Texas Instruments TPS3779BDBVR

Overview

TPS3779BDBVR from Texas Instruments is a dual-channel, low-power voltage detector IC with push-pull outputs, designed for precise monitoring of two independent supply rails in space-constrained systems. It features 5% factory-set hysteresis, ±1% VIT+ threshold accuracy over –40°C to 125°C, 2 µA typical quiescent current, and operates from 1.5 V to 6.5 V VDD. It is used in microcontroller reset supervision and power-rail sequencing where high accuracy and low power are critical.

For engineers reviewing the TPS3779BDBVR datasheet, TPS3779BDBVR pinout, TPS3779BDBVR application, or TPS3779BDBVR equivalent, this page delivers verified technical context, real-world design meaning for each specification, validated pin functions, confirmed alternative options with documented differences, and supply-chain support tailored for industrial and embedded OEM deployments.

Technical Context

The TPS3779BDBVR integrates two independent high-accuracy comparators with internal reference and fixed 5% hysteresis-ensuring noise immunity without external components. Each SENSE input accepts 0–6.5 V regardless of VDD, enabling rail-agnostic monitoring of diverse voltage domains.

Its push-pull outputs drive high/low directly from VDD (no pull-up required), supporting CMOS-level interfacing to MCU reset inputs or regulator enable pins. Startup delay is fixed at 570 µs after VDD crosses 1.5 V, and propagation delays are 5.5 µs (rising) and 10 µs (falling) under typical conditions.

Key Specifications

Pinout & Package

SOT23-6 package (2.92 mm × 1.30 mm), thermally optimized for compact PCB layouts with low thermal resistance (RθJA = 193.9°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3779CDBVR and TPS3780BDBVR, the TPS3779BDBVR offers optimal balance of noise rejection and response speed for general-purpose dual-rail supervision, while its push-pull outputs reduce board area and eliminate pull-up resistor selection overhead.

Availability

TPS3779BDBVR is available at Aetrix Electronics and suitable for microcontroller reset supervision, power-supply sequencing, and battery-powered medical devices requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TPS3779BDBVR 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 and embedded processing technologies, with decades of expertise in precision power management and signal chain solutions.

The TPS37xx family was engineered specifically for high-accuracy, ultra-low-power voltage monitoring in space- and energy-constrained applications - targeting industrial automation, portable medical, and automotive subsystems.

FAQ

What is the hysteresis value of the TPS3779BDBVR?

The TPS3779BDBVR has a factory-set hysteresis of 5%, meaning the difference between its rising threshold (VIT+) and falling threshold (VIT–) is exactly 5% of VIT+. This value is trimmed during production and does not require external components - it ensures robust immunity to supply noise without design overhead. The hysteresis is fixed and cannot be adjusted externally.

Can the TPS3779BDBVR monitor voltages higher than its VDD supply?

Yes, the TPS3779BDBVR can monitor input voltages up to 6.5 V on SENSE1 and SENSE2 independently of VDD, which may be as low as 1.5 V. This rail-agnostic sensing enables monitoring of higher-voltage rails (e.g., 5 V or 6 V) while powering the device from a lower-voltage domain (e.g., 1.8 V or 3.3 V), simplifying system power architecture.

What is the startup behavior of the TPS3779BDBVR during power-on?

Upon VDD crossing 1.5 V, the TPS3779BDBVR enters a 570 µs startup delay period before outputs respond to SENSE inputs. During this time, outputs remain in a known high-impedance state until the internal reference stabilizes. This ensures deterministic reset timing and prevents spurious assertions during power ramp-up - critical for reliable MCU boot sequences.

Does the TPS3779BDBVR require external pull-up resistors on its outputs?

No, the TPS3779BDBVR features push-pull outputs (OUT1 and OUT2), which actively drive high to VDD and low to GND. Unlike open-drain alternatives, it requires no external pull-up resistors - reducing BOM count, saving PCB area, and eliminating resistor tolerance and leakage concerns in low-power designs.

How accurate is the threshold voltage of the TPS3779BDBVR over temperature?

The TPS3779BDBVR guarantees ±1% VIT+ accuracy over the full operating temperature range of –40°C to 125°C. This is confirmed by TI's production testing and statistical data across thousands of units - ensuring consistent trip points without derating or guard-banding in automotive or industrial thermal environments.