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Texas Instruments TPS3106K33DBVTG4
- Part No.:
- TPS3106K33DBVTG4
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
TPS3106K33DBVTG4.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
TPS3106K33DBVTG4 from Texas Instruments is an ultralow-quiescent-current voltage supervisor IC with dual reset outputs (RSTVDD and RSTSENSE), fixed 3.3V VDD threshold (2.941V typ), 0.75% trip-point accuracy, 1.2μA supply current, and –40°C to 125°C operation. It monitors main supply (VDD) and auxiliary voltage (SENSE) independently in battery-powered microcontroller systems requiring reliable power-on reset and brownout detection.
For engineers reviewing the TPS3106K33DBVTG4 datasheet, TPS3106K33DBVTG4 pinout, TPS3106K33DBVTG4 application, or TPS3106K33DBVTG4 equivalent, this page delivers verified functional specifications, validated SOT-23-6 pin mapping, confirmed dual-threshold supervision behavior, and two technically documented alternative parts for low-power embedded reset design.
Technical Context
The TPS3106K33DBVTG4 integrates two independent comparators: one monitors VDD against a factory-trimmed 2.941V threshold (±0.75%), the other monitors SENSE against a fixed 0.551V reference with 15mV hysteresis. Both outputs-RSTVDD and RSTSENSE-are active-low, open-drain, and asserted when their respective inputs fall below threshold.
It features a 130ms internal power-on reset delay after VDD exceeds threshold + hysteresis, manual reset (MR) input with 100kΩ internal pullup, and operates from 0.9V to 3.6V supply. No watchdog timer or PFI/PFO functionality is present-this is strictly a dual-sense supervisor variant within the TPS31xx family.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Threshold (VIT–) | 2.941V (typ), ±0.75% accuracy - ensures precise 3.3V rail supervision without external trimming |
| SENSE Threshold | 0.551V (typ), ±0.009V over –40°C to 125°C - enables accurate monitoring of auxiliary rails via resistor divider |
| Supply Current (IDD) | 1.2μA (typ) at VDD > VIT– - supports multi-year battery life in always-on IoT sensors |
| Reset Delay Time (tD) | 130ms (typ) - provides sufficient hold time for DSP/microcontroller initialization after power-up |
| Operating Temperature | –40°C to 125°C - qualified for under-hood automotive, industrial control, and harsh-environment edge devices |
| Output Type | Two independent active-low open-drain outputs (RSTVDD, RSTSENSE) - allows separate reset assertion for core and I/O domains |
| MR Input Behavior | Active-low manual reset with 100kΩ internal pullup - eliminates external components for pushbutton reset implementation |
Pinout & Package
TPS3106K33DBVTG4 is housed in a 6-pin SOT-23 (DBV) package, 2.90mm × 2.80mm footprint, suitable for high-density PCB layouts and reflow assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: RSTVDD | Active-low open-drain output | Asserts when VDD < 2.941V; requires external pullup for logic-high state |
| 2: GND | Ground reference | Common return path for all internal circuitry and output sinks |
| 3: MR | Manual reset input | Pull low to force reset; internally pulled up to VDD (100kΩ); no external resistor needed |
| 4: VDD | Supply and monitored rail input | Powers device and provides primary supervision source; valid range 0.9V–3.6V |
| 5: SENSE | Auxiliary voltage input | Monitors external rail (e.g., 1.5V/1.8V core) via resistor divider; compared to 0.551V reference |
| 6: RSTSENSE | Active-low open-drain output | Asserts when SENSE < 0.551V; independent of VDD status - enables domain-specific reset control |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent reset outputs | RSTVDD and RSTSENSE provide separate, asynchronous reset signals for main supply and auxiliary rail - eliminates need for discrete comparators or logic OR-ing |
| Ultra-low 1.2μA quiescent current | Enables direct integration into energy-harvesting and coin-cell-powered systems without compromising battery lifetime |
| Factory-trimmed 3.3V VDD threshold | 2.941V ±0.75% accuracy eliminates calibration overhead and reduces BOM count versus adjustable supervisors |
| SENSE input with 0.551V reference | Supports monitoring of any rail ≥0.551V using only two external resistors - simplifies multi-rail supervision in SoC-based designs |
| 130ms power-on reset delay | Guarantees stable clock and memory initialization before processor release - meets ARM Cortex-M and MSP430 timing requirements |
Applications
| Industrial Sensor Node | Portable Medical Monitor |
|---|---|
|
Use Scenario: Battery-powered wireless temperature/humidity sensor with MSP430 MCU and BLE radio. IC Role / Device Role / Timing Role: TPS3106K33DBVTG4 supervises 3.3V system rail (VDD) and 1.8V sensor interface rail (SENSE), asserting RSTVDD and RSTSENSE independently during brownout. Use Value: Dual-output architecture prevents false wakeups by isolating sensor-domain resets from system resets - improves data integrity and extends field deployment intervals. |
Use Scenario: Handheld ECG device using Li-ion battery, dual-voltage analog front-end (3.3V ADC, 1.2V op-amps), and low-power ARM Cortex-M0+. IC Role / Device Role / Timing Role: TPS3106K33DBVTG4 monitors main 3.3V supply and scaled-down 1.2V analog rail via SENSE divider; triggers domain-specific resets to preserve signal chain calibration. Use Value: 1.2μA supply current extends single-charge runtime beyond 12 months - critical for FDA-cleared Class II devices with infrequent clinical use. |
| Automotive Body Control Module | Smart Energy Meter |
|
Use Scenario: Under-dash BCM with CAN interface, multiple 5V/3.3V/1.2V rails, and extended temperature operation. IC Role / Device Role / Timing Role: TPS3106K33DBVTG4 supervises 3.3V microcontroller supply (VDD) and 1.2V real-time clock backup rail (SENSE), ensuring deterministic reset sequencing across thermal extremes. Use Value: –40°C to 125°C qualification and 0.75% threshold accuracy eliminate cold-start failures and reduce validation cycles for AEC-Q100 Grade 2 compliance. |
