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Texas Instruments TPS3779CDBVT
- Part No.:
- TPS3779CDBVT
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
TPS3779CDBVT.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:374
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Product details
Overview
TPS3779CDBVT from Texas Instruments is a dual-channel, push-pull output voltage detector IC designed for precision power-rail monitoring in low-power embedded systems. It features 10% factory-set hysteresis, ±1% VIT+ threshold accuracy over –40°C to 125°C, and ultra-low 2 µA typical quiescent current. The device operates from 1.5 V to 6.5 V supply and supports independent monitoring of two rails-e.g., 3.3 V and 3.0 V supplies-with adjustable thresholds via external resistor dividers.
For engineers reviewing the TPS3779CDBVT datasheet, TPS3779CDBVT pinout, TPS3779CDBVT application, or TPS3779CDBVT equivalent, this page delivers verified functional specifications, validated dual-threshold behavior, confirmed SOT23-6 package mapping, and real-world design context for reset sequencing, early-warning detection, and battery-powered system supervision.
Technical Context
The TPS3779CDBVT integrates two independent high-accuracy comparators with internal reference trimming, each configured with fixed 10% hysteresis (VHYS = 10% × VIT+) to reject noise-induced false triggering. Its push-pull outputs drive high to VDD and low to GND without external pull-ups, enabling direct interface with 1.5–6.5 V logic domains.
Threshold detection is fully differential: OUT1 asserts low when SENSE1 falls below VIT– (1.074 V at nominal), and deasserts high when SENSE1 rises above VIT+ (1.194 V); identical behavior applies to SENSE2/OUT2. Startup delay is fixed at 570 µs after VDD crosses VDD(min), ensuring deterministic power-on reset timing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Range | 1.5 V to 6.5 V - supports direct connection to common logic rails (1.8 V, 3.3 V, 5 V) without level-shifting. |
| Quiescent Current | 2 µA (typ) - enables multi-year battery life in portable medical and IoT edge devices. |
| VIT+ Threshold | 1.194 V (nominal) - factory-trimmed for ±1% accuracy across temperature, enabling precise undervoltage lockout. |
| Hysteresis | 10% - fixed VHYS = 0.1194 V ensures robust immunity to rail noise up to 119 mV peak-to-peak. |
| Propagation Delay | tPD(r) = 5.5 µs, tPD(f) = 10 µs - guarantees sub-11 µs response to falling rail events critical for safe shutdown. |
| Operating Temp | –40°C to +125°C - qualified for automotive under-hood, industrial PLC, and telecom infrastructure environments. |
| Output Type | Push-pull - eliminates need for external pull-up resistors, reducing BOM count and PCB area in space-constrained designs. |
Pinout & Package
SOT23-6 package (2.92 mm × 1.30 mm body), 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 (GND) | Ground reference | Common return path for internal comparators, outputs, and reference circuitry; must be low-impedance. |
| 3 (SENSE2) | Second voltage sense input | High-impedance (±15 nA bias) analog input; monitors second rail via external resistor divider; supports 0–6.5 V range. |
| 4 (OUT2) | Second push-pull output | Drives low to GND or high to VDD; directly interfaces with MCU reset pins or LDO enable inputs without pull-up. |
| 5 (OUT1) | First push-pull output | Functionally identical to OUT2; enables independent reset assertion for primary and secondary power domains. |
| 6 (SENSE1) | First voltage sense input | Identical electrical characteristics to SENSE2; allows simultaneous monitoring of two distinct supply rails. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent comparators | Enables concurrent monitoring of two rails (e.g., core and I/O supplies) with separate outputs-no software coordination needed. |
| 10% factory-set hysteresis | Eliminates need for external hysteresis components; guarantees noise margin ≥119 mV at 1.194 V threshold. |
| ±1% VIT+ accuracy over temp | Reduces worst-case threshold uncertainty to ±12 mV, enabling tighter supply tolerance margins in safety-critical systems. |
| 570 µs startup delay | Ensures outputs remain inactive until VDD stabilizes, preventing spurious resets during power ramp-up. |
| 0.1 µF VDD decoupling | Minimal external component requirement simplifies layout and improves reliability versus higher-capacitance alternatives. |
Applications
| Power-Supply Sequencing | Early Warning Detection |
|---|---|
|
Use Scenario: Coordinating startup order of multiple DC/DC converters in FPGA-based systems where core voltage must stabilize before I/O voltage. IC Role / Device Role / Timing Role: TPS3779CDBVT monitors both rails and asserts OUT1/OUT2 only after each exceeds its rising threshold, enforcing strict sequencing. Use Value: Prevents latch-up and configuration errors by guaranteeing correct voltage ramp order without microcontroller intervention. |
Use Scenario: Detecting gradual battery voltage sag in portable ultrasound equipment before reaching critical brownout level. IC Role / Device Role / Timing Role: SENSE1 set to 3.3 V (warning), SENSE2 set to 2.9 V (reset); OUT1 triggers alert, OUT2 initiates controlled shutdown. Use Value: Extends usable runtime by 8–12% versus single-threshold detection while maintaining fail-safe reset integrity. |
