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Texas Instruments TPS3103E15DBVT
- Part No.:
- TPS3103E15DBVT
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
TPS3103E15DBVT.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:156
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Product details
Overview
TPS3103E15DBVT from Texas Instruments is an ultralow-supply-current voltage supervisor IC with fixed 1.434 V threshold, open-drain active-low RESET output, integrated PFI/PFO for auxiliary voltage monitoring, and manual reset input. It operates from 0.9 V to 3.6 V, draws only 1.2 μA typical supply current, supports –40°C to 125°C operation, and asserts RESET down to VDD = 0.4 V - enabling reliable power-on reset in ultra-low-power microcontroller systems.
For engineers reviewing the TPS3103E15DBVT datasheet, TPS3103E15DBVT pinout, TPS3103E15DBVT application, or TPS3103E15DBVT equivalent, this page delivers verified functional identity, exact pin roles, confirmed electrical specs (including 0.75% trip-point accuracy and 130 ms reset delay), thermal metrics, and two validated alternative parts - all mapped specifically to TPS3103E15DBVT, not the broader TPS31xx family.
Technical Context
The TPS3103E15DBVT implements a precision bandgap-based voltage reference and comparator architecture to monitor VDD against a factory-trimmed 1.434 V threshold (VIT–) with ±0.75% accuracy over temperature. Its internal 130 ms power-on reset timer initiates after VDD exceeds VIT– + VHYS (≥1.454 V), ensuring stable system initialization before processor release.
It integrates a dedicated PFI input referenced to 0.551 V (±0.009 V at 25°C) and open-drain PFO output for independent power-fail detection - fully decoupled from the main RESET path. The MR pin features a 100 kΩ internal pullup and supports noise-immune manual reset with no external debounce required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 0.9 V to 3.6 V - supports direct connection to core rails of low-voltage MCUs and battery-powered systems without regulation. |
| VDD Threshold (VIT–) | 1.434 V (typical), ±0.75% accuracy - enables precise supervision of 1.5 V logic supplies with minimal margin loss. |
| Supply Current (IDD) | 1.2 μA (typical) at VDD > VIT– - extends battery life in always-on monitoring applications such as portable medical sensors. |
| RESET Delay Time (tD) | 130 ms (typical) - provides sufficient hold time for slow-ramping power supplies and ensures stable clock lock before processor release. |
| PFI Threshold Voltage | 0.551 V (typical), ±0.029 V over –40°C to 125°C - allows accurate low-battery detection via resistor divider on 2-cell NiMH (2.4 V) or Li-ion (3.6 V) packs. |
| Operating Temperature | –40°C to 125°C - qualified for under-hood automotive modules and industrial motor control environments. |
| Output Type | Active-low open-drain RESET and PFO - enables wired-OR configuration with other supervisors and flexible pullup voltage selection (e.g., 3.3 V or 1.8 V). |
Pinout & Package
TPS3103E15DBVT is housed in a 6-pin SOT-23 (DBV) package measuring 2.90 mm × 2.80 mm, optimized for space-constrained PCB layouts in portable electronics and sensor nodes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RESET (Pin 1) | Active-low open-drain reset output | Asserts low when VDD < 1.434 V or MR is pulled low; requires external pullup; drives MCU /DSP reset input directly. |
| GND (Pin 2) | Ground reference | Primary return path for internal comparators, PFI, and RESET driver; must be connected to system ground plane with low-inductance trace. |
| MR (Pin 3) | Manual reset input | Active-low input with 100 kΩ internal pullup; forces RESET low while asserted; debounced internally - no external RC needed. |
| VDD (Pin 6) | Supply and monitored voltage input | Powers device and serves as primary supervision rail; RESET assertion valid down to 0.4 V - supports brownout detection during deep discharge. |
| PFI (Pin 4) | Power-fail input | Compares external voltage (via resistor divider) to 0.551 V reference; triggers PFO independently of VDD status - used for secondary supply or battery monitoring. |
| PFO (Pin 5) | Power-fail output | Active-low open-drain output tied to PFI status; high when PFI > 0.551 V + 15 mV hysteresis; enables early warning before main supply failure. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow quiescent current | 1.2 μA typical supply current enables multi-year operation on coin cells in IoT endpoint devices. |
| High-accuracy VDD threshold | ±0.75% trip-point tolerance eliminates need for external calibration in precision power sequencing applications. |
| Dual independent supervision paths | Simultaneous monitoring of VDD (1.434 V) and auxiliary rail (via PFI) allows coordinated reset and warning signals in multi-rail systems. |
| Robust manual reset interface | Integrated 100 kΩ pullup and noise-tolerant timing ensure reliable operator-initiated reset without external components or firmware intervention. |
| Extended temperature range | –40°C to 125°C operation supports deployment in automotive body control modules and industrial PLC I/O cards. |
Applications
| Industrial Sensor Node | Portable Medical Monitor |
|---|---|
Use Scenario: Battery-powered wireless temperature/humidity sensor operating on CR2032 coin cell with 10-year target lifetime. IC Role / Device Role / Timing Role: Primary voltage supervisor asserting RESET if main 3.0 V rail drops below 1.434 V due to aging or cold-temperature derating; PFI monitors battery voltage via 1 MΩ divider to trigger PFO warning at 2.6 V. Use Value: 1.2 μA IDD extends battery life; 130 ms tD prevents false resets during RF transmit bursts; dual-path supervision enables graceful shutdown before data corruption. | Use Scenario: Handheld ECG device using low-power MSP430 MCU, powered by rechargeable LiPo with 3.7 V nominal voltage. IC Role / Device Role / Timing Role: Monitors 1.5 V core supply (VDD) for safe MCU boot and detects battery depletion via PFI; MR pin connects to tactile reset button. Use Value: 0.75% VIT– accuracy ensures consistent reset point across production units; open-drain outputs allow shared reset bus with other peripherals; –40°C to 125°C rating covers clinical and field use cases. |
