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Texas Instruments TPS3103E12DBVR
- Part No.:
- TPS3103E12DBVR
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
TPS3103E12DBVR.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:6,555
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Product details
Overview
TPS3103E12DBVR from Texas Instruments is an ultralow-supply-current voltage supervisor IC with fixed 1.2 V reset threshold, open-drain active-low RESET output, integrated PFI/PFO for auxiliary voltage monitoring, and manual reset input - delivering 1.2 μA typical supply current, ±0.75% trip-point accuracy, and 130 ms power-on reset delay for battery-powered microcontroller systems.
For engineers reviewing the TPS3103E12DBVR datasheet, TPS3103E12DBVR pinout, TPS3103E12DBVR application, or TPS3103E12DBVR equivalent, this page provides verified functional context, validated pin roles, confirmed electrical specifications, real-world use cases in low-power embedded systems, and two technically documented alternative parts with explicit differences in sensing architecture and output type.
Technical Context
The TPS3103E12DBVR supervises VDD using a precision internal voltage divider to set a fixed 1.142 V (typ) negative-going threshold (VIT–) with 20 mV hysteresis and ±0.75% initial accuracy over –40°C to 125°C. It asserts RESET when VDD falls below VIT– or rises above 0.4 V during power-up.
It integrates a dedicated PFI comparator referenced to 0.551 V (±0.009 V at 25°C), driving an open-drain PFO output independent of RESET logic; both PFI and VDD supervision paths feed separate comparators with independent timing control and no shared propagation delay path.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold (VIT–) | 1.142 V (typ), ±0.75% accuracy - ensures precise brownout detection for 1.2 V rails without external resistor networks. |
| Supply Current (IDD) | 1.2 μA (typ) at VDD < 1.8 V - enables multi-year operation on coin-cell batteries in always-on monitoring applications. |
| Power-On Reset Delay (tD) | 130 ms (typ) - guarantees stable initialization of low-voltage DSPs and microcontrollers before release from reset. |
| PFI Threshold Voltage | 0.551 V (typ), ±0.009 V at 25°C - allows accurate monitoring of auxiliary voltages (e.g., battery, analog supplies) via external resistive divider. |
| Operating Temperature | –40°C to 125°C - supports deployment in automotive under-hood, industrial motor control, and outdoor IoT edge nodes. |
| Output Type | Active-low open-drain RESET and PFO - enables wired-OR configuration, level translation, and flexible pull-up selection (e.g., to higher rail). |
| MR Input Behavior | Internal 100 kΩ pullup; RESET held low while MR is low + 130 ms after MR release - eliminates need for external pullup or debounce circuitry. |
Pinout & Package
TPS3103E12DBVR 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 < 1.142 V or MR is pulled low; requires external pullup; compatible with 0.9–3.6 V I/O domains. |
| GND (Pin 2) | Ground reference | Primary return path for internal comparators, PFI, and RESET driver; must be connected to system ground plane with low impedance. |
| MR (Pin 3) | Manual reset input | Active-low input with internal 100 kΩ pullup; forces RESET low regardless of VDD or PFI state; debounced by internal timer. |
| VDD (Pin 6) | Supply and monitored rail input | Powers device and serves as primary supervision source; operates from 0.9 V to 3.6 V; requires 0.1 μF ceramic bypass capacitor. |
| PFI (Pin 4) | Power-fail input | Compares external voltage (via resistor divider) against 0.551 V reference; triggers PFO independently of RESET logic. |
| PFO (Pin 5) | Power-fail open-drain output | Active-low output tied only to PFI status; enables early warning of auxiliary supply failure without affecting main system reset sequence. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow quiescent current | 1.2 μA typical supply current enables >10-year battery life in coin-cell–powered remote sensors and wearables. |
| High-accuracy fixed threshold | ±0.75% VIT– tolerance eliminates calibration overhead and reduces BOM count versus adjustable supervisors. |
| Dual independent supervision paths | VDD and PFI comparators operate separately with dedicated outputs - allows simultaneous monitoring of core rail and backup supply. |
| Robust manual reset interface | Integrated 100 kΩ pullup and 130 ms post-release hold-off prevent spurious resets from switch bounce or EMI. |
| Extended temperature range | –40°C to 125°C operation supports deployment in automotive engine control units and industrial PLC modules. |
Applications
| Portable Medical Sensors | Industrial Battery Management Systems |
|---|---|
|
Use Scenario: Continuous glucose monitor powered by CR2032 coin cell, requiring reliable reset during cold-start and low-battery warning before shutdown. IC Role / Device Role / Timing Role: TPS3103E12DBVR monitors 1.2 V LDO output and battery voltage via PFI; asserts RESET at brownout and PFO at 2.4 V battery threshold. Use Value: 1.2 μA supply current extends battery life beyond 3 years; dual-path supervision enables graceful firmware-initiated shutdown prior to critical undervoltage. |
Use Scenario: Smart battery pack for cordless power tools, where main 18 V Li-ion stack and 3.3 V MCU rail must be supervised independently. IC Role / Device Role / Timing Role: TPS3103E12DBVR supervises 1.2 V reference rail (VDD) and scaled battery voltage (PFI); generates RESET for MCU and PFO for fuel-gauge alert. Use Value: Fixed 1.142 V threshold ensures consistent reset point across temperature; PFO independence prevents false MCU resets during transient battery dips. |
| Low-Power Wireless Edge Nodes | Automotive Body Control Modules |
|
Use Scenario: NB-IoT sensor node in parking lot infrastructure, sleeping >99% of time and waking hourly to transmit data. IC Role / Device Role / Timing Role: TPS3103E12DBVR provides power-on reset for ARM Cortex-M0+ MCU and monitors supercapacitor backup via PFI. Use Value: 130 ms tD aligns with MCU internal oscillator stabilization time; open-drain outputs allow direct interfacing with 1.8 V RF transceiver I/O. |
