Texas Instruments TPS3780AQDBVRQ1

Overview

TPS3780AQDBVRQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified dual-channel voltage detector IC for automotive power-rail monitoring, featuring open-drain outputs, 1.0% threshold accuracy, 5% factory-set hysteresis, and 2 µA typical quiescent current over –40°C to +125°C. It monitors two independent supply rails (e.g., 3.3 V and 3.0 V) with adjustable thresholds via external resistor dividers and drives reset/enable inputs of MCUs or PMICs.

For engineers reviewing the TPS3780AQDBVRQ1 datasheet, TPS3780AQDBVRQ1 pinout, TPS3780AQDBVRQ1 application, or TPS3780AQDBVRQ1 equivalent, key selection criteria include its open-drain output compatibility with mixed-voltage logic domains, ±0.4% VIT+ deviation across temperature, and SOT-23-6 package suitability for space-constrained ADAS and infotainment modules.

Technical Context

The TPS3780AQDBVRQ1 implements two independent high-accuracy comparators with internal reference trimming, each supporting rising/falling thresholds (VIT+ = 1.194 V, VIT– = 1.134 V) and fixed 5% hysteresis. Its SENSE1/SENSE2 inputs accept 0–5.5 V signals regardless of VDD (1.5–5.5 V), enabling rail-agnostic monitoring.

Open-drain outputs (OUT1/OUT2) require external pullup resistors (1.5–10 kΩ) and support voltage-level translation up to 5.5 V independent of VDD. Startup delay is 570 µs after VDD crosses VDD(min), and propagation delays are 5.5 µs (rising) and 10 µs (falling) under typical conditions.

Key Specifications

Pinout & Package

SOT-23-6 package (2.90 mm × 1.60 mm) with exposed pad not electrically connected; suitable for reflow assembly and high-density automotive PCBs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel voltage detector applications.

Compared with TPS3780AQDBVRQ1, the TPS3780BQDBVRQ1 eliminates external pullups but constrains output voltage compatibility, while the TPS3780CQDBVRQ1 trades detection precision for enhanced noise rejection-making the 'A' variant optimal for balanced accuracy and flexibility in mixed-voltage automotive subsystems.

Availability

TPS3780AQDBVRQ1 is available at Aetrix Electronics and suitable for ADAS domain controllers, digital instrument clusters, and infotainment head-units requiring stable component supply across extended automotive lifecycles.

Supply support for TPS3780AQDBVRQ1 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-grade power management and signal conditioning ICs.

The TPS37xx-Q1 product line delivers high-accuracy, low-power voltage supervision for safety-critical automotive systems, designed specifically to meet AEC-Q100 requirements and simplify compliance in ADAS, body electronics, and infotainment applications.

FAQ

What is the maximum input voltage allowed on SENSE1 and SENSE2 pins of the TPS3780AQDBVRQ1?

The TPS3780AQDBVRQ1 supports SENSE1 and SENSE2 input voltages from 0 V to 5.5 V, independent of the VDD supply voltage. This allows direct monitoring of higher-voltage rails (e.g., 5 V) even when the device is powered from a lower VDD such as 3.3 V or 1.8 V, eliminating the need for external level-shifting circuitry in mixed-rail systems.

Does the TPS3780AQDBVRQ1 require external pullup resistors on its outputs?

Yes, the TPS3780AQDBVRQ1 features open-drain outputs (OUT1 and OUT2), so external pullup resistors are mandatory for proper logic-high assertion. The recommended pullup resistance range is 1.5 kΩ to 10 kΩ, and the outputs can be pulled up to any voltage ≤5.5 V-enabling interoperability with diverse logic families without tying pullup voltage to VDD.

How does the 5% hysteresis of the TPS3780AQDBVRQ1 affect its reset behavior?

The 5% hysteresis in the TPS3780AQDBVRQ1 sets VIT– = 1.134 V (for nominal VIT+ = 1.194 V), creating a 60 mV voltage window between assertion and deassertion. This prevents oscillatory reset toggling during slow supply recovery or noise-induced threshold crossings, ensuring clean, glitch-free reset signaling essential for automotive MCU initialization.

Can the TPS3780AQDBVRQ1 monitor two different voltage rails simultaneously?

Yes, the TPS3780AQDBVRQ1 has two fully independent monitoring channels (SENSE1/OUT1 and SENSE2/OUT2), each configurable via separate resistor dividers. It can supervise disparate rails-for example, a 3.3 V MCU supply and a 5 V camera interface rail-providing dedicated reset signals without crosstalk or shared timing dependencies.

What is the startup delay specification for the TPS3780AQDBVRQ1, and when does it apply?

The TPS3780AQDBVRQ1 has a 570 µs startup delay (tSD) that begins when VDD crosses VDD(min) after power-on or a deep brownout event. During this period, outputs remain undefined; only after tSD expires do OUT1 and OUT2 begin responding to SENSE1/SENSE2 states-ensuring reliable reset assertion once internal circuitry stabilizes.