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Texas Instruments TPS3103E12DBVTG4
- Part No.:
- TPS3103E12DBVTG4
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
TPS3103E12DBVTG4.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
TPS3103E12DBVTG4 from Texas Instruments is an ultralow-quiescent-current voltage supervisor IC with fixed 1.2V VDD threshold, open-drain active-low RESET output, and integrated power-fail monitoring (PFI/PFO). It operates from 0.9V to 3.6V supply, draws only 1.2μA typical current, asserts RESET down to 0.4V VDD, and provides 130ms power-on reset delay - used for reliable initialization of low-power microcontrollers in battery-powered systems.
For engineers reviewing the TPS3103E12DBVTG4 datasheet, TPS3103E12DBVTG4 pinout, TPS3103E12DBVTG4 application, or TPS3103E12DBVTG4 equivalent, key selection criteria include its ±0.75% trip-point accuracy, –40°C to 125°C operating range, SOT-23-6 package, PFI input referenced to 0.551V, and compatibility with systems requiring precise low-voltage supervision without watchdog functionality.
Technical Context
The TPS3103E12DBVTG4 implements a precision bandgap-based voltage reference and comparator architecture to monitor VDD against a factory-trimmed 1.2V threshold (VIT– = 1.142V typ at 25°C, ±0.75% tolerance). Its internal timer initiates a fixed 130ms delay after VDD exceeds VIT– + VHYS before deasserting RESET, ensuring stable power-rail settling.
It integrates a dedicated PFI input compared to a 0.551V internal reference (±0.009V at 25°C), driving an open-drain PFO output independent of RESET logic. The MR pin features a 100kΩ internal pullup and supports manual reset assertion with sub-5μs propagation delay, enabling system-level recovery control without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Threshold (VIT–) | 1.142V (typ), ±0.75% accuracy - ensures precise 1.2V supply supervision with minimal margin loss in low-voltage systems |
| Supply Current (IDD) | 1.2μA (typ) at VDD > VIT– and VDD < 1.8V - enables multi-year battery life in always-on portable equipment |
| RESET Assertion Voltage | Valid down to VDD = 0.4V - guarantees reset signal integrity during deep brownout or cold-start conditions |
| Power-On Reset Delay (tD) | 130ms (typ) - provides sufficient time for LDOs, clocks, and memory to stabilize before processor release |
| PFI Reference Voltage | 0.551V (typ), ±0.009V at 25°C - allows accurate monitoring of auxiliary rails (e.g., 1.8V, 2.5V, 3.3V) via resistor divider |
| Operating Temperature | –40°C to 125°C - supports deployment in automotive under-hood, industrial motor drives, and outdoor IoT nodes |
| Hysteresis (VHYS) | 20mV - prevents oscillatory reset toggling near threshold during slow-rising or noisy supply transitions |
Pinout & Package
TPS3103E12DBVTG4 is housed in a 6-pin SOT-23 (DBV) package measuring 2.90mm × 2.80mm, optimized for space-constrained PCB layouts and compatible with standard high-volume pick-and-place assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RESET (Pin 1) | Active-low open-drain reset output | Drives external pullup; asserts low when VDD < VIT– or MR is low; requires external RC for glitch filtering if needed |
| GND (Pin 2) | Ground reference | Common return path for all internal comparators, timer, and output stage; must be low-impedance connection |
| MR (Pin 3) | Manual reset input | Active-low asynchronous reset trigger; internally pulled up to VDD (100kΩ); debounced by tD delay on release |
| VDD (Pin 6) | Supply and monitored rail input | Powers device and serves as primary supervision source; valid operation requires VDD ≥ 0.9V and ≤ 3.6V |
| PFI (Pin 4) | Power-fail input | Compares external voltage to 0.551V reference; used to monitor secondary supplies or battery voltage via resistor divider |
| PFO (Pin 5) | Power-fail output | Open-drain output asserting low when PFI < 0.551V; independent of RESET state and timing |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow 1.2μA supply current | Enables >10-year battery life in coin-cell–powered IoT sensors and wearables without compromising supervision reliability |
| ±0.75% VDD threshold accuracy | Reduces design margin overhead vs. ±2% alternatives, allowing tighter VDD regulation and smaller bypass capacitors |
| 0.4V minimum VDD for RESET assertion | Guarantees deterministic reset behavior during ultra-low-voltage brownout, critical for energy-harvesting systems |
| 130ms programmable reset delay | Matches typical LDO startup and crystal oscillator stabilization times, eliminating need for external RC timing networks |
| Independent PFI/PFO monitoring channel | Supports dual-rail supervision (e.g., main VDD + backup battery) with zero additional quiescent current penalty |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Continuous glucose monitors and pulse oximeters powered by CR2032 coin cells requiring multi-year operation with guaranteed reset at end-of-life voltage. IC Role / Device Role / Timing Role: Primary VDD supervisor and battery voltage monitor via PFI, asserting RESET and PFO independently to trigger graceful shutdown and low-battery alert. Use Value: 1.2μA IDD extends usable battery life by >30% vs. 3μA alternatives; 1.2V threshold aligns precisely with LiMnO₂ discharge curve knee. | Use Scenario: DIN-rail mounted programmable logic controller modules operating in harsh factory environments with wide ambient temperature swings. IC Role / Device Role / Timing Role: Dual-function supervisor: monitors 3.3V logic rail (VDD) and 24V field bus supply (via PFI divider), providing fail-safe reset and power-fail warning signals. Use Value: –40°C to 125°C rating ensures reliability across uncontrolled enclosures; ±0.75% accuracy eliminates recalibration during thermal cycling. |
| Wireless Sensor Nodes | Automotive Body Control Modules |
