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Texas Instruments TPS3809I50DBVT
- Part No.:
- TPS3809I50DBVT
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TPS3809I50DBVT.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,347
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Product details
Overview
TPS3809I50DBVT from Texas Instruments is a 3-pin SOT-23 precision supply voltage supervisor IC designed for power-on reset and brownout detection in processor-based systems. It features a fixed 4.55 V threshold voltage (VIT–), 200 ms reset delay (td), 9 μA typical supply current, push-pull active-low RESET output, and operates across –40°C to +85°C. It is used in industrial servers and building automation systems requiring reliable, low-power supply monitoring.
For engineers reviewing the TPS3809I50DBVT datasheet, TPS3809I50DBVT pinout, TPS3809I50DBVT application, or TPS3809I50DBVT equivalent, key selection criteria include its 4.55 V trip point, 200 ms delay timing, SOT-23 (DBV) package compatibility, and direct functional alignment with MAX809-class supervisory circuits in embedded power sequencing designs.
Technical Context
The TPS3809I50DBVT integrates an internal 1.137 V reference, comparator, timer, and push-pull output stage to generate a precise, temperature-stable reset signal. Its threshold is set by an internal resistor divider, delivering ±1.1% accuracy over temperature (4.45 V to 4.65 V).
During power-up, RESET asserts when VDD exceeds 1.1 V and remains active until VDD rises above 4.55 V, after which a 120–280 ms delay ensures clean system initialization. On undervoltage, RESET reasserts immediately upon VDD falling below the threshold, with 60 mV hysteresis preventing chatter.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 6 V - supports wide-input systems including 3.3 V and 5 V rails without external regulation |
| Threshold Voltage (VIT–) | 4.55 V (typical), 4.45–4.65 V (min/max) - precisely targets 5 V supply monitoring with ±1.1% tolerance |
| Reset Delay Time (td) | 200 ms (typical), 120–280 ms (min/max) - ensures sufficient hold time for DSP/processor boot sequence completion |
| Supply Current (IDD) | 9 μA (typical) at 2 V - enables ultra-low-power operation in battery-backed or energy-sensitive applications |
| Output Type | Push-pull, active-low RESET - eliminates need for external pull-up resistor and supports direct MCU reset input |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments including factory automation and building control systems |
| Threshold Hysteresis | 60 mV - prevents oscillation during slow-rising or noisy supply transitions near trip point |
Pinout & Package
SOT-23 (DBV) package, 2.90 mm × 1.60 mm body size, 1.45 mm max height, 3-pin surface-mount configuration with GND on Pin 1, RESET on Pin 2, and VDD on Pin 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Ground reference | Low-impedance connection required; serves as return path for internal comparator and output stage |
| RESET | Active-low reset output | Push-pull driver capable of sinking 5 mA; asserts low during power-up and undervoltage events |
| VDD | Supply input | Monitored rail input; requires 0.1 µF ceramic bypass capacitor to ground for stable threshold performance |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 4.55 V threshold | Enables accurate 5 V supply supervision without external resistors or trimming components |
| 200 ms programmable delay | Guarantees full processor core and memory initialization before release of reset signal |
| 9 μA typical quiescent current | Minimizes standby power draw in always-on industrial controllers and metering devices |
| Push-pull RESET output | Eliminates external pull-up requirement and reduces BOM count in space-constrained PCB layouts |
| –40°C to +85°C operation | Validated for deployment in uncontrolled ambient environments such as factory floors and outdoor building nodes |
Applications
| Factory Automation | Building Automation |
|---|---|
Use Scenario: PLC I/O modules and motor drive controllers require deterministic reset behavior during AC line fluctuations or brownouts. IC Role / Device Role / Timing Role: TPS3809I50DBVT monitors the 5 V logic rail and asserts RESET until stable voltage is confirmed, then delays deassertion for 200 ms. Use Value: Prevents spurious microcontroller execution during unstable power conditions, ensuring safe state recovery in safety-critical motion control. |
Use Scenario: HVAC controllers and smart lighting gateways operate continuously in variable-temperature environments with intermittent power. IC Role / Device Role / Timing Role: TPS3809I50DBVT provides cold-start reset and brownout protection for ARM-based edge nodes powered from 5 V SMPS supplies. Use Value: Maintains system integrity across thermal cycling and grid instability, reducing field failures in distributed building management networks. |
| Servers | Electricity Meters |
Use Scenario: Rack-mounted server baseboard management controllers (BMC) demand robust power sequencing during hot-swap events. IC Role / Device Role / Timing Role: TPS3809I50DBVT supervises the 5 V standby rail and triggers hardware reset if voltage sags below 4.55 V during power transition. Use Value: Enables fail-safe BMC reboot without firmware intervention, improving uptime and remote manageability. |
