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Texas Instruments TPS3779DDBVT
- Part No.:
- TPS3779DDBVT
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
TPS3779DDBVT.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:639
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Product details
Overview
TPS3779DDBVT from Texas Instruments is a dual-channel, low-power, high-accuracy voltage detector IC with push-pull outputs, designed for precise monitoring of two independent supply rails in space-constrained systems. It operates from 1.5 V to 6.5 V, features ±1% VIT+ threshold accuracy over –40°C to 125°C, 1% factory-set hysteresis, and 2 µA typical quiescent current - enabling reliable reset generation in battery-powered microcontroller applications.
For engineers reviewing the TPS3779DDBVT datasheet, TPS3779DDBVT pinout, TPS3779DDBVT application, or TPS3779DDBVT equivalent, this page delivers verified functional specifications, validated dual-rail monitoring use cases, confirmed SOT23-6 package mapping, and real-world design meaning behind key parameters including VIT+ deviation vs. temperature, startup delay, and output drive capability.
Technical Context
The TPS3779DDBVT integrates two independent comparators with internal precision reference and fixed 1% hysteresis (VHYS = 1% × VIT+), ensuring noise immunity without external components. Each SENSE input accepts 0–6.5 V regardless of VDD, supporting rail-to-rail monitoring of disparate voltage domains.
Its push-pull outputs (OUT1/OUT2) drive high to VDD and low to GND without pull-up resistors, simplifying interface logic with MCUs and PMICs. 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
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Range | 1.5 V to 6.5 V - powers device across wide input range; supports direct connection to Li-ion, 3.3 V, and 5 V rails. |
| VIT+ Accuracy | ±1% over –40°C to 125°C - ensures stable reset assertion timing across automotive and industrial temperature extremes. |
| Hysteresis | 1% (TPS3779D variant) - rejects supply noise up to 12 mV on a 1.2 V rail, preventing false resets during transient dips. |
| Quiescent Current | 2 µA typical - enables multi-year operation in coin-cell–powered IoT sensors and portable medical devices. |
| Output Type | Push-pull (TPS3779 series) - eliminates need for external pull-ups, reducing BOM count and PCB footprint in MCU reset circuits. |
| Startup Delay | 570 µs - guarantees synchronized output assertion after power-on, critical for deterministic system initialization sequences. |
| Propagation Delay | 5.5 µs (tPD(r)), 10 µs (tPD(f)) - enables fast response to undervoltage events on sensitive digital loads like FPGAs and DSPs. |
Pinout & Package
SOT23-6 package (2.92 mm × 1.30 mm body size), surface-mount, lead-free, RoHS-compliant.
| 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 for stable operation. |
| 2 - OUT1 | Channel 1 push-pull output | Drives low to GND or high to VDD; directly interfaces with MCU reset inputs without external components. |
| 3 - SENSE2 | Channel 2 voltage sense input | Monitors second rail via external resistor divider; input bias current ≤15 nA minimizes divider error. |
| 4 - OUT2 | Channel 2 push-pull output | Independent reset signal for secondary domain (e.g., I/O supply or analog subsystem). |
| 5 - SENSE1 | Channel 1 voltage sense input | Configurable detection threshold down to 1.2 V; supports early-warning or primary supply monitoring. |
| 6 - GND | Ground reference | Common return path for VDD, SENSE inputs, and outputs; must be low-impedance for accurate threshold tracking. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent channels | Enables simultaneous monitoring of core and I/O rails - e.g., 1.2 V CPU + 3.3 V peripheral supply - with no shared timing constraints. |
| 1% factory-set hysteresis | Eliminates need for external hysteresis resistors; guarantees consistent noise margin across production units and temperature. |
| Adjustable threshold (down to 1.2 V) | Supports modern low-voltage SoCs and DDR memory supplies using simple resistor dividers with <1% total error. |
| –40°C to 125°C operation | Validated for under-hood automotive, industrial PLC, and outdoor edge-node deployments without derating. |
| 2 µA quiescent current | Reduces standby power by >90% versus legacy supervisors - critical for always-on battery-backed systems. |
Applications
| Microcontroller Power Sequencing | Portable Medical Sensor Node |
|---|---|
Use Scenario: Coordinating power-up of ARM Cortex-M4 MCU and its 1.8 V LDO-regulated analog front-end. IC Role / Device Role / Timing Role: TPS3779DDBVT asserts OUT1 when main 3.3 V rail reaches 3.2 V (VIT+), then OUT2 when 1.8 V rail reaches 1.75 V - enforcing safe sequencing order. Use Value: Prevents latch-up and undefined state during boot by guaranteeing analog supply stabilizes before MCU firmware executes. |
Use Scenario: Monitoring dual batteries (Li-SOCl₂ primary + supercap backup) in wearable ECG patch. IC Role / Device Role / Timing Role: TPS3779DDBVT uses SENSE1 to detect primary battery drop below 3.0 V (early warning), and SENSE2 to trigger hard reset at 2.5 V (critical undervoltage). Use Value: Extends usable runtime by 12% through staged power management while preserving data integrity during brownout. |
| Industrial PLC I/O Module | SSD Power-Rail Supervision |
Use Scenario: Ensuring 24 V field bus and 5 V logic rails remain within spec before enabling relay drivers and CAN transceivers. IC Role / Device Role / Timing Role: TPS3779DDBVT monitors 24 V via 10:1 divider on SENSE1 and 5 V directly on SENSE2; both OUTx drive enable pins of isolated DC-DC converters. Use Value: Eliminates risk of partial activation that could cause fieldbus communication faults or relay chatter during marginal supply conditions. |
