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Texas Instruments TPS3779ADBVT
- Part No.:
- TPS3779ADBVT
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
TPS3779ADBVT.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,680
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Product details
Overview
TPS3779ADBVT from Texas Instruments is a dual-channel, low-power, high-accuracy voltage detector IC with push-pull outputs, operating from 1.5 V to 6.5 V supply and featuring ±1% VIT+ threshold accuracy over –40°C to 125°C. It provides independent SENSE1/SENSE2 inputs with factory-set 1% hysteresis, 2 µA typical quiescent current, and fast 5.5 µs rising-edge propagation delay - used for precise power-rail monitoring in microcontroller reset supervision and power-supply sequencing.
For engineers reviewing the TPS3779ADBVT datasheet, TPS3779ADBVT pinout, TPS3779ADBVT application, or TPS3779ADBVT equivalent, this page delivers verified functional specifications, validated pin roles, confirmed thermal and timing behavior across temperature, and real-world dual-rail monitoring use cases - all grounded in TI's SBVS250 datasheet and official package documentation.
Technical Context
The TPS3779ADBVT integrates two independent comparators with internal precision reference and trimmed thresholds (VIT+ = 1.182 V, VIT– = 1.170 V for 1% hysteresis), enabling simultaneous detection of undervoltage events on separate rails. Its push-pull output architecture eliminates external pull-up resistors and ensures rail-to-rail logic compatibility with VDD.
Each SENSE input accepts 0–6.5 V regardless of VDD level, supports resistor-divider configuration down to 1.2 V detection, and includes built-in hysteresis to reject noise-induced false triggers - critical for stable reset assertion in battery-powered and industrial embedded systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Range | 1.5 V to 6.5 V - powers device across wide input rail range without external regulation |
| VIT+ Threshold | 1.182 V ±1% - factory-trimmed rising threshold enables accurate 1.2 V+ rail monitoring |
| Hysteresis | 1% - fixed internal hysteresis rejects up to ~11.8 mV of supply noise without external components |
| Quiescent Current | 2 µA (typ) at TJ = 25°C - enables multi-year operation in always-on battery-backed systems |
| tPD(r) | 5.5 µs max - ensures rapid response to rising rail conditions during power-up sequencing |
| Operating Temp | –40°C to +125°C - qualified for automotive under-hood and industrial control environments |
| Output Type | Push-pull - drives OUT1/OUT2 actively high/low; no pull-up required; compatible with CMOS/TTL loads |
Pinout & Package
TPS3779ADBVT is housed in a 6-pin SOT23-6 (DBV) package measuring 2.92 mm × 1.30 mm, optimized for space-constrained PCB layouts and reflow-compatible assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VDD | Power supply input | Accepts 1.5–6.5 V; requires 0.1 µF ceramic decoupling capacitor placed adjacent to pin |
| 2 - OUT1 | Channel 1 output | Push-pull; asserts low when SENSE1 < VIT–; deasserts high when SENSE1 > VIT+ |
| 3 - SENSE2 | Channel 2 voltage sense input | High-impedance (±15 nA); monitors rail via external resistor divider; accepts 0–6.5 V |
| 4 - OUT2 | Channel 2 output | Push-pull; functionally identical to OUT1 but independent; supports asynchronous dual-rail monitoring |
| 5 - SENSE1 | Channel 1 voltage sense input | Same electrical specs as SENSE2; enables differential or independent rail supervision |
| 6 - GND | Ground reference | Common return path for VDD, SENSE inputs, and output drivers; must be low-impedance |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent comparators | Enables concurrent monitoring of two distinct power rails (e.g., core and I/O supplies) without shared timing constraints |
| 1% factory-set hysteresis | Eliminates need for external hysteresis components while ensuring noise immunity up to 11.8 mV at 1.182 V threshold |
| 2 µA quiescent current | Reduces standby power in always-on systems - e.g., adds only ~0.015 mW at 3.3 V supply |
| 0–6.5 V SENSE input range | Allows direct monitoring of higher-voltage rails (e.g., 5 V, 3.3 V) using simple resistor dividers referenced to any VDD within spec |
| Push-pull outputs | Saves board space and BOM count by removing external pull-up resistors; supports direct interface to MCU reset pins |
Applications
| Microcontroller Reset Supervision | Power-Supply Sequencing |
|---|---|
Use Scenario: Monitoring 3.3 V and 1.8 V rails powering an ARM Cortex-M7 MCU and its peripheral interfaces during cold start and brownout conditions. IC Role / Device Role / Timing Role: TPS3779ADBVT asserts OUT1/OUT2 low independently when either rail falls below its VIT– threshold, holding MCU in reset until both rails stabilize above VIT+. Use Value: Prevents firmware corruption by enforcing strict power-good sequencing - validated with 5.5 µs tPD(r) and 10 µs tPD(f) timing margins. |
Use Scenario: Coordinating startup order of FPGA core (1.0 V), I/O bank (2.5 V), and auxiliary logic (3.3 V) in a programmable logic system. IC Role / Device Role / Timing Role: Each SENSE input configured via resistor divider to trigger at rail-specific thresholds; outputs drive enable pins of downstream DC/DC converters. Use Value: Achieves deterministic power-up sequence without FPGA configuration overhead - enabled by independent, glitch-immune channel operation. |
| Early Warning Detection | Battery-Powered Medical Device Monitoring |
Use Scenario: Detecting gradual 3.3 V rail droop in a portable ultrasound probe to initiate graceful shutdown before critical undervoltage occurs. IC Role / Device Role / Timing Role: SENSE1 set to 3.0 V (warning), SENSE2 set to 2.7 V (critical); OUT1 signals warning, OUT2 triggers hard reset. Use Value: Extends usable battery life by enabling predictive power management - supported by 1% threshold accuracy across full temperature range. |
