Texas Instruments TPS3780BDBVR

Overview

TPS3780BDBVR from Texas Instruments is a dual-channel, open-drain voltage detector IC designed for precision rail monitoring in low-power systems. It features 5% hysteresis, ±1% VIT+ threshold accuracy over –40°C to 125°C, 2 µA typical quiescent current, and operates from 1.5 V to 6.5 V supply. It is used in power-supply sequencing and reset supervision for microcontrollers and SSDs.

For engineers reviewing the TPS3780BDBVR datasheet, TPS3780BDBVR pinout, TPS3780BDBVR application, or TPS3780BDBVR equivalent, key selection criteria include its adjustable detection down to 1.2 V via external resistor dividers, independent SENSE1/SENSE2 inputs with glitch immunity, open-drain outputs compatible with pull-up voltages up to 6.5 V, and µSON-6 package suitability for space-constrained portable designs.

Technical Context

The TPS3780BDBVR implements two independent high-accuracy comparators with internal reference trimming, where each SENSE input drives its corresponding open-drain output (OUT1/OUT2) based on crossing VIT+ (rising) or VIT– (falling) thresholds. Its 5% hysteresis option ensures noise immunity without external components.

It supports wide supply (1.5–6.5 V) and sense voltage (0–6.5 V) ranges, enabling monitoring of rails independent of VDD. Startup delay is fixed at 570 µs after VDD exceeds VDD(min), and propagation delays are 5.5 µs (rising) and 10 µs (falling) under nominal conditions.

Key Specifications

Pinout & Package

SOT23-6 package (2.92 mm × 1.30 mm), surface-mount, lead-free, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3780CDBVR and MAX6315US29D3+T, the TPS3780BDBVR uniquely balances 5% hysteresis for moderate noise immunity, dual independent channels in one SOT23-6 package, and resistor-adjustable thresholds-making it optimal for compact, multi-rail portable designs requiring precise, low-power supervision.

Availability

TPS3780BDBVR is available at Aetrix Electronics and suitable for microcontroller reset supervision, power-supply sequencing, early warning detection, and battery-powered medical sensor applications requiring stable component supply and long-term lifecycle support.

Supply support for TPS3780BDBVR 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 company specializing in analog and embedded processing technologies, with leadership in precision analog ICs and power management solutions.

The TPS37xx family was designed specifically for high-accuracy, ultra-low-power voltage monitoring in space-constrained and battery-operated systems, emphasizing threshold stability over temperature and minimal quiescent consumption.

FAQ

What is the hysteresis value of the TPS3780BDBVR?

The TPS3780BDBVR has a factory-set hysteresis of 5%, meaning the difference between its rising (VIT+) and falling (VIT–) detection thresholds is 5% of the nominal VIT+ voltage. This value is fixed and cannot be adjusted externally. The 5% hysteresis provides robust immunity to supply noise without requiring additional components, and is confirmed in TI's SBVS250 datasheet Device Comparison Table for part suffix 'B'.

Can the TPS3780BDBVR monitor voltages higher than its VDD supply?

Yes, the TPS3780BDBVR can monitor input voltages up to 6.5 V on SENSE1 and SENSE2 pins regardless of VDD, which may be as low as 1.5 V. This capability is explicitly specified in the Recommended Operating Conditions table (Section 7.3) and enables flexible rail monitoring-for example, using a 3.3 V VDD to supervise a 5 V system rail. The inputs are overvoltage-tolerant and do not require external clamping.

What is the minimum pull-up resistor value required for the TPS3780BDBVR outputs?

The TPS3780BDBVR does not specify a minimum pull-up resistor value, but recommends RPU between 1.5 kΩ and 10 MΩ per the Electrical Characteristics table (Section 7.3). For reliable low-level output (VOL ≤ 0.25 V at 0.4 mA sink), a 10 kΩ resistor is commonly used with 3.3 V pull-up. Lower values improve rise time but increase static current; higher values reduce current but risk slow edges in noisy environments.

Does the TPS3780BDBVR support operation at 125°C junction temperature?

Yes, the TPS3780BDBVR is fully specified and guaranteed to operate across –40°C to +125°C junction temperature, as stated in Section 7.3 (Recommended Operating Conditions) and validated in all Electrical Characteristics test conditions. Its ±1% VIT+ accuracy and 2 µA typical IDD hold over this full range, making it suitable for under-hood automotive and industrial control applications.

How does the startup delay of the TPS3780BDBVR affect system reset timing?

The TPS3780BDBVR has a fixed 570 µs startup delay (tSD) after VDD crosses VDD(min); during this period, outputs remain undefined. This delay ensures internal references and comparators stabilize before asserting valid reset signals. In system design, this means the TPS3780BDBVR will not release downstream reset until ≥570 µs after VDD reaches operational voltage-critical for synchronizing with slow-ramping power supplies in FPGA or DSP applications.