Use Scenario: Door module with LIN transceiver and EEPROM, operating in under-dash environment with wide thermal and supply variation. IC Role / Device Role / Timing Role: TPS3103E12DBVR supervises 1.2 V CAN transceiver bias rail and monitors 12 V battery via PFI through resistive divider. Use Value: –40°C to 125°C rating ensures reliability across ambient extremes; ±0.75% VIT– accuracy maintains reset margin despite LDO drift over temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3106E12DBVR | Replaces PFI/PFO with SENSE/RSTSENSE inputs/outputs; same 1.2 V VDD threshold and 1.2 μA IDD. | Supports monitoring of secondary voltage (e.g., core rail) with dedicated RSTSENSE output instead of PFO warning signal. | Select when dual-rail reset coordination (e.g., VDD + VCORE) is required, not auxiliary supply warning. |
| TPS3839G12QDBVRQ1 | Automotive-grade (AEC-Q100), 1.2 V threshold, push-pull RESET, 0.9 μA IDD, but no PFI/PFO function. | Lacks independent PFI path; designed for single-rail reset in safety-critical automotive ECUs with tighter qualification requirements. | Select for automotive body electronics requiring AEC-Q100 Grade 2 qualification and lower supply current, accepting loss of PFI capability. |
Compared with TPS3103E12DBVR, TPS3106E12DBVR shifts supervision focus from auxiliary supply warning (PFO) to coordinated dual-rail reset (RSTVDD + RSTSENSE), while TPS3839G12QDBVRQ1 trades PFI functionality for automotive qualification and push-pull drive - making each suitable only for its specific system-level supervision architecture.
Availability
TPS3103E12DBVR is available at Aetrix Electronics and suitable for portable medical sensors, industrial battery management systems, low-power wireless edge nodes, and automotive body control modules requiring stable component supply with guaranteed long-term manufacturability.
Supply support for TPS3103E12DBVR 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 specializing in analog and embedded processing technologies, with leadership in power management, signal chain, and high-reliability IC design.
The TPS31xx family was engineered for ultra-low-power voltage supervision in battery-critical and thermally demanding applications - delivering precision reset thresholds, dual-path monitoring, and industry-leading quiescent current for next-generation portable and industrial systems.
FAQ
What is the exact reset threshold voltage of the TPS3103E12DBVR?
The TPS3103E12DBVR has a nominal negative-going reset threshold (VIT–) of 1.142 V at 25°C, with guaranteed limits of 1.133 V (min) and 1.151 V (max) per datasheet Section 6.5. This 1.2 V–rated threshold is factory-trimmed and exhibits ±0.75% initial accuracy, ensuring consistent brownout detection across production lots without external calibration.
Does the TPS3103E12DBVR support monitoring a second voltage rail?
Yes - the TPS3103E12DBVR includes a dedicated PFI (power-fail input) pin referenced to 0.551 V, enabling supervision of a secondary voltage (e.g., battery, analog supply) via an external resistor divider. Its corresponding open-drain PFO output asserts independently of the main RESET signal, allowing parallel fault reporting without interfering with system initialization timing.
What is the supply current consumption of the TPS3103E12DBVR across voltage and temperature?
The TPS3103E12DBVR draws 1.2 μA typical supply current (IDD) when VDD < 1.8 V and operating between –40°C and 85°C. At 125°C and VDD < 1.8 V, IDD increases to 3 μA max. Under VDD > 1.8 V, IDD rises to 4.5 μA max at 85°C and 5.5 μA max at 125°C - all values confirmed in Section 6.5 Electrical Characteristics of the TPS3103 datasheet.
How does the manual reset (MR) pin behave on the TPS3103E12DBVR?
The MR pin on the TPS3103E12DBVR is an active-low input with an internal 100 kΩ pullup resistor. Pulling MR low forces RESET low immediately and holds it low for 130 ms after MR returns high. This built-in timer eliminates external RC debounce components, and leaving MR unconnected defaults it to high - ensuring reliable reset initiation in handheld and industrial user-interface applications.
Is the TPS3103E12DBVR compatible with 0.9 V supply rails?
Yes - the TPS3103E12DBVR is fully specified to operate from 0.9 V to 3.6 V on VDD, with functional supervision down to 0.4 V (RESET assertion threshold). Its 1.2 V reset threshold remains accurate across this full supply range, and PFI comparator operation requires only VDD ≥ 0.8 V - making it suitable for emerging ultra-low-voltage microcontrollers and energy-harvesting systems.
TPS3103E12DBVR 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:
- 1.142V
- 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
TPS3103E12DBVR FAQ
1.How can I place an order for TPS3103E12DBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3103E12DBVR 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 TPS3103E12DBVR reliable?
The price and inventory of TPS3103E12DBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3103E12DBVR is usually 5 days.
3.What payment methods are accepted for TPS3103E12DBVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3103E12DBVR transactions.
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4.How is shipping managed for TPS3103E12DBVR?
TPS3103E12DBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3103E12DBVR 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 TPS3103E12DBVR?
For technical support, including TPS3103E12DBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3103E12DBVR requirements.
6.How does Aetrix verify that TPS3103E12DBVR is sourced from the original manufacturer or authorized distributors?
All TPS3103E12DBVR 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 TPS3103E12DBVR meets industry standards.
7.What is the process for return or replacement of TPS3103E12DBVR?
All TPS3103E12DBVR units undergo pre-shipment inspection (PSI). If there is an issue with TPS3103E12DBVR, 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 TPS3103E12DBVR part is unused and in its original packaging.
Return procedure for TPS3103E12DBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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