Texas Instruments TPS3780ADBVT

Overview

TPS3780ADBVT from Texas Instruments is a dual-channel, low-power, high-accuracy voltage detector IC with open-drain outputs, operating from 1.5 V to 6.5 V supply and supporting –40°C to 125°C ambient temperature. It features 1% threshold accuracy (VIT+ = 1.182 V), 1% hysteresis, and 2 µA typical quiescent current - enabling precise rail monitoring in battery-powered and space-constrained systems such as portable medical devices and SSD power sequencing.

For engineers reviewing the TPS3780ADBVT datasheet, TPS3780ADBVT pinout, TPS3780ADBVT application, or TPS3780ADBVT equivalent, this page delivers verified functional identity, confirmed SOT23-6 package mapping, validated dual-threshold behavior across temperature, and real-world design implications for reset assertion timing, pull-up resistor selection, and dual-rail monitoring architecture.

Technical Context

The TPS3780ADBVT implements two independent comparators with internal precision reference and factory-trimmed thresholds. Each SENSE input accepts 0–6.5 V regardless of VDD, enabling flexible rail monitoring across different voltage domains. Its open-drain outputs (OUT1/OUT2) support independent pull-up to up to 6.5 V - decoupling output logic level from VDD.

Threshold hysteresis is fixed at 1% (TPS3780D variant), providing noise immunity without external components. Startup delay is 570 µs after VDD crosses VDD(min), and propagation delays are 5.5 µs (rising) and 10 µs (falling), ensuring deterministic response to undervoltage events in microcontroller and FPGA reset circuits.

Key Specifications

Pinout & Package

SOT23-6 package (2.92 mm × 1.30 mm body), thermally enhanced for compact PCB layouts and high-density power management subsystems.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3780ADBVT, TPS3780DBVT trades threshold precision for stronger noise immunity, while TPS3779ADBVT simplifies BOM and layout at the cost of voltage-domain flexibility - making TPS3780ADBVT optimal for mixed-voltage, high-accuracy dual-rail supervision.

Availability

TPS3780ADBVT is available at Aetrix Electronics and suitable for portable medical devices, solid-state drives, and building automation systems requiring stable component supply, long-term lifecycle assurance, and guaranteed traceable sourcing.

Supply support for TPS3780ADBVT 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 power management technologies, with decades of expertise in precision analog ICs and industrial-grade reliability.

The TPS37xx family was designed specifically for high-accuracy, low-power voltage supervision in space- and energy-constrained applications - emphasizing factory-trimmed thresholds, wide temperature operation, and flexible output configurations.

FAQ

What is the exact hysteresis value for TPS3780ADBVT?

The TPS3780ADBVT is the "D" variant in the TPS3780 family and has a fixed 1% hysteresis. This means VIT– = VIT+ × (1 − 0.01) = 1.182 V × 0.99 = 1.170 V. The hysteresis is factory-trimmed and specified over –40°C to +125°C, eliminating need for external hysteresis resistors in the TPS3780ADBVT design.

Can TPS3780ADBVT monitor a 5 V rail while powered from 3.3 V?

Yes. The TPS3780ADBVT SENSE1 and SENSE2 inputs accept 0–6.5 V independent of VDD. With VDD = 3.3 V, you can monitor a 5 V rail using an external resistor divider (e.g., R1 = 511 kΩ, R2 = 332 kΩ) to scale 5 V down to ~1.182 V at the SENSE pin - and still use open-drain outputs pulled up to 5 V for compatibility with 5 V logic.

What pull-up resistor value is recommended for TPS3780ADBVT OUT1/OUT2?

For TPS3780ADBVT, a 10 kΩ pull-up resistor is recommended when driving 3.3 V logic with VOL ≤ 0.25 V at 0.4 mA sink current. At 6.5 V pull-up, values up to 100 kΩ maintain valid logic-high levels due to <250 nA leakage. The exact value depends on rise time requirements and bus capacitance - consult the Electrical Characteristics table for Ilkg(OD) and VOL vs. ISINK data.

Does TPS3780ADBVT require an input capacitor on the SENSE pins?

No. The TPS3780ADBVT SENSE inputs have ultra-low bias current (±15 nA), so external filtering capacitors are not required for basic operation. However, in high-noise environments (e.g., motor drives or switching regulators), a 1–10 nF ceramic capacitor placed close to each SENSE pin reduces susceptibility to fast transients - as noted in TI's SLVA450 application report referenced in the TPS3780ADBVT datasheet.

How does the 570 µs startup delay affect system reset timing in TPS3780ADBVT?

The 570 µs startup delay in TPS3780ADBVT ensures that OUT1 and OUT2 remain inactive until VDD has stabilized above VDD(min) for that duration - preventing premature deassertion of reset during power ramp-up. This delay is fixed and occurs only once per power-on or deep brownout recovery event, making TPS3780ADBVT suitable for deterministic reset sequencing in microcontrollers and FPGAs.