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Texas Instruments TPS3779BDBVT
- Part No.:
- TPS3779BDBVT
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
TPS3779BDBVT.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:288
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Product details
Overview
TPS3779BDBVT from Texas Instruments is a dual-channel, high-accuracy voltage detector with push-pull outputs, designed for precise monitoring of two independent supply rails in low-power systems. It features 5% factory-set 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 VDD. It is used in microcontroller reset supervision and power-supply sequencing where stable, glitch-immune detection is critical.
For engineers reviewing the TPS3779BDBVT datasheet, TPS3779BDBVT pinout, TPS3779BDBVT application, or TPS3779BDBVT equivalent, this page delivers verified electrical specifications, package mapping, functional context for dual-rail monitoring, and real-world design implications - all grounded in TI's SBVS250 datasheet and validated SOT23-6 implementation data.
Technical Context
The TPS3779BDBVT integrates two independent comparators with internal reference trimming, each supporting adjustable detection thresholds via external resistor dividers on SENSE1 and SENSE2. Its 5% hysteresis (VHYS = 5% × VIT+) ensures immunity to rail noise without external components, and its push-pull output architecture eliminates need for pull-up resistors while maintaining full VDD-referenced logic levels.
It enters normal operation after a 570 µs startup delay (tSD) once VDD exceeds 1.5 V, and asserts OUT1/OUT2 low when respective SENSE inputs fall below VIT– (e.g., 1.134 V at nominal VIT+ = 1.194 V). Threshold deviation remains within ±0.4% across –40°C to 120°C, confirmed by TI's production test data.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIT+ Threshold | 1.194 V (nominal); defines rising-edge detection point for both channels - sets minimum valid rail voltage before deassertion. |
| Hysteresis | 5% (factory-set); provides 60 mV voltage margin between VIT+ and VIT– (1.194 V → 1.134 V), preventing chatter during slow or noisy transitions. |
| Quiescent Current | 2 µA (typical at 3.3 V, 25°C); enables always-on monitoring in battery-powered devices with negligible impact on system runtime. |
| Supply Range | 1.5 V to 6.5 V; supports direct connection to Li-ion, 3.3 V, and 5 V rails without level-shifting or regulation. |
| Propagation Delay | tPD(r) = 5.5 µs (max), tPD(f) = 10 µs (max); ensures fast response to undervoltage events while maintaining noise rejection. |
| Operating Temp | –40°C to 125°C; qualified for automotive under-hood, industrial control, and high-reliability embedded applications. |
| Output Type | Push-pull (TPS3779 family); drives OUT1/OUT2 actively high/low - no external pull-ups required, simplifying BOM and layout. |
Pinout & Package
SOT23-6 package (2.92 mm × 1.30 mm body), thermally optimized for PCB space-constrained designs; pin 1 marked via dot or bevelled corner.
| 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 and outputs; must connect to low-impedance system ground plane. |
| 3 (SENSE2) | Second voltage monitor input | High-impedance (±15 nA bias) node; connects to resistor divider for rail monitoring - supports up to 6.5 V regardless of VDD. |
| 4 (OUT2) | Channel 2 push-pull output | Drives low when SENSE2 < VIT–, high when SENSE2 > VIT+; compatible with 3.3 V/5 V CMOS logic inputs without level shifters. |
| 5 (OUT1) | Channel 1 push-pull output | Independent reset/enable signal; asserted synchronously with SENSE1 crossing VIT–/VIT+, enabling dual-rail sequencing control. |
| 6 (SENSE1) | First voltage monitor input | Identical function to SENSE2; allows simultaneous monitoring of primary and auxiliary supplies (e.g., core + I/O rails). |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent comparators | Enables concurrent monitoring of two distinct voltage rails (e.g., 3.3 V and 1.8 V) with separate outputs - no shared timing or dependency. |
| 5% factory-trimmed hysteresis | Eliminates need for external hysteresis components; guarantees consistent noise margin across temperature and process variation. |
| Adjustable threshold down to 1.2 V | Supports detection of low-voltage rails (e.g., DDR memory supplies) using standard resistor dividers - no special references required. |
| 2 µA quiescent current | Reduces standby power in always-on supervisory circuits - critical for portable medical and battery-backed industrial sensors. |
| –40°C to 125°C operation | Validated performance across full automotive and industrial temperature range; no derating needed for thermal design. |
Applications
| Microcontroller Reset Supervision | Power-Supply Sequencing |
|---|---|
|
Use Scenario: Monitoring 3.3 V and 1.2 V rails powering an ARM Cortex-M7 MCU and its peripheral interface. IC Role / Device Role / Timing Role: TPS3779BDBVT asserts OUT1 on 3.3 V undervoltage and OUT2 on 1.2 V undervoltage, holding MCU in reset until both rails stabilize. Use Value: Prevents firmware corruption during brown-out by enforcing strict dual-rail power-good sequencing before release. |
Use Scenario: Controlling startup order of FPGA core (1.0 V) and I/O bank (2.5 V) supplies in a programmable logic system. IC Role / Device Role / Timing Role: TPS3779BDBVT monitors each rail independently and drives enable signals to corresponding DC/DC converters. Use Value: Ensures correct power-up sequence (I/O before core) without requiring complex timing controllers or discrete logic. |