Use Scenario: Supervising dual Li-ion cell stack (8.4 V nominal) and regulated 3.3 V system rail in a wearable ECG monitor. IC Role / Device Role / Timing Role: SENSE1 monitors battery voltage via divider; SENSE2 monitors regulated output; both outputs feed safety-critical watchdog logic. Use Value: Ensures fail-safe operation under low-battery and regulator fault conditions - validated with 125°C junction rating and <2 µA IDD. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel voltage detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3779BDBVT | 5% hysteresis (vs. 1% in TPS3779ADBVT); same pinout, package, and VDD/SENSE specs | Less immune to rail noise; suitable where tighter threshold tolerance is not required | Select when cost sensitivity outweighs need for ±1% accuracy in noisy environments |
| TPS3780ADBVT | Open-drain outputs (vs. push-pull); identical threshold, hysteresis, and quiescent current | Requires external pull-up resistors; enables level-shifting to higher-voltage logic domains (up to 6.5 V) | Choose when interfacing to mixed-voltage systems or implementing wired-AND reset combining |
Compared with TPS3779BDBVT, the TPS3779ADBVT offers tighter threshold control for noise-sensitive applications; compared with TPS3780ADBVT, it eliminates pull-up components and simplifies layout - making it optimal for compact, single-rail-voltage designs requiring minimal BOM count.
Availability
TPS3779ADBVT is available at Aetrix Electronics and suitable for microcontroller reset supervision, power-supply sequencing, and battery-powered medical device monitoring requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for TPS3779ADBVT 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 sensing and power integrity solutions.
The TPS37xx family was designed specifically for high-accuracy, ultra-low-power dual-rail voltage monitoring in space- and energy-constrained applications - including portable medical devices, industrial controllers, and automotive subsystems.
FAQ
What is the exact VIT+ threshold voltage for TPS3779ADBVT?
The TPS3779ADBVT has a factory-set positive-going input threshold (VIT+) of 1.182 V with ±1% accuracy over –40°C to +125°C, corresponding to its 1% hysteresis option. This value is trimmed and specified in TI's SBVS250 datasheet Section 7.5, Electrical Characteristics, and applies directly to both SENSE1 and SENSE2 inputs of the TPS3779ADBVT.
Does TPS3779ADBVT require external pull-up resistors on its outputs?
No, the TPS3779ADBVT features push-pull outputs (OUT1 and OUT2), which actively drive high and low without external pull-up resistors. This reduces BOM count and PCB area versus open-drain alternatives like the TPS3780ADBVT. The high-level output voltage is 0.8×VDD minimum at rated sink/source current, per the TPS3779ADBVT datasheet Section 7.5.
Can TPS3779ADBVT monitor voltages higher than its VDD supply?
Yes, the TPS3779ADBVT SENSE1 and SENSE2 inputs accept 0–6.5 V regardless of VDD level (1.5–6.5 V). This allows monitoring of higher-voltage rails - e.g., a 5 V supply while VDD = 3.3 V - using an external resistor divider. Input bias current is ±15 nA, minimizing divider error, as confirmed in the TPS3779ADBVT Electrical Characteristics table.
What is the startup delay (tSD) specification for TPS3779ADBVT?
The TPS3779ADBVT has a startup delay (tSD) of 570 µs after VDD crosses VDD(min) during power-on or recovery from brownout. During this period, outputs reflect input conditions only after the delay expires - ensuring stable reset assertion before system initialization. This parameter is measured and guaranteed per SBVS250 Section 7.6 and Figure 1.
Is TPS3779ADBVT compatible with the SOT23-6 footprint used by other TI voltage supervisors?
Yes, the TPS3779ADBVT uses the standard 6-pin SOT23-6 (DBV) package with 2.92 mm × 1.30 mm body size and 0.95 mm pitch, matching TI's industry-standard DBV footprint. Pinout is identical to TPS3779x/TPS3780x variants - enabling drop-in replacement within the same family when hysteresis and output type align, as documented in SBVS250 Section 6.
TPS3779ADBVT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- Adjustable/Selectable
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- -
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
TPS3779ADBVT FAQ
1.How can I place an order for TPS3779ADBVT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3779ADBVT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TPS3779ADBVT reliable?
The price and inventory of TPS3779ADBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3779ADBVT is usually 5 days.
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TPS3779ADBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3779ADBVT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TPS3779ADBVT?
For technical support, including TPS3779ADBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3779ADBVT requirements.
6.How does Aetrix verify that TPS3779ADBVT is sourced from the original manufacturer or authorized distributors?
All TPS3779ADBVT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TPS3779ADBVT meets industry standards.
7.What is the process for return or replacement of TPS3779ADBVT?
All TPS3779ADBVT units undergo pre-shipment inspection (PSI). If there is an issue with TPS3779ADBVT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TPS3779ADBVT part is unused and in its original packaging.
Return procedure for TPS3779ADBVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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