asserted until both SENSE re-enters the valid window and tD expires. The device asserts RESET low on overvoltage, undervoltage, manual reset, or UVLO conditions - with no external resistors required for threshold setting.

Key Specifications

Pinout & Package

TPS3703C7500DSERQ1 uses the WSON-6 (DSE) package: 1.50 mm × 1.50 mm, 0.5 mm pitch, wettable flank, thermally enhanced bottom paddle.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3703A7500DSERQ1 and TLV809E75DBZRQ1, the TPS3703C7500DSERQ1 uniquely delivers 5-ms fast-response window supervision with automotive-grade redundancy - making it optimal for ADAS SoC core rail monitoring where both OV and UV faults must trigger immediate, deterministic reset.

Availability

TPS3703C7500DSERQ1 is available at Aetrix Electronics and suitable for ADAS domain controllers, digital cockpit systems, HEV/EV battery interfaces, and automotive infotainment modules requiring stable component supply with AEC-Q100 traceability and long-term automotive lifecycle support.

Supply support for TPS3703C7500DSERQ1 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 TPS3703-Q1 product line delivers high-accuracy, AEC-Q100-qualified window supervisors designed specifically for safety-critical automotive power-rail monitoring in ADAS, digital cockpit, and electrification systems.

FAQ

What is the exact window threshold voltage of the TPS3703C7500DSERQ1?

The TPS3703C7500DSERQ1 has a fixed factory-set window threshold centered at 750 mV with ±5% tolerance - meaning VIT+(OV) = 750 mV + 37.5 mV and VIT–(UV) = 750 mV – 37.5 mV. This value is trimmed and verified across temperature, delivering ±0.7% accuracy from –40°C to +125°C. No external components are required to set this threshold, and it is not user-adjustable.

How does the CT pin configure the reset time delay for the TPS3703C7500DSERQ1?

The CT pin on the TPS3703C7500DSERQ1 selects between two fixed factory-programmed delays: 5 ms when left floating (open), and 100 ms when pulled to VDD via a 10-kΩ resistor. Unlike programmable variants, this part does not support capacitor-based timing - the CT pin functions solely as a binary selector. The internal state machine re-evaluates CT configuration each time SENSE re-enters the valid window.

Does the TPS3703C7500DSERQ1 support overvoltage detection, or is it UV-only?

The TPS3703C7500DSERQ1 is a true window supervisor supporting both overvoltage and undervoltage detection. Its 750 mV window includes distinct VIT+(OV) and VIT–(UV) thresholds, each with independent hysteresis. It asserts RESET low if SENSE rises above VIT+(OV) OR falls below VIT–(UV). This dual-direction supervision is confirmed in the functional truth table and block diagram of the official datasheet.

What is the UVLO threshold of the TPS3703C7500DSERQ1, and how does it interact with RESET?

The TPS3703C7500DSERQ1 has an undervoltage lockout (UVLO) threshold of 1.7 V on the VDD pin. When VDD falls below 1.7 V, the device forces RESET low regardless of SENSE voltage - ensuring fail-safe behavior during severe brown-out. This is distinct from the SENSE-based UV detection and provides a secondary safety layer. UVLO is specified with 1.2 V min and 1.7 V typ in datasheet Section 7.5.

Can the TPS3703C7500DSERQ1 be used without connecting the MR pin?

Yes - the MR pin of the TPS3703C7500DSERQ1 has an internal 100-kΩ pull-up to VDD and may be left floating if manual reset functionality is not required. In that configuration, the device operates solely on SENSE voltage monitoring and automatic reset timing. The MR pin only affects RESET when actively driven below VMR_L (≤0.3 V); otherwise, it has no influence on normal supervision behavior.