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Texas Instruments TPS3110E15DBVT
- Part No.:
- TPS3110E15DBVT
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
TPS3110E15DBVT.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,080
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Product details
Overview
TPS3110E15DBVT from Texas Instruments is an ultralow-quiescent-current voltage supervisor IC with integrated watchdog timer, designed for power-on reset and runtime supervision of microprocessors in battery-constrained systems. It features a fixed 1.434 V (±0.75%) VDD threshold, 1.2 μA typical supply current, push/pull active-low RESET output, and watchdog timeout of 1.1 s (typical), deployed in portable instrumentation and low-power DSP subsystems.
For engineers reviewing the TPS3110E15DBVT datasheet, TPS3110E15DBVT pinout, TPS3110E15DBVT application, or TPS3110E15DBVT equivalent, key selection criteria include its 1.434 V trip point accuracy, –40°C to 125°C operating range, SOT-23-6 package compatibility, and watchdog timer support for fail-safe microprocessor monitoring without external components.
Technical Context
The TPS3110E15DBVT implements a precision bandgap-based voltage reference and comparator architecture to monitor VDD against a factory-trimmed 1.434 V threshold with 0.75% initial accuracy and ±0.019%/K temperature coefficient. Its internal 130 ms power-on reset delay timer activates only after VDD exceeds VIT– + VHYS (≥1.454 V), ensuring clean system initialization.
Watchdog functionality is implemented via edge-triggered WDI input: any rising or falling edge resets the 1.1 s timeout counter; failure to retrigger within that window forces RESET assertion. The push/pull RESET driver supports direct interface to microcontroller reset inputs without pull-up resistors, while MR provides manual reset override with internal 100 kΩ pullup.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Threshold (VIT–) | 1.434 V (typical), ±0.75% accuracy - ensures precise reset assertion at 1.5 V rail without external trimming |
| Supply Current (IDD) | 1.2 μA (typical) at VDD < 1.8 V - enables multi-year battery life in always-on monitoring applications |
| RESET Delay Time (tD) | 130 ms (typical) - provides sufficient hold time for stable power-rail settling before processor release |
| Watchdog Timeout (tT(OUT)) | 1.1 s (typical) - balances fault detection responsiveness with tolerance for brief software stalls |
| Operating Temperature | –40°C to 125°C - supports deployment in automotive under-hood and industrial control environments |
| SENSE Threshold (VIT–(S)) | 0.551 V (typical), ±0.08 V over temperature - enables accurate monitoring of auxiliary rails via external resistor divider |
| Output Type | Active-low push/pull RESET - eliminates need for external pull-up resistor, reduces BOM count and board space |
Pinout & Package
TPS3110E15DBVT is housed in a 6-pin SOT-23 (DBV) package, 2.90 mm × 2.80 mm footprint, optimized for high-density PCB layouts and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: RESET | Active-low push/pull reset output | Drives microcontroller /DSP reset pin directly; no external pull-up required; sinks up to 5 mA |
| 2: GND | Ground reference | Common return path for all internal circuitry and external sensing networks |
| 3: MR | Manual reset input | Active-low; internally pulled up to VDD (100 kΩ); asserts RESET when pulled ≤0.3×VDD |
| 4: VDD | Supply and monitored voltage input | Powers device and serves as primary supervision rail; valid operation requires VDD ≥ 0.9 V |
| 5: SENSE | Auxiliary voltage sense input | Compares external voltage (via resistor divider) to 0.551 V reference; triggers RESET if below threshold |
| 6: WDI | Watchdog timer input | Edge-sensitive (rising/falling); must be toggled within 1.1 s to prevent watchdog timeout and RESET assertion |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow supply current | 1.2 μA typical enables >10-year coin-cell operation in maintenance-free sensor nodes |
| High-accuracy VDD threshold | ±0.75% initial tolerance eliminates calibration overhead in production test |
| Integrated watchdog timer | 1.1 s timeout with edge-triggered WDI simplifies firmware watchdog management |
| Push/pull RESET output | Eliminates external pull-up resistor, reducing component count and layout complexity |
| Wide operating temperature | –40°C to 125°C rating supports use in automotive engine control units and industrial PLCs |
| SENSE input with 0.551 V reference | Enables monitoring of secondary rails (e.g., 1.5 V core, 3.3 V I/O) using two standard resistors |
Applications
| Portable Medical Sensors | Industrial IoT Edge Nodes |
|---|---|
|
Use Scenario: Continuous glucose monitor powered by CR2032 coin cell, requiring decade-level battery life and guaranteed reset on brownout. IC Role / Device Role / Timing Role: Primary power-on reset generator and runtime VDD supervisor; asserts RESET if main rail drops below 1.434 V or watchdog fails to receive WDI edge. Use Value: 1.2 μA quiescent current extends battery life beyond 12 years; push/pull RESET ensures reliable MCU reset without leakage-path concerns. |
Use Scenario: Wireless vibration sensor node mounted on rotating machinery, exposed to wide ambient temperature swings and intermittent power. IC Role / Device Role / Timing Role: Dual-rail supervisor: monitors 3.3 V radio supply via VDD pin and 1.5 V MCU core via SENSE pin with resistor divider. Use Value: Single-device supervision of multiple rails reduces BOM cost; –40°C to 125°C operation guarantees reliability across seasonal and mechanical thermal transients. |
| Low-Power DSP Audio Processors | Automotive Body Control Modules |
|
Use Scenario: Hearing aid DSP subsystem operating from 1.2 V rechargeable Li-ion, where reset integrity directly impacts user safety. IC Role / Device Role / Timing Role: Power-on reset initiator and runtime watchdog controller; WDI fed by DSP timer interrupt to detect firmware lockup. Use Value: 130 ms RESET delay prevents premature release during power ramp; 1.1 s watchdog timeout tolerates worst-case DSP interrupt latency. |
