Texas Instruments TPS3779DDRYT

Overview

TPS3779DDRYT from Texas Instruments is a dual-channel, low-power, high-accuracy voltage detector in a 1.45 mm × 1.00 mm µSON-6 package. It features push-pull outputs, 1% threshold accuracy (VIT+ = 1.182 V), 2 µA typical quiescent current, and operates across –40°C to 125°C for monitoring two independent power rails in space-constrained portable or industrial systems.

For engineers reviewing the TPS3779DDRYT datasheet, TPS3779DDRYT pinout, TPS3779DDRYT application, or TPS3779DDRYT equivalent, this page delivers verified electrical specs, thermal behavior, hysteresis options, output drive capability, and real-world rail-monitoring use cases - all confirmed against TI's SBVS250 datasheet and official product documentation.

Technical Context

The TPS3779DDRYT integrates two independent comparators with internal precision reference and factory-set 1% hysteresis (TPS3779D variant), enabling robust undervoltage detection on SENSE1 and SENSE2 inputs over 1.5 V–6.5 V supply range. Each channel asserts its respective push-pull output (OUT1/OUT2) low when input falls below VIT– (1.170 V at 25°C) and deasserts high when rising above VIT+ (1.182 V).

Its architecture supports adjustable detection thresholds via external resistor dividers, rejects noise via built-in hysteresis, and guarantees stable operation without external pull-ups due to push-pull topology. Startup delay is fixed at 570 µs after VDD crosses VDD(min), and propagation delays are 5.5 µs (rising) and 10 µs (falling) under nominal conditions.

Key Specifications

Pinout & Package

TPS3779DDRYT uses a 6-pin µSON package (DRY), 1.45 mm × 1.00 mm body size, with wettable flanks for automated optical inspection. Thermal resistance RθJA = 306.7°C/W reflects compact footprint and limited heat dissipation capability - requires careful PCB copper area planning in high-ambient applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3779DDRYT, TPS3779DBVR trades package size for manufacturability while preserving identical detection behavior, whereas TPS3780DDBVR sacrifices push-pull simplicity for voltage-level flexibility - making each alternative suitable for distinct layout or interface constraints rather than performance upgrades.

Availability

TPS3779DDRYT is available at Aetrix Electronics and suitable for power-supply sequencing, early-warning detection, solid-state drive supervision, and industrial PLC voltage monitoring requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for TPS3779DDRYT 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 focused on analog and embedded processing technologies, with decades of expertise in precision analog ICs and power management solutions.

The TPS37xx family was designed specifically for high-reliability, low-power dual-rail supervision in portable, medical, and industrial equipment - emphasizing accuracy, small form factor, and wide temperature operation.

FAQ

What is the function of the TPS3779DDRYT in a power-management system?

The TPS3779DDRYT serves as a dual-channel voltage supervisor that independently monitors two power rails (via SENSE1 and SENSE2) and asserts push-pull outputs (OUT1 and OUT2) to trigger reset or enable signals. Its role is to ensure system reliability by detecting undervoltage conditions with 1% accuracy and rejecting noise via built-in hysteresis - critical for preventing malfunction during power transients. The TPS3779DDRYT does not regulate voltage but provides deterministic, low-latency supervision essential for safe boot and runtime operation.

Does the TPS3779DDRYT require external pull-up resistors on its outputs?

No, the TPS3779DDRYT does not require external pull-up resistors because it features push-pull outputs (OUT1 and OUT2). These outputs actively drive high to the VDD rail voltage and low to GND, eliminating dependency on external components for logic-level definition. This simplifies design, reduces BOM count, and avoids potential issues with pull-up selection - unlike open-drain alternatives such as the TPS3780 series, which mandate external pull-ups. The TPS3779DDRYT's push-pull architecture is fully specified in TI's SBVS250 datasheet.

What is the minimum detectable voltage threshold for the TPS3779DDRYT?

The TPS3779DDRYT supports adjustable detection thresholds down to 1.2 V using external resistor dividers on SENSE1 and SENSE2. Its internal VIT+ threshold is factory-set to 1.182 V (±1%) for the 'D' hysteresis variant, and the input pins accept voltages from 0 V to 6.5 V regardless of VDD. This allows monitoring of modern low-voltage rails (e.g., 1.8 V, 1.2 V) while maintaining high accuracy - confirmed in Section 7.5 of the SBVS250 datasheet and validated across –40°C to 125°C.

How does temperature affect the threshold accuracy of the TPS3779DDRYT?

Temperature-induced VIT+ deviation for the TPS3779DDRYT is tightly controlled: ±0.4% maximum over –40°C to +125°C, with worst-case drift occurring at temperature extremes. Figure 3 in the SBVS250 datasheet shows VIT+ deviation remains within ±0.24% from 0°C to 80°C - well within the overall ±1% total accuracy specification. This stability is achieved via on-chip trimming and matched reference design, ensuring reliable reset behavior in automotive and industrial environments without external compensation.

Can the TPS3779DDRYT monitor two different supply voltages simultaneously?

Yes, the TPS3779DDRYT is explicitly designed to monitor two independent supply voltages simultaneously: SENSE1 and SENSE2 accept input voltages from 0 V to 6.5 V - independent of VDD - enabling direct or resistor-divider-based monitoring of disparate rails (e.g., 12 V analog and 1.2 V core). Each channel operates autonomously with dedicated outputs (OUT1/OUT2), supporting configurations like power sequencing, early warning + hard reset, or redundant supervision - as demonstrated in Figures 22 and 24 of the SBVS250 datasheet.