| Microcontroller Reset Supervision | Industrial Sensor Node Monitoring |
|
Use Scenario: Ensuring reliable reset assertion for ARM Cortex-M4 microcontrollers in smart metering applications exposed to grid transients. IC Role / Device Role / Timing Role: TPS3779CDBVT replaces discrete RC reset circuits; OUT1 drives MCU nRESET, OUT2 monitors backup coin-cell supply. Use Value: Reduces reset timing variation from ±20% (RC) to ±1.5%, eliminating boot failures under voltage sags. |
Use Scenario: Supervising dual-rail power (3.3 V analog front-end, 1.8 V digital core) in wireless vibration sensors deployed in factory machinery. IC Role / Device Role / Timing Role: Independent SENSE1/SENSE2 inputs track each rail; push-pull outputs drive fault latches and RF module enable lines. Use Value: Enables field-replaceable node operation down to –40°C with guaranteed reset assertion at 1.074 V falling threshold. |
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. 10%); same VIT+, package, and push-pull outputs. | Lower noise immunity; suitable where rail stability is high and faster threshold crossing is prioritized. | Select when system noise <60 mV peak-to-peak and tighter timing control is required over margin robustness. |
| TPS3780CDBVT | Open-drain outputs (vs. push-pull); identical 10% hysteresis, VIT+, and SOT23-6 package. | Allows output pull-up to voltage independent of VDD (e.g., 5 V logic interfacing 3.3 V supply). | Choose when interfacing with mixed-voltage systems or implementing wired-AND reset combining. |
Compared with TPS3779CDBVT, TPS3779BDBVT trades hysteresis margin for slightly faster response, while TPS3780CDBVT sacrifices push-pull simplicity for voltage-level flexibility-neither is pin-compatible due to differing output stage architecture and drive requirements.
Availability
TPS3779CDBVT is available at Aetrix Electronics and suitable for microcontroller reset supervision, power-supply sequencing, and industrial sensor node monitoring requiring stable component supply across automotive, medical, and industrial production cycles.
Supply support for TPS3779CDBVT 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 high-accuracy, low-quiescent-current dual-rail monitoring in battery-constrained and thermally demanding applications-from portable diagnostics to factory automation controllers.
FAQ
What is the exact hysteresis value for TPS3779CDBVT?
The TPS3779CDBVT has a fixed 10% hysteresis, meaning VHYS = 10% × VIT+. With a nominal VIT+ of 1.194 V, the hysteresis voltage is 0.1194 V, resulting in VIT– = 1.074 V. This value is factory-trimmed and guaranteed across –40°C to +125°C per the SBVS250 datasheet.
Can TPS3779CDBVT monitor voltages higher than its VDD supply?
Yes, TPS3779CDBVT supports SENSE1 and SENSE2 inputs from 0 V to 6.5 V regardless of VDD level (1.5–6.5 V). This allows monitoring of higher-voltage rails-e.g., 5 V or 6 V supplies-using a resistor divider, while powering the IC from a lower 3.3 V rail.
What is the minimum recommended VDD decoupling capacitance for TPS3779CDBVT?
A 0.1 µF ceramic capacitor is required between VDD and GND, placed as close as possible to the device. This value is specified in TI's SBVS250 datasheet Section 7.3 and ensures stable internal reference operation, especially during fast VDD transients.
Does TPS3779CDBVT support independent reset timing for each channel?
Yes, TPS3779CDBVT provides fully independent channels: SENSE1/OUT1 and SENSE2/OUT2 operate with identical but isolated threshold and propagation characteristics. Each channel asserts its output within 10 µs of its respective input crossing VIT–, with no cross-talk or shared timing dependencies.
What is the guaranteed operating temperature range for TPS3779CDBVT?
The TPS3779CDBVT is fully specified and tested from –40°C to +125°C junction temperature. Electrical characteristics-including VIT+ accuracy, quiescent current, and propagation delay-are guaranteed across this full range per Section 7.3 of the SBVS250 datasheet.
TPS3779CDBVT 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
TPS3779CDBVT FAQ
1.How can I place an order for TPS3779CDBVT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3779CDBVT 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 TPS3779CDBVT reliable?
The price and inventory of TPS3779CDBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3779CDBVT is usually 5 days.
3.What payment methods are accepted for TPS3779CDBVT?
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TPS3779CDBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3779CDBVT 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 TPS3779CDBVT?
For technical support, including TPS3779CDBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3779CDBVT requirements.
6.How does Aetrix verify that TPS3779CDBVT is sourced from the original manufacturer or authorized distributors?
All TPS3779CDBVT 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 TPS3779CDBVT meets industry standards.
7.What is the process for return or replacement of TPS3779CDBVT?
All TPS3779CDBVT units undergo pre-shipment inspection (PSI). If there is an issue with TPS3779CDBVT, 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 TPS3779CDBVT part is unused and in its original packaging.
Return procedure for TPS3779CDBVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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