Texas Instruments TPS3780DDRYR

Overview

TPS3780DDRYR from Texas Instruments is a dual-channel, open-drain voltage detector IC designed for precision rail monitoring in low-power systems. It features 1% threshold accuracy (VIT+ = 1.182 V), 1% hysteresis, 2 µA typical quiescent current, and operates across 1.5 V to 6.5 V supply and –40°C to 125°C. It is used in power-supply sequencing to assert reset signals when two independent rails fall below programmable thresholds.

For engineers reviewing the TPS3780DDRYR datasheet, TPS3780DDRYR pinout, TPS3780DDRYR application, or TPS3780DDRYR equivalent, this page delivers verified electrical specs, µSON-6 package details, dual-sense timing behavior, and real-world implementation guidance for battery-powered and industrial embedded designs.

Technical Context

The TPS3780DDRYR implements two independent high-accuracy comparators with internal reference trimming-each with rising threshold (VIT+) and falling threshold (VIT–) separated by factory-set 1% hysteresis. Its SENSE1/SENSE2 inputs accept voltages up to 6.5 V regardless of VDD level, enabling flexible resistor-divider-based rail monitoring across disparate voltage domains.

Both outputs (OUT1, OUT2) are open-drain with 6.5 V absolute maximum pull-up capability independent of VDD, supporting mixed-voltage interface logic. 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

TPS3780DDRYR is housed in a 1.45 mm × 1.00 mm, 6-pin µSON (DRY) package with wettable flanks for automated optical inspection. Thermal resistance RθJA is 306.7°C/W, requiring minimal PCB copper for thermal management in space-constrained designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3780DBVR, TPS3780DDRYR saves 68% board area and suits ultra-compact wearables; compared with TPS3779DDRYR, it enables flexible level-shifting but adds two 10-kΩ pull-up resistors-critical for interoperability in heterogeneous voltage systems.

Availability

TPS3780DDRYR is available at Aetrix Electronics and suitable for power-supply sequencing, early-warning monitoring, solid-state drive power management, and industrial PLC I/O supervision requiring stable component supply across automotive and industrial temperature ranges.

Supply support for TPS3780DDRYR 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 delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, precision, and low-power innovation.

The TPS37xx family was engineered specifically for high-accuracy, dual-rail voltage supervision in space- and power-constrained applications-including portable medical devices, SSDs, and industrial automation systems.

FAQ

What is the exact VIT+ threshold voltage for TPS3780DDRYR and how is it specified?

The TPS3780DDRYR has a nominal VIT+ threshold of 1.182 V with ±1% accuracy over –40°C to +125°C. This value corresponds to the "D" variant in the TPS3780 family (1% hysteresis), confirmed in Section 7.5 of the SBVS250 datasheet. The threshold is factory-trimmed and applies identically to both SENSE1 and SENSE2 inputs under recommended operating conditions (VDD = 1.5–6.5 V).

Does TPS3780DDRYR require external pull-up resistors on its outputs, and why?

Yes, TPS3780DDRYR requires external pull-up resistors on both OUT1 and OUT2 because it features open-drain outputs. As stated in the Pin Functions table (Section 6), a pull-up resistor is mandatory to establish a defined logic-high state. The datasheet specifies RPU between 1.5 kΩ and 10 MΩ, with typical values near 10 kΩ selected based on sink current (≤5 mA) and VOL (≤0.25 V at 0.4 mA).

Can TPS3780DDRYR monitor voltage rails higher than its VDD supply voltage?

Yes, TPS3780DDRYR can monitor rails up to 6.5 V on SENSE1 and SENSE2 regardless of VDD level (1.5–6.5 V). Section 8.3.1 explicitly states comparator inputs swing from ground to 6.5 V independent of VDD. This enables use cases like monitoring a 5 V rail while powering the TPS3780DDRYR from a 1.8 V LDO-eliminating need for level shifters.

What is the startup behavior of TPS3780DDRYR during power-on?

Upon power-on, TPS3780DDRYR enters a 570 µs startup delay (tSD) after VDD crosses VDD(min), as defined in Section 7.6. During this period, outputs remain in an undefined state. After tSD expires, outputs respond dynamically to SENSE input levels. This behavior prevents premature reset assertion during supply ramp and is guaranteed across temperature and voltage ranges.

How does hysteresis work in TPS3780DDRYR and what is its design impact?

TPS3780DDRYR implements 1% hysteresis between VIT+ (1.182 V) and VIT– (1.170 V), meaning the falling threshold is 1.2 mV lower than the rising threshold. This built-in hysteresis rejects noise-induced false triggering on monitored rails-as validated in Figure 16's transient duration vs. overdrive curves-and eliminates need for external RC networks or software debouncing.