| Early Warning Detection | Battery-Powered System Monitoring |
|
Use Scenario: Detecting gradual Li-ion battery discharge in a portable diagnostic device before critical cutoff. IC Role / Device Role / Timing Role: One channel monitors main 3.3 V rail (early warning at 3.0 V), second monitors backup 1.8 V rail (reset at 1.6 V). Use Value: Provides two-tier alerting - first output triggers low-battery warning, second initiates graceful shutdown. |
Use Scenario: Supervising dual batteries (primary + backup) in a wireless sensor node operating at 1.8 V and 3.0 V. IC Role / Device Role / Timing Role: TPS3779BDBVT continuously monitors both sources; OUT1 controls primary regulator, OUT2 enables backup switchover. Use Value: Enables seamless failover with zero software intervention - critical for unattended remote deployments. |
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 |
|---|---|---|---|
| TPS3779CDBVT | 10% hysteresis (vs. 5%); identical pinout, supply range, and quiescent current. | Better suited for noisy environments or slower-ramping rails where wider hysteresis prevents false triggering. | Select when higher noise immunity is prioritized over tighter threshold resolution. |
| TPS3780BDBVT | Open-drain outputs (vs. push-pull); same 5% hysteresis, threshold accuracy, and package. | Allows output pull-up to voltage independent of VDD (e.g., 5 V logic interface while VDD = 3.3 V). | Select when interfacing with mixed-voltage systems or wired-AND reset buses. |
Compared with TPS3779BDBVT, TPS3779CDBVT offers greater noise margin at the cost of reduced threshold precision, while TPS3780BDBVT trades push-pull simplicity for flexible voltage-level interfacing - both require no PCB changes but differ in system-level logic compatibility and noise handling trade-offs.
Availability
TPS3779BDBVT is available at Aetrix Electronics and suitable for microcontroller reset supervision, power-supply sequencing, and battery-powered system monitoring requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for TPS3779BDBVT 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 ICs.
The TPS37xx family was engineered specifically for high-accuracy, ultra-low-power voltage monitoring in space- and energy-constrained systems - targeting applications where reliability, thermal stability, and minimal BOM count are non-negotiable.
FAQ
What is the exact hysteresis value for TPS3779BDBVT?
The TPS3779BDBVT has a factory-trimmed hysteresis of 5%, meaning the difference between VIT+ and VIT– is exactly 5% of the nominal VIT+ threshold (1.194 V). This yields VIT– = 1.134 V and provides a fixed 60 mV noise margin - confirmed in TI's SBVS250 datasheet Table 5 and Figure 6.
Can TPS3779BDBVT monitor voltages higher than its VDD supply?
Yes. The SENSE1 and SENSE2 inputs of the TPS3779BDBVT accept voltages up to 6.5 V regardless of VDD level (1.5 V to 6.5 V), enabling direct monitoring of higher-voltage rails like 5 V or 3.3 V supplies even when powered from a lower 1.8 V source - a key feature documented in Section 6 and 7.3 of the datasheet.
What is the startup behavior of TPS3779BDBVT after power application?
Upon VDD ramp-up, the TPS3779BDBVT requires a 570 µs startup delay (tSD) before outputs respond to SENSE inputs. During this period, OUT1 and OUT2 remain in an undefined state. This delay is guaranteed across –40°C to 125°C and ensures reliable initialization after power-on or VDD transients below 1.5 V.
Does TPS3779BDBVT require external pull-up resistors on its outputs?
No. The TPS3779BDBVT features push-pull outputs (OUT1 and OUT2), which actively drive high and low states without external pull-ups. This reduces component count and board area versus open-drain alternatives like the TPS3780 series - a distinction explicitly called out in the "Features" and "Pin Functions" sections of the datasheet.
How accurate is the threshold voltage of TPS3779BDBVT over temperature?
The TPS3779BDBVT maintains ±1% VIT+ accuracy over –40°C to 125°C, with measured deviation bounded within ±0.4% across –40°C to 120°C per Figure 3 and Figure 4 in the SBVS250 datasheet. This stability is achieved via on-chip reference trimming and is validated across production lots - not a typical-only specification.
TPS3779BDBVT 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
TPS3779BDBVT FAQ
1.How can I place an order for TPS3779BDBVT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3779BDBVT 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 TPS3779BDBVT reliable?
The price and inventory of TPS3779BDBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3779BDBVT is usually 5 days.
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TPS3779BDBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3779BDBVT 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 TPS3779BDBVT?
For technical support, including TPS3779BDBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3779BDBVT requirements.
6.How does Aetrix verify that TPS3779BDBVT is sourced from the original manufacturer or authorized distributors?
All TPS3779BDBVT 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 TPS3779BDBVT meets industry standards.
7.What is the process for return or replacement of TPS3779BDBVT?
All TPS3779BDBVT units undergo pre-shipment inspection (PSI). If there is an issue with TPS3779BDBVT, 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 TPS3779BDBVT part is unused and in its original packaging.
Return procedure for TPS3779BDBVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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