Use Scenario: Sub-GHz LoRaWAN sensor nodes deployed outdoors, harvesting energy from solar cells and storing in supercapacitors. IC Role / Device Role / Timing Role: Supervises harvested rail (VDD) and triggers PFO when storage voltage drops below safe operating level, enabling controlled sleep-mode entry. Use Value: 0.4V RESET assertion enables full utilization of supercapacitor discharge curve; PFI hysteresis prevents false alarms during transient load spikes. | Use Scenario: Door module ECUs powered from vehicle battery (9V–16V) with internal 3.3V LDO, requiring robust brownout detection during cranking events. IC Role / Device Role / Timing Role: Monitors post-LDO 3.3V rail (VDD) and asserts RESET within 40μs of undervoltage, while PFO warns of main battery sag via PFI divider. Use Value: 40μs tPHL(VDD) ensures MCU reset before register corruption; 130ms tD prevents spurious resets during <100ms cranking dips. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3103E12DBVR | Same electrical specs and pinout; tape-and-reel packaging (3000 pcs/reel) vs. cut-tape (250 pcs/reel) for TPS3103E12DBVTG4 | No functional difference; suited for high-volume automated assembly | Select TPS3103E12DBVR for production runs ≥5k units to reduce handling cost and improve placement yield |
| MAX6326XR31D3+T | 1.2V threshold, 1.6μA IDD, SOT-23-5, no PFI/PFO - single-rail only, missing auxiliary monitoring capability | Lacks independent power-fail channel; requires external circuitry for dual-supply monitoring | Choose only if PFI/PFO functionality is unnecessary and board space permits SOT-23-5 footprint |
Compared with TPS3103E12DBVTG4, TPS3103E12DBVR offers identical performance in volume-optimized packaging, while MAX6326XR31D3+T sacrifices PFI/PFO functionality for slightly higher quiescent current and reduced pin count - making TPS3103E12DBVTG4 optimal for designs requiring dual-rail supervision in minimal area.
Availability
TPS3103E12DBVTG4 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, wireless sensor nodes, and automotive body control modules requiring stable component supply with guaranteed long-term manufacturability.
Supply support for TPS3103E12DBVTG4 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 ultralow-power voltage supervision in battery-critical and thermally demanding applications, emphasizing precision threshold accuracy, nanoscale quiescent current, and dual-monitoring capability in miniature packages.
FAQ
What is the exact VDD threshold voltage of the TPS3103E12DBVTG4 and how tightly is it specified?
The TPS3103E12DBVTG4 has a nominal VDD threshold (VIT–) of 1.2V, with a typical value of 1.142V at 25°C and a maximum deviation of ±0.75% across temperature and process. This corresponds to a guaranteed range of 1.084V to 1.199V over –40°C to 125°C, enabling robust design margining for 1.2V rails without overspecifying LDO tolerance.
Does the TPS3103E12DBVTG4 support monitoring a second voltage rail besides VDD?
Yes, the TPS3103E12DBVTG4 supports auxiliary rail monitoring via its PFI (power-fail input) pin, which compares an external voltage to a precise 0.551V internal reference. When the divided-down voltage at PFI falls below this threshold, the open-drain PFO output asserts low - fully independent of the VDD supervision path and RESET timing.
What is the minimum VDD voltage at which the TPS3103E12DBVTG4 can still assert a valid RESET signal?
The TPS3103E12DBVTG4 guarantees RESET assertion functionality down to VDD = 0.4V, as confirmed in the Electrical Characteristics table (VOL specification at VDD = 0.4V, IOL = 5μA). This enables reliable reset signaling even during deep brownout or energy-harvesting scenarios where supply voltage collapses gradually.
How does the manual reset (MR) pin behave when left unconnected on the TPS3103E12DBVTG4?
When left unconnected, the MR pin on the TPS3103E12DBVTG4 is pulled high internally by a 100kΩ resistor, rendering it inactive. No external pullup is required. If used, a momentary switch to GND suffices - no external debounce components are needed due to the built-in 130ms reset timeout that masks contact bounce.
Is the TPS3103E12DBVTG4 compatible with 1.8V or 3.3V logic systems despite its 1.2V VDD threshold?
Yes, the TPS3103E12DBVTG4 operates from 0.9V to 3.6V supply and maintains full functionality at 1.8V and 3.3V. Its 1.2V VDD threshold applies only to the monitored rail - not the logic interface. The open-drain RESET and PFO outputs are compatible with any pullup voltage up to 6V, enabling seamless integration into mixed-voltage systems.
TPS3103E12DBVTG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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
TPS3103E12DBVTG4 FAQ
1.How can I place an order for TPS3103E12DBVTG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3103E12DBVTG4 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 TPS3103E12DBVTG4 reliable?
The price and inventory of TPS3103E12DBVTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3103E12DBVTG4 is usually 5 days.
3.What payment methods are accepted for TPS3103E12DBVTG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3103E12DBVTG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS3103E12DBVTG4?
TPS3103E12DBVTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3103E12DBVTG4 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 TPS3103E12DBVTG4?
For technical support, including TPS3103E12DBVTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3103E12DBVTG4 requirements.
6.How does Aetrix verify that TPS3103E12DBVTG4 is sourced from the original manufacturer or authorized distributors?
All TPS3103E12DBVTG4 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 TPS3103E12DBVTG4 meets industry standards.
7.What is the process for return or replacement of TPS3103E12DBVTG4?
All TPS3103E12DBVTG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS3103E12DBVTG4, 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 TPS3103E12DBVTG4 part is unused and in its original packaging.
Return procedure for TPS3103E12DBVTG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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