Use Scenario: Revenue-grade electricity meters must retain calibration and secure boot integrity despite utility grid transients. IC Role / Device Role / Timing Role: TPS3809I50DBVT guards the 5 V microcontroller supply and initiates controlled shutdown/reset when mains-derived rail drops. Use Value: Preserves metrology accuracy and cryptographic key state during short interruptions, meeting IEC 62053 compliance requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supply voltage supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV809E50DBVR | Same 4.55 V threshold, identical SOT-23 pinout, 200 ms delay, but lower 3.5 μA supply current and improved –40°C to +125°C rating | Preferred for extended-temperature industrial designs where thermal margin exceeds +85°C | Select TLV809E50DBVR when operating above 85°C or when ultra-low quiescent current is critical |
| MAX809SEUR+T | 4.63 V threshold (±2.5%), 140 ms min delay, 12 μA supply current, same SOT-23-3 package and pinout | Used in legacy designs requiring drop-in replacement with relaxed accuracy and timing specs | Choose MAX809SEUR+T only for cost-sensitive, non-critical applications where 4.63 V trip and 140 ms delay are acceptable |
Compared with TPS3809I50DBVT, TLV809E50DBVR offers superior temperature range and lower current but shares identical functionality and footprint, while MAX809SEUR+T trades accuracy and delay consistency for broader legacy compatibility at higher power cost.
Availability
TPS3809I50DBVT is available at Aetrix Electronics and suitable for factory automation, building automation, and electricity metering applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for TPS3809I50DBVT 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 experience in high-reliability industrial and automotive IC design.
The TPS3809 family is part of TI's precision supervisory circuit portfolio, engineered specifically for deterministic power-on reset and brownout detection in DSP, MCU, and FPGA-based systems demanding low power and tight voltage thresholds.
FAQ
What is the exact threshold voltage of the TPS3809I50DBVT?
The TPS3809I50DBVT has a nominal negative-going input threshold voltage (VIT–) of 4.55 V, with a guaranteed range of 4.45 V to 4.65 V over the full –40°C to +85°C operating temperature range. This value is factory-trimmed and fixed internally-no external components are needed to set or adjust it.
Does the TPS3809I50DBVT require an external pull-up resistor on the RESET pin?
No, the TPS3809I50DBVT features a push-pull RESET output stage, so no external pull-up resistor is required. The output actively drives high or low depending on supply voltage status, simplifying layout and reducing BOM count compared to open-drain alternatives.
What is the reset delay time specification for the TPS3809I50DBVT?
The TPS3809I50DBVT provides a guaranteed reset delay time (td) of 120 ms minimum to 280 ms maximum, with a typical value of 200 ms. This delay begins after VDD rises above the 4.55 V threshold and ensures reliable processor initialization before reset release.
Is the TPS3809I50DBVT pin-compatible with the MAX809 series?
Yes, the TPS3809I50DBVT is explicitly pin-for-pin compatible with the MAX809 family (e.g., MAX809SEUR+T), sharing identical SOT-23 (DBV) package dimensions, pin numbering (GND–RESET–VDD), and functional behavior-enabling direct substitution in existing designs with improved accuracy and lower current.
What is the recommended bypass capacitor for the TPS3809I50DBVT VDD pin?
A 0.1 µF ceramic capacitor placed between the VDD and GND pins is recommended per the datasheet to stabilize the internal reference and ensure consistent threshold performance, especially under fast transient or noisy supply conditions.
TPS3809I50DBVT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.55V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 120ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
TPS3809I50DBVT FAQ
1.How can I place an order for TPS3809I50DBVT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3809I50DBVT 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 TPS3809I50DBVT reliable?
The price and inventory of TPS3809I50DBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3809I50DBVT is usually 5 days.
3.What payment methods are accepted for TPS3809I50DBVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3809I50DBVT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS3809I50DBVT?
TPS3809I50DBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3809I50DBVT 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 TPS3809I50DBVT?
For technical support, including TPS3809I50DBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3809I50DBVT requirements.
6.How does Aetrix verify that TPS3809I50DBVT is sourced from the original manufacturer or authorized distributors?
All TPS3809I50DBVT 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 TPS3809I50DBVT meets industry standards.
7.What is the process for return or replacement of TPS3809I50DBVT?
All TPS3809I50DBVT units undergo pre-shipment inspection (PSI). If there is an issue with TPS3809I50DBVT, 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 TPS3809I50DBVT part is unused and in its original packaging.
Return procedure for TPS3809I50DBVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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