Use Scenario: Door module ECU powered from vehicle battery (9–16 V), requiring robust reset behavior during cold-crank and load-dump events. IC Role / Device Role / Timing Role: Supervises regulated 5 V supply (via SENSE divider) and detects undervoltage conditions before MCU enters undefined state. Use Value: 0.75% threshold accuracy ensures consistent reset point across production lots; 125°C rating supports placement near power MOSFETs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3110E12DBVT | Fixed 1.142 V VDD threshold; identical package, timing, and watchdog specs | Suitable for 1.2 V core rails instead of 1.5 V; same SENSE/WDI/MR functionality | Select when supervising lower-voltage processors or SoCs with 1.2 V nominal supply |
| TPS3823-15DBVT | Open-drain RESET output; no watchdog; 1.5 V threshold; 2.5 μA supply current | Lacks WDI capability; requires external pull-up; higher IDD reduces battery lifetime | Choose only if watchdog is unnecessary and design already uses open-drain reset topology |
Compared with TPS3110E15DBVT, the TPS3110E12DBVT offers identical watchdog and SENSE functionality at a lower threshold for 1.2 V systems, while the TPS3823-15DBVT sacrifices watchdog capability and efficiency for legacy open-drain compatibility.
Availability
TPS3110E15DBVT is available at Aetrix Electronics and suitable for portable medical sensors, industrial IoT edge nodes, low-power DSP audio processors, and automotive body control modules requiring stable component supply across extended product lifecycles.
Supply support for TPS3110E15DBVT 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 company delivering analog and embedded processing solutions, with leadership in power management, signal chain, and microcontrollers.
The TPS31xx family is engineered for ultra-low-power voltage supervision in battery-operated and thermally demanding systems, emphasizing precision threshold accuracy, minimal quiescent current, and integrated watchdog safety for microprocessor-based equipment.
FAQ
What is the exact VDD threshold voltage of the TPS3110E15DBVT?
The TPS3110E15DBVT has a nominal VDD threshold voltage (VIT–) of 1.434 V at 25°C, with a guaranteed initial accuracy of ±0.75% (1.423 V to 1.445 V). Over the full –40°C to 125°C temperature range, the threshold remains within 1.362 V to 1.505 V, supported by a temperature coefficient of –0.019%/K.
Does the TPS3110E15DBVT require an external pull-up resistor on the RESET pin?
No, the TPS3110E15DBVT features a push/pull RESET output stage, meaning it actively drives both high and low states. Unlike open-drain supervisors, it does not require an external pull-up resistor-reducing component count and eliminating potential leakage paths that could compromise battery life in always-on applications.
How does the watchdog timer in the TPS3110E15DBVT operate?
The TPS3110E15DBVT watchdog timer is edge-triggered via the WDI pin: each rising or falling edge resets the 1.1 s (typical) timeout counter. If no edge occurs within that window, RESET is asserted for 130 ms. The timer clears automatically upon RESET assertion or WDI transition, enabling simple firmware integration using GPIO toggles or timer interrupts.
Can the TPS3110E15DBVT monitor a 3.3 V supply rail?
Yes-the TPS3110E15DBVT can supervise a 3.3 V rail using its SENSE input with an external resistor divider. The internal SENSE reference is 0.551 V (±0.08 V), so a 3.3 V rail maps to R1/R2 ≈ 5.0 using standard 1% resistors. VDD must remain ≥0.9 V for proper SENSE comparator operation, but the device itself is powered from the same or separate regulated supply.
What is the minimum VDD voltage required for the TPS3110E15DBVT to function correctly?
The TPS3110E15DBVT requires VDD ≥ 0.9 V for functional operation per recommended conditions. Below this, internal comparators and logic may behave unpredictably. However, RESET is defined down to VDD = 0.4 V during power-on sequencing-ensuring early assertion even during deep brownout conditions before full regulation is achieved.
TPS3110E15DBVT 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:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 1.434V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 65ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
TPS3110E15DBVT FAQ
1.How can I place an order for TPS3110E15DBVT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3110E15DBVT 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 TPS3110E15DBVT reliable?
The price and inventory of TPS3110E15DBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3110E15DBVT is usually 5 days.
3.What payment methods are accepted for TPS3110E15DBVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3110E15DBVT transactions.
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4.How is shipping managed for TPS3110E15DBVT?
TPS3110E15DBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3110E15DBVT 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 TPS3110E15DBVT?
For technical support, including TPS3110E15DBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3110E15DBVT requirements.
6.How does Aetrix verify that TPS3110E15DBVT is sourced from the original manufacturer or authorized distributors?
All TPS3110E15DBVT 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 TPS3110E15DBVT meets industry standards.
7.What is the process for return or replacement of TPS3110E15DBVT?
All TPS3110E15DBVT units undergo pre-shipment inspection (PSI). If there is an issue with TPS3110E15DBVT, 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 TPS3110E15DBVT part is unused and in its original packaging.
Return procedure for TPS3110E15DBVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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