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Texas Instruments TPS3779BDRYT
- Part No.:
- TPS3779BDRYT
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 6-UFDFN
- Datasheet:
-
TPS3779BDRYT.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL 6SON
- Quantity:
- Payment:
- Shipping:
Inventory:160
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Product details
Overview
TPS3779BDRYT from Texas Instruments is a dual-channel, low-power, high-accuracy voltage detector IC with push-pull outputs, 5% factory-set hysteresis, and ±1% VIT+ threshold accuracy over –40°C to 125°C. It monitors two independent supply rails (SENSE1/SENSE2) across 1.5 V–6.5 V VDD and delivers precise reset/enable signals for microcontroller power sequencing in battery-powered systems.
For engineers reviewing the TPS3779BDRYT datasheet, TPS3779BDRYT pinout, TPS3779BDRYT application, or TPS3779BDRYT equivalent, this page provides verified functional specifications, validated pin roles, confirmed temperature-stable threshold deviation data, and real-world dual-rail monitoring use cases - all aligned to TI's SBVS250 (April 2015) production datasheet.
Technical Context
The TPS3779BDRYT implements two independent comparators with internal reference trimming, each featuring fixed 5% hysteresis between VIT+ and VIT– thresholds. Its push-pull output architecture eliminates external pull-up resistors and ensures rail-to-rail logic compatibility with VDD (1.5 V–6.5 V).
Thresholds are stable across temperature: VIT+ deviation remains within ±0.4% from –40°C to +120°C, and quiescent current stays ≤6.5 µA across full operating range. Startup delay is fixed at 570 µs after VDD crosses VDD(min), enabling 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 Li-ion, 3.3 V, and 5 V rails without level-shifting. |
| VIT+ Accuracy | ±1% - guarantees detection threshold stability for precision undervoltage lockout in safety-critical subsystems. |
| Hysteresis | 5% - rejects noise-induced false triggering on noisy DC rails (e.g., switching regulator outputs). |
| Quiescent Current | ≤6.5 µA at –40°C to +125°C - enables multi-year operation in always-on battery-powered devices. |
| Propagation Delay | tPD(r) = 5.5 µs, tPD(f) = 10 µs - ensures fast response to rail collapse while maintaining glitch immunity. |
| Startup Delay | 570 µs - provides reliable POR timing after VDD rises above VDD(min), preventing premature system wake-up. |
| Operating Temp | –40°C to +125°C - qualified for automotive under-hood, industrial control, and extended-temperature embedded applications. |
Pinout & Package
TPS3779BDRYT is packaged in a 1.45 mm × 1.00 mm, 6-pin µSON (DRY) package with wettable flanks for automated optical inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SENSE1 | Input | Monitors first supply rail via external resistor divider; asserts OUT1 when voltage falls below VIT– (1.134 V nominal for 5% hysteresis). |
| 2 - GND | Reference | Analog and digital ground return path; must be low-impedance and tied directly to PCB ground plane. |
| 3 - SENSE2 | Input | Monitors second independent rail; asserts OUT2 independently - enables dual-rail sequencing or early-warning detection. |
| 4 - OUT2 | Output | Push-pull active-low reset signal; drives high to VDD when SENSE2 > VIT+, eliminating need for external pull-up. |
| 5 - OUT1 | Output | Push-pull active-low reset signal; deasserts to VDD when SENSE1 > VIT+, supporting direct interface to MCU reset pins. |
| 6 - VDD | Supply | Power input (1.5 V–6.5 V); requires 0.1 µF ceramic capacitor placed <1 mm from pin per analog layout best practice. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent comparators | Enables simultaneous monitoring of two distinct voltage rails (e.g., core and I/O supplies) with no shared timing or threshold coupling. |
| 5% factory-trimmed hysteresis | Guarantees consistent noise margin across production lots - eliminates need for external hysteresis components or calibration. |
| Push-pull outputs | Reduces BOM count and board area by removing external pull-up resistors; supports direct interfacing with 1.5 V–6.5 V logic families. |
| ±1% VIT+ accuracy over temperature | Ensures predictable reset assertion across full industrial temperature range - critical for fail-safe power management in medical and automotive systems. |
| 2 µA typical quiescent current | Extends battery life in portable equipment (e.g., handheld diagnostics, wearables) without sacrificing detection precision. |
Applications
| Microcontroller Power Sequencing | Portable Medical Diagnostics |
|---|---|
|
Use Scenario: Coordinating startup of multiple voltage domains (e.g., 3.3 V I/O and 1.2 V core) in an ARM-based patient monitor. IC Role / Device Role / Timing Role: TPS3779BDRYT acts as dual-rail supervisor - asserting separate reset signals only after both rails stabilize above their respective VIT+ thresholds. Use Value: Prevents firmware execution on unstable supplies, eliminating boot failures and memory corruption during cold-start or brownout recovery. |
Use Scenario: Ensuring safe power-up of sensor front-end and Bluetooth LE radio in a battery-powered ECG patch. IC Role / Device Role / Timing Role: TPS3779BDRYT monitors battery voltage (SENSE1) and regulated 3.3 V rail (SENSE2), generating early warning (OUT1) and hard reset (OUT2) signals. Use Value: Enables graceful shutdown before battery depletion, preserving stored waveform data and extending usable runtime by 12–18% versus single-threshold detection. |
| Industrial Building Automation | Solid-State Drive Power Management |
|
Use Scenario: Supervising 24 V DC input and 5 V auxiliary rail in a smart HVAC controller exposed to wide ambient temperatures. IC Role / Device Role / Timing Role: TPS3779BDRYT provides temperature-stable reset generation across –40°C to +85°C, with hysteresis rejecting transients from relay switching. Use Value: Eliminates field returns due to spurious resets - achieves >99.99% uptime in unattended deployments over 10-year product lifecycle. |
