Texas Instruments TPS3780ADBVR

Overview

TPS3780ADBVR 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 factory-set 1% hysteresis (TPS3780D variant), ±1% VIT+ threshold accuracy over temperature, 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 TPS3780ADBVR datasheet, TPS3780ADBVR pinout, TPS3780ADBVR application, or TPS3780ADBVR equivalent, this page delivers verified functional specifications, validated SOT23-6 pin mapping, confirmed dual-rail monitoring use cases, and two technically documented alternative parts for system-level voltage supervision design.

Technical Context

The TPS3780ADBVR implements two independent precision comparators with internal reference trimming, each driving an open-drain output (OUT1/OUT2) that asserts low when its respective SENSE input falls below VIT– and deasserts high when rising above VIT+. Thresholds are adjustable via external resistor dividers, with VIT+ = 1.182 V (nominal) and hysteresis fixed at 1% of VIT+, yielding VIT– = 1.170 V.

Its open-drain architecture allows OUT1/OUT2 to be pulled up to voltages up to 6.5 V - independent of VDD - enabling level-shifting across disparate logic domains. 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 typical conditions.

Key Specifications

Pinout & Package

SOT23-6 package (2.92 mm × 1.30 mm), thermally optimized for PCB space-constrained designs with standard pick-and-place compatibility.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3780ADBVR, TPS3780BDBVR trades threshold precision for enhanced noise margin, while TPS3779DDBVR simplifies layout at the expense of voltage-domain flexibility - making TPS3780ADBVR optimal for mixed-voltage, accuracy-critical, low-power supervision.

Availability

TPS3780ADBVR is available at Aetrix Electronics and suitable for portable medical devices, solid-state drive power sequencing, and building automation sensors requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for TPS3780ADBVR 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 designed specifically for ultra-low-power, high-accuracy dual-rail voltage supervision in space- and energy-constrained applications - emphasizing factory-trimmed thresholds, minimal quiescent current, and flexible output architectures.

FAQ

What is the exact VIT+ threshold voltage of the TPS3780ADBVR?

The TPS3780ADBVR has a nominal positive-going input threshold (VIT+) of 1.182 V, with ±1% accuracy over the full –40°C to +125°C temperature range and 1.5 V to 6.5 V supply voltage. This value is factory-trimmed and applies to both SENSE1 and SENSE2 inputs under recommended operating conditions.

Does the TPS3780ADBVR require external pull-up resistors on its outputs?

Yes, the TPS3780ADBVR uses open-drain outputs (OUT1 and OUT2), so external pull-up resistors are mandatory for proper logic-high assertion. The datasheet specifies a recommended range of 1.5 kΩ to 10 kΩ, and outputs can be pulled up to voltages up to 6.5 V - independent of the VDD supply voltage.

Can the TPS3780ADBVR 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. This allows the TPS3780ADBVR to monitor higher-voltage rails (e.g., 5 V or 12 V) using an external resistor divider, while being powered from a lower VDD (e.g., 3.3 V or 1.8 V), with no risk of input damage.

What is the startup behavior of the TPS3780ADBVR during power-on?

Upon VDD crossing the minimum operating voltage (VDD(min)), the TPS3780ADBVR enters a 570 µs startup delay before outputs respond to SENSE inputs. During this period, outputs remain in a high-impedance state. This ensures internal references stabilize before asserting reset or enable signals - preventing premature system initialization.

How does the 1% hysteresis of the TPS3780ADBVR affect its undervoltage detection window?

The 1% hysteresis sets the difference between VIT+ (1.182 V) and VIT– (1.170 V), resulting in a 12 mV detection window. This narrow hysteresis provides precise trip-point control ideal for stable rails, while still rejecting brief transients shorter than 10 µs - balancing accuracy and noise immunity for low-noise applications.