| Automotive Body Control Module | Smart Energy Meter |
Use Scenario: Under-dash module supervising 5 V DC-DC output powering CAN transceiver and microcontroller in 12 V vehicle system. IC Role / Device Role / Timing Role: VDD pin monitors regulated 5 V rail; PFI monitors raw 12 V battery via resistor network to detect cranking dips and alternator faults. Use Value: 125°C rating ensures reliability near engine bay; PFO signal alerts host MCU of impending brownout before VDD fails; MR supports service-mode reset. | Use Scenario: DIN-rail mounted meter with isolated 3.3 V logic supply and backup supercapacitor, requiring fail-safe reset during grid outage. IC Role / Device Role / Timing Role: Supervises 3.3 V logic rail (VDD) and monitors supercap voltage (via PFI) to initiate controlled shutdown before memory loss. Use Value: Dual independent thresholds prevent premature reset during transient sags; 130 ms delay accommodates capacitor hold-up time; open-drain outputs interface cleanly with isolation barriers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3103E12DBVT | Fixed 1.142 V threshold (vs. 1.434 V); identical pinout, package, and feature set. | Suitable for 1.2 V core rails instead of 1.5 V; same PFI/PFO functionality and 1.2 μA IDD. | Select when supervising lower-voltage domains; no layout or firmware changes required. |
| TPS3823-15DBVT | Higher 1.5 V threshold (±0.5%); push-pull RESET (not open-drain); no PFI/PFO; 12 μA IDD. | Lacks auxiliary voltage monitoring; higher current draw limits battery life; requires pullup removal for push-pull interface. | Use only where PFI is unnecessary and board space allows higher IDD; not drop-in compatible due to output type and missing PFO. |
Compared with TPS3103E15DBVT, TPS3103E12DBVT offers identical supervision architecture at a lower threshold for 1.2 V systems, while TPS3823-15DBVT trades PFI/PFO capability and ultralow current for tighter threshold tolerance and push-pull drive - making it suitable only for simpler, non-battery-critical designs.
Availability
TPS3103E15DBVT is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical monitors, automotive body control modules, and smart energy meters requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for TPS3103E15DBVT 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and personal electronics markets.
The TPS31xx family was designed specifically for ultra-low-power, high-accuracy voltage supervision in battery-operated and thermally demanding systems - emphasizing sub-2 μA IDD, ±0.75% threshold stability, and dual-path monitoring capability.
FAQ
What is the exact reset threshold voltage of the TPS3103E15DBVT?
The TPS3103E15DBVT has a factory-trimmed negative-going input threshold voltage (VIT–) of 1.434 V (typical), with guaranteed limits of 1.423 V (min) and 1.445 V (max) at 25°C, and 1.362 V to 1.505 V across –40°C to 125°C. This value is specific to the "E15" variant and is confirmed in Section 6.5 of the SLVS363H datasheet.
Does the TPS3103E15DBVT support monitoring a second voltage rail?
Yes, the TPS3103E15DBVT includes a dedicated PFI (power-fail input) pin referenced to a precise 0.551 V internal comparator. When used with an external resistor divider, it can monitor auxiliary voltages such as battery level or secondary power rails - generating an independent PFO (power-fail output) signal without affecting the main RESET function.
What is the supply current consumption of the TPS3103E15DBVT under normal operation?
The TPS3103E15DBVT draws 1.2 μA typical supply current (IDD) when VDD is above the threshold and the device is in steady-state supervision mode. This value is measured at VDD < 1.8 V and TA = –40°C to 85°C per Section 6.5 of the datasheet, making it ideal for multi-year battery applications.
Can the TPS3103E15DBVT be used with a 0.9 V supply rail?
Yes, the TPS3103E15DBVT is fully specified to operate from 0.9 V to 3.6 V. Its RESET output remains functional down to VDD = 0.4 V, and the internal circuitry maintains valid supervision behavior across the full 0.9 V minimum supply - confirmed in Section 6.3 Recommended Operating Conditions.
Is the manual reset (MR) pin of the TPS3103E15DBVT internally pulled up?
Yes, the MR pin of the TPS3103E15DBVT features an internal 100 kΩ pullup resistor (70–130 kΩ range), allowing it to be left unconnected when unused. When pulled low externally, it forces RESET active and holds it low for the full 130 ms timeout after release - eliminating need for external pullup or debounce circuitry.
TPS3103E15DBVT 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:
- Open Drain or Open Collector
- 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
TPS3103E15DBVT FAQ
1.How can I place an order for TPS3103E15DBVT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3103E15DBVT 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 TPS3103E15DBVT reliable?
The price and inventory of TPS3103E15DBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3103E15DBVT is usually 5 days.
3.What payment methods are accepted for TPS3103E15DBVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3103E15DBVT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS3103E15DBVT?
TPS3103E15DBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3103E15DBVT 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 TPS3103E15DBVT?
For technical support, including TPS3103E15DBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3103E15DBVT requirements.
6.How does Aetrix verify that TPS3103E15DBVT is sourced from the original manufacturer or authorized distributors?
All TPS3103E15DBVT 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 TPS3103E15DBVT meets industry standards.
7.What is the process for return or replacement of TPS3103E15DBVT?
All TPS3103E15DBVT units undergo pre-shipment inspection (PSI). If there is an issue with TPS3103E15DBVT, 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 TPS3103E15DBVT part is unused and in its original packaging.
Return procedure for TPS3103E15DBVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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