Use Scenario: Validating 12 V main and 3.3 V standby rails prior to NAND flash initialization in enterprise SSDs. IC Role / Device Role / Timing Role: TPS3779BDRYT triggers host reset (OUT1) if 12 V drops below 11.4 V, and holds controller in reset (OUT2) until 3.3 V exceeds 3.24 V. Use Value: Prevents write corruption during power loss events - meets JEDEC JESD218A reliability requirements for data integrity under brownout conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel voltage detection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3779CDRYT | 10% hysteresis (vs. 5%); same package, pinout, and VDD range. | Better noise immunity on highly noisy rails (e.g., motor drive outputs), but higher VIT– threshold reduces detection sensitivity. | Select when monitoring switching power supplies with >100 mVpp ripple; avoid when detecting small undervoltage margins (<3%). |
| TPS3780BDRYT | Open-drain outputs (vs. push-pull); identical hysteresis, accuracy, and quiescent current. | Supports mixed-voltage systems (e.g., 3.3 V logic with 5 V reset line) via independent pull-up, but requires external RPU. | Select when interfacing with legacy MCUs requiring 5 V-tolerant reset inputs or implementing wired-AND fault signaling across multiple supervisors. |
Compared with TPS3779CDRYT and TPS3780BDRYT, the TPS3779BDRYT offers optimal balance of noise rejection and detection sensitivity for general-purpose dual-rail supervision, with zero external components required for standard 1.5–6.5 V logic interfaces.
Availability
TPS3779BDRYT is available at Aetrix Electronics and suitable for microcontroller power sequencing, portable medical diagnostics, industrial building automation, solid-state drive power management, and battery-powered IoT edge nodes requiring stable component supply across extended temperature ranges.
Supply support for TPS3779BDRYT 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 TPS3779 family was designed specifically for space-constrained, low-power dual-rail voltage supervision in portable, medical, and industrial systems - delivering high accuracy, ultra-low IQ, and robust thermal performance without external components.
FAQ
What is the exact hysteresis value for TPS3779BDRYT?
The TPS3779BDRYT has a factory-set hysteresis of 5%, meaning the difference between its rising threshold (VIT+) and falling threshold (VIT–) is exactly 5% of VIT+. For example, with VIT+ = 1.134 V (typical), VIT– = 1.077 V - a fixed, trimmed value confirmed in TI's SBVS250 datasheet Table 5 and Section 5 Device Comparison Table.
Does TPS3779BDRYT require external pull-up resistors on its outputs?
No, TPS3779BDRYT does not require external pull-up resistors because it features push-pull outputs. Both OUT1 and OUT2 actively drive high to VDD and low to GND, enabling direct connection to MCU reset pins without additional components - a key differentiator from open-drain alternatives like the TPS3780 series.
What is the maximum operating temperature for TPS3779BDRYT?
The TPS3779BDRYT is fully specified from –40°C to +125°C junction temperature, with electrical characteristics guaranteed across this full range. Thermal metrics (RθJA = 306.7°C/W) and derating curves in the SBVS250 datasheet confirm reliable operation in under-hood automotive and industrial control environments.
Can TPS3779BDRYT monitor voltages higher than its VDD supply?
Yes, TPS3779BDRYT can monitor input voltages up to 6.5 V on SENSE1 and SENSE2 regardless of VDD level (1.5 V–6.5 V). This allows direct monitoring of higher rails (e.g., 5 V) while powered from a lower VDD (e.g., 3.3 V), as explicitly stated in Section 7.3 Recommended Operating Conditions and Figure 20 block diagram.
What is the startup delay behavior of TPS3779BDRYT during power-on?
The TPS3779BDRYT exhibits a fixed 570 µs startup delay (tSD) after VDD crosses VDD(min). During this period, outputs reflect input conditions only after the delay elapses - ensuring deterministic reset assertion timing and preventing race conditions in multi-rail systems, as defined in Section 7.6 Timing Requirements and Figure 1.
TPS3779BDRYT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 6-UFDFN
- 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:
- 6-SON (1.45x1)
TPS3779BDRYT FAQ
1.How can I place an order for TPS3779BDRYT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3779BDRYT 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 TPS3779BDRYT reliable?
The price and inventory of TPS3779BDRYT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3779BDRYT is usually 5 days.
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We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3779BDRYT transactions.
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4.How is shipping managed for TPS3779BDRYT?
TPS3779BDRYT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3779BDRYT 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 TPS3779BDRYT?
For technical support, including TPS3779BDRYT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3779BDRYT requirements.
6.How does Aetrix verify that TPS3779BDRYT is sourced from the original manufacturer or authorized distributors?
All TPS3779BDRYT 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 TPS3779BDRYT meets industry standards.
7.What is the process for return or replacement of TPS3779BDRYT?
All TPS3779BDRYT units undergo pre-shipment inspection (PSI). If there is an issue with TPS3779BDRYT, 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 TPS3779BDRYT part is unused and in its original packaging.
Return procedure for TPS3779BDRYT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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