Texas Instruments TPS3779CDBVR

Overview

TPS3779CDBVR from Texas Instruments is a dual-channel, push-pull output voltage detector IC designed for precision rail monitoring in low-power systems. It features 10% factory-set hysteresis, ±1% VIT+ threshold accuracy over –40°C to 125°C, and 2 µA typical quiescent current. The device operates from 1.5 V to 6.5 V VDD and supports adjustable detection down to 1.2 V via external resistor dividers-used in microcontroller reset supervision and power-supply sequencing.

For engineers reviewing the TPS3779CDBVR datasheet, TPS3779CDBVR pinout, TPS3779CDBVR application, or TPS3779CDBVR equivalent, key selection criteria include its push-pull output architecture (eliminating external pull-ups), tight temperature-stable threshold deviation (±0.4% max over –40°C to 125°C), dual independent SENSE inputs with glitch immunity, and SOT23-6 package compatibility with space-constrained portable and industrial designs.

Technical Context

The TPS3779CDBVR implements two independent high-accuracy comparators, each with trimmed rising (VIT+) and falling (VIT–) thresholds and fixed 10% hysteresis. Its push-pull outputs drive high to VDD and low to GND without external components, enabling direct interfacing with 1.5–6.5 V logic domains. Thresholds are referenced to an internal bandgap and remain stable across supply and temperature.

Startup delay is fixed at 570 µs after VDD crosses VDD(min); propagation delays are 5.5 µs (rising) and 10 µs (falling). Input bias current is ±15 nA, allowing high-impedance resistor dividers (e.g., >1 MΩ total) with minimal error-critical for battery-powered applications requiring ultra-low standby current.

Key Specifications

Pinout & Package

SOT23-6 package (2.92 mm × 1.30 mm), thermally optimized for PCB mounting with low 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 TPS3779BDBVR and TPS3780CDBVR, the TPS3779CDBVR uniquely delivers 10% hysteresis with push-pull outputs-optimizing for noise immunity and minimal external components in compact, low-power designs where VDD-aligned logic levels are sufficient.

Availability

TPS3779CDBVR 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 TPS3779CDBVR 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, low-quiescent-current voltage monitoring in space- and power-constrained applications-from portable electronics to automotive control units.

FAQ

What is the hysteresis value of the TPS3779CDBVR?

The TPS3779CDBVR has a factory-set hysteresis of 10%, meaning the difference between its rising threshold (VIT+) and falling threshold (VIT–) is exactly 10% of VIT+. This value is laser-trimmed during production and does not require external components. It provides robust immunity to supply noise in demanding environments such as motor drives or industrial PLCs where the TPS3779CDBVR is deployed.

Does the TPS3779CDBVR require external pull-up resistors on its outputs?

No, the TPS3779CDBVR uses push-pull outputs that actively drive both high (to VDD) and low (to GND), eliminating the need for external pull-up resistors. This reduces bill-of-materials cost and PCB area versus open-drain alternatives like the TPS3780CDBVR. The TPS3779CDBVR outputs are fully compatible with 1.5–6.5 V logic families when VDD is within specification.

Can the TPS3779CDBVR monitor voltages higher than its VDD supply?

Yes, the SENSE1 and SENSE2 inputs accept voltages from 0 V to 6.5 V regardless of VDD level (1.5–6.5 V), enabling rail-to-rail monitoring of higher-voltage supplies-such as a 5 V analog rail-while powered from a 3.3 V domain. This capability is confirmed in the Absolute Maximum Ratings table and Electrical Characteristics section of the TPS3779CDBVR datasheet.

What is the startup delay of the TPS3779CDBVR after power-on?

The TPS3779CDBVR has a fixed startup delay of 570 µs after VDD crosses the minimum operating threshold (VDD(min)). During this period, outputs remain in an undefined state until internal circuitry stabilizes. This parameter is guaranteed across –40°C to +125°C and is critical for synchronizing reset assertion with power-rail stabilization in systems using the TPS3779CDBVR.

How accurate is the threshold voltage of the TPS3779CDBVR over temperature?

The TPS3779CDBVR maintains ±1% VIT+ accuracy over the full –40°C to +125°C junction temperature range, with measured deviation bounded by ±0.4% across temperature per characterization data. This stability is achieved through on-chip trimming and bandgap referencing-ensuring reliable undervoltage detection in automotive engine control units and industrial sensors where the TPS3779CDBVR is commonly applied.