Texas Instruments TPS3703A7330DSERQ1

Overview

TPS3703A7330DSERQ1 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 3.3 V window threshold (±3% tolerance), and 10 ms / 200 ms dual fixed time delay options - used for power-rail supervision in ADAS domain controllers and digital cockpits.

For engineers reviewing the TPS3703A7330DSERQ1 datasheet, TPS3703A7330DSERQ1 pinout, TPS3703A7330DSERQ1 application, or TPS3703A7330DSERQ1 equivalent, this page delivers verified functional safety–capable voltage supervision specs, validated CT-pin time-delay behavior, confirmed open-drain RESET latching output mode, and exact SENSE/VDD separation for redundant monitoring in ISO 26262-compliant systems.

Technical Context

The TPS3703A7330DSERQ1 integrates dual precision comparators with an internal trimmed resistor divider and reference, eliminating external resistors for 3.3 V window detection (VIT+ = 3.4 V, VIT− = 3.2 V). Its CT pin supports factory-configured dual fixed delays (10 ms when floating, 200 ms when tied to VDD via 10 kΩ) and programmable delay via external capacitor.

It features latch-mode RESET output with glitch immunity (3.5 µs at 5% overdrive), manual reset (MR) input with 1 µs minimum pulse width, and separate SENSE/VDD pins enabling independent rail monitoring - critical for fault-tolerant automotive power sequencing where VDD may remain valid while SENSE drops out.

Key Specifications

Pinout & Package

TPS3703A7330DSERQ1 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 supports operation up to +125°C ambient without forced airflow.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3703A7330DSERQ1, the TPS3703A5330DSERQ1 trades threshold precision for lower unit cost in non-functional-safety contexts, while TLV809E33DBVR omits critical window detection and latching - making it unsuitable for ISO 26262-compliant ADAS or digital cockpit designs.

Availability

TPS3703A7330DSERQ1 is available at Aetrix Electronics and suitable for ADAS domain controllers, digital cockpit SoCs, and HEV/EV battery management interfaces requiring stable component supply with AEC-Q100 compliance and functional safety documentation support.

Supply support for TPS3703A7330DSERQ1 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, embedded processing, and automotive ICs, with decades of automotive qualification expertise and broad AEC-Q100 portfolio coverage.

The TPS3703-Q1 product line delivers AEC-Q100 Grade 1 voltage supervisors with integrated window detection, programmable timing, and functional safety documentation - engineered specifically for ASIL-B/C power-rail monitoring in ADAS, digital cockpit, and electrified vehicle systems.

FAQ

What is the exact overvoltage and undervoltage threshold for TPS3703A7330DSERQ1?

The TPS3703A7330DSERQ1 has a fixed 3.3 V window threshold with ±3% tolerance: VIT+ (OV) = 3.4 V and VIT− (UV) = 3.2 V, specified across –40°C to +125°C. These values are factory-trimmed and do not require external components - confirmed in TI's SBVS344D datasheet Section 7.5 Electrical Characteristics.

Does TPS3703A7330DSERQ1 support programmable reset delay?

Yes, TPS3703A7330DSERQ1 supports both fixed and programmable reset delay. With CT pin open, delay is 10 ms; with CT tied to VDD via 10 kΩ, delay is 200 ms. Connecting an external capacitor from CT to GND enables user-defined delay - e.g., 1 nF yields ~1 ms, per Figure 7-20 in the datasheet.

How does the latching RESET output behave in TPS3703A7330DSERQ1?

The TPS3703A7330DSERQ1 RESET output remains latched low until two conditions are met: (1) the SENSE voltage returns within the 3.2 V–3.4 V window, and (2) the full reset delay time (e.g., 10 ms or 200 ms) expires. This prevents premature release during marginal recovery - a key requirement for ASIL-B/C systems.

Can TPS3703A7330DSERQ1 monitor a different voltage than its own supply rail?

Yes. TPS3703A7330DSERQ1 uses separate SENSE and VDD pins: SENSE monitors the target rail (e.g., 3.3 V core), while VDD powers the IC itself. This enables true redundancy - for example, monitoring a post-LDO rail while VDD is supplied from a separate pre-LDO source - as required in ISO 26262 fault-tolerant architectures.

Is TPS3703A7330DSERQ1 qualified for automotive safety applications?

Yes. TPS3703A7330DSERQ1 is AEC-Q100 Grade 1 qualified (–40°C to +125°C), has documented functional safety capability per ISO 26262, and includes FIT rate data, failure mode analysis, and safety manual support - all provided by Texas Instruments for integration into ASIL-B and ASIL-C systems like ADAS domain controllers.