Use Scenario: Validating 12 V and 3.3 V rails powering NAND flash controller and DRAM buffer in enterprise SSD. IC Role / Device Role / Timing Role: TPS3779DDBVT triggers immediate host reset (via OUT1) if 3.3 V drops below 3.14 V, and disables write operations (via OUT2) if 12 V falls below 11.4 V. Use Value: Prevents NAND corruption and DRAM bit errors during power transients - meeting JEDEC JESD22-A102 reliability requirements. |
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 |
|---|---|---|---|
| TPS3779DBVR | SOT23-6 package, same electrical specs, tape-and-reel packaging (3000 pcs/reel vs. 250 pcs for DDBVT) | Identical functionality; optimized for high-volume automated assembly rather than prototyping or low-quantity procurement | Select TPS3779DBVR for production runs requiring full reel delivery and lower unit cost. |
| TPS3780DDBVT | Same pinout and thresholds, but open-drain outputs (requires external pull-ups); higher Ilkg(OD) leakage (±250 nA at 125°C) | Enables level-shifting - e.g., monitoring 1.2 V rail while pulling OUTx to 3.3 V logic - not possible with TPS3779DDBVT's push-pull outputs | Choose TPS3780DDBVT only when interfacing with mixed-voltage systems where output logic levels must differ from VDD. |
Compared with TPS3779DDBVT, TPS3779DBVR offers identical performance in volume-optimized packaging, while TPS3780DDBVT trades push-pull simplicity for open-drain flexibility - making the former ideal for cost-sensitive production and the latter necessary only for level-shifted reset signaling.
Availability
TPS3779DDBVT is available at Aetrix Electronics and suitable for microcontroller power sequencing, portable medical sensor nodes, industrial PLC I/O modules, and SSD power-rail supervision requiring stable component supply and long-term lifecycle support.
Supply support for TPS3779DDBVT 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 engineered specifically for ultra-low-power, high-accuracy dual-rail supervision in space- and energy-constrained applications - targeting portable, automotive, and industrial end equipment where reliability and thermal stability are non-negotiable.
FAQ
What is the VIT+ threshold voltage tolerance of the TPS3779DDBVT over temperature?
The TPS3779DDBVT maintains ±1% VIT+ accuracy across –40°C to 125°C, with measured deviation bounded between –0.4% and +0.4% over temperature per the SBVS250 datasheet Figure 3. This tight tolerance ensures predictable reset behavior in automotive engine control units and industrial motor drives where ambient temperature swings exceed 100°C.
Does the TPS3779DDBVT require external pull-up resistors on its outputs?
No - the TPS3779DDBVT features push-pull outputs (OUT1 and OUT2), which actively drive high to VDD and low to GND. Unlike open-drain alternatives such as the TPS3780DDBVT, the TPS3779DDBVT eliminates the need for external pull-up resistors, reducing component count and board area in MCU reset circuits.
Can the TPS3779DDBVT monitor a 1.2 V supply rail directly?
Yes - the TPS3779DDBVT supports adjustable detection thresholds down to 1.2 V using an external resistor divider on SENSE1 or SENSE2. With its ±15 nA input bias current and 1% hysteresis, it achieves <0.5% total threshold error on a 1.2 V rail, making it suitable for supervising modern low-voltage SoCs and DDR5 memory supplies.
What is the startup delay specification for the TPS3779DDBVT?
The TPS3779DDBVT has a guaranteed startup delay of 570 µs after VDD crosses VDD(min) during power-on or recovery from brownout. This fixed delay ensures synchronized output assertion across both channels, preventing race conditions in systems where multiple voltage domains must stabilize before firmware execution begins.
How does the 1% hysteresis of the TPS3779DDBVT improve system reliability?
The 1% hysteresis in the TPS3779DDBVT creates a defined voltage window (e.g., 3.30 V rising / 3.27 V falling for a nominal 3.3 V rail) that prevents output oscillation during noisy or slowly recovering supply conditions. This eliminates false resets caused by ripple, load transients, or EMI - a critical requirement in medical and aerospace applications where reset integrity is safety-critical.
TPS3779DDBVT 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
TPS3779DDBVT FAQ
1.How can I place an order for TPS3779DDBVT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3779DDBVT 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 TPS3779DDBVT reliable?
The price and inventory of TPS3779DDBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3779DDBVT is usually 5 days.
3.What payment methods are accepted for TPS3779DDBVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3779DDBVT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS3779DDBVT?
TPS3779DDBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3779DDBVT 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 TPS3779DDBVT?
For technical support, including TPS3779DDBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3779DDBVT requirements.
6.How does Aetrix verify that TPS3779DDBVT is sourced from the original manufacturer or authorized distributors?
All TPS3779DDBVT 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 TPS3779DDBVT meets industry standards.
7.What is the process for return or replacement of TPS3779DDBVT?
All TPS3779DDBVT units undergo pre-shipment inspection (PSI). If there is an issue with TPS3779DDBVT, 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 TPS3779DDBVT part is unused and in its original packaging.
Return procedure for TPS3779DDBVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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