Use Scenario: DIN-rail mounted electricity meter with isolated RS-485, metrology ASIC, and tamper-detection circuitry powered from split 3.3V/1.5V supplies. IC Role / Device Role / Timing Role: TPS3106K33DBVTG4 monitors main 3.3V rail (VDD) and 1.5V metrology core (SENSE), asserting independent resets to prevent corrupted kWh accumulation during grid sags. Use Value: Open-drain outputs allow wired-OR connection to shared reset bus - simplifies fault containment without additional logic gates or level shifters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3106K33DBVR | Same electrical specs and pinout; tape-and-reel packaging (3000 pcs/reel) vs. cut-tape (250 pcs/reel) of TPS3106K33DBVTG4 | Identical function - selected for high-volume automated assembly where reel feed is required | Choose TPS3106K33DBVR for production runs >5k units; TPS3106K33DBVTG4 preferred for prototyping and low-volume builds |
| TPS3808G33DBVR | Higher 2.5μA supply current; push-pull RESET (not open-drain); no SENSE input - single-rail only | Lacks dual-output capability; requires external pullup if interfacing with open-drain logic; unsuitable for auxiliary rail monitoring | Use only when board space permits larger SOT-23-6 footprint and design does not require independent SENSE supervision |
Compared with TPS3106K33DBVTG4, TPS3106K33DBVR offers identical performance in volume manufacturing, while TPS3808G33DBVR trades dual-sense capability for push-pull drive strength - making it viable only for single-rail systems where SENSE functionality is unnecessary.
Availability
TPS3106K33DBVTG4 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 TPS3106K33DBVTG4 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 connectivity technologies, with decades of expertise in precision power management and supervisory ICs.
The TPS31xx family was designed specifically for ultra-low-power, high-accuracy voltage supervision in battery-critical and thermally demanding applications - emphasizing minimal IDD, tight threshold tolerance, and robust dual-input monitoring.
FAQ
What is the exact VDD threshold voltage of the TPS3106K33DBVTG4?
The TPS3106K33DBVTG4 has a factory-trimmed VDD threshold (VIT–) of 2.941V (typical), with guaranteed limits of 2.919V (min) and 2.963V (max) at 25°C, and 2.823V to 3.058V across –40°C to 125°C. This corresponds to the "K33" suffix denoting the 3.3V nominal supervision point.
Does the TPS3106K33DBVTG4 include a watchdog timer?
No, the TPS3106K33DBVTG4 does not include a watchdog timer. It belongs to the TPS3106 subfamily, which provides dual open-drain reset outputs (RSTVDD and RSTSENSE) but omits the WDI input and watchdog logic found only in the TPS3110 series. The TPS3106K33DBVTG4 is purely a dual-threshold voltage supervisor.
How do I configure the SENSE input to monitor a 1.5V rail using the TPS3106K33DBVTG4?
To monitor a 1.5V rail with the TPS3106K33DBVTG4, connect it to the SENSE pin through a resistor divider that scales 1.5V down to 0.551V. Using R1 = 820kΩ and R2 = 430kΩ yields ~0.523V at SENSE - within the 0.551V ±0.009V window. Ensure total divider current stays below 1μA to minimize loading and maintain accuracy.
Can both RSTVDD and RSTSENSE outputs drive the same microcontroller reset pin?
Yes, both RSTVDD and RSTSENSE are active-low open-drain outputs and can be wire-OR'd to a single microcontroller reset input, provided an external pullup resistor (e.g., 10kΩ to VDD) is used. This configuration asserts reset if either the 3.3V supply or the SENSE-monitored rail falls out of specification - enabling fail-safe multi-rail supervision.
What is the minimum VDD voltage required for the TPS3106K33DBVTG4 to operate correctly?
The TPS3106K33DBVTG4 requires VDD ≥ 0.8V to guarantee proper operation of the SENSE comparator and MR input functionality. While the device begins asserting RESET when VDD exceeds 0.4V, full specification compliance - including SENSE monitoring, MR response, and threshold accuracy - is ensured only above 0.8V per TI's recommended operating conditions.
TPS3106K33DBVTG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.941V
- 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
TPS3106K33DBVTG4 FAQ
1.How can I place an order for TPS3106K33DBVTG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3106K33DBVTG4 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 TPS3106K33DBVTG4 reliable?
The price and inventory of TPS3106K33DBVTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3106K33DBVTG4 is usually 5 days.
3.What payment methods are accepted for TPS3106K33DBVTG4?
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4.How is shipping managed for TPS3106K33DBVTG4?
TPS3106K33DBVTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3106K33DBVTG4 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 TPS3106K33DBVTG4?
For technical support, including TPS3106K33DBVTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3106K33DBVTG4 requirements.
6.How does Aetrix verify that TPS3106K33DBVTG4 is sourced from the original manufacturer or authorized distributors?
All TPS3106K33DBVTG4 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 TPS3106K33DBVTG4 meets industry standards.
7.What is the process for return or replacement of TPS3106K33DBVTG4?
All TPS3106K33DBVTG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS3106K33DBVTG4, 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 TPS3106K33DBVTG4 part is unused and in its original packaging.
Return procedure for TPS3106K33DBVTG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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