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Texas Instruments TPS3106K33DBVRG4
- Part No.:
- TPS3106K33DBVRG4
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
TPS3106K33DBVRG4.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
TPS3106K33DBVRG4 from Texas Instruments is an ultralow-quiescent-current voltage supervisor IC with dual open-drain reset outputs (RSTVDD and RSTSENSE), fixed 3.3V VDD threshold (2.941V typ), 0.75% trip-point accuracy, and 1.2μA typical supply current. It monitors both main supply (VDD) and auxiliary voltages (via SENSE pin) in battery-powered microcontroller systems requiring precise power-on reset and brownout detection.
For engineers reviewing the TPS3106K33DBVRG4 datasheet, TPS3106K33DBVRG4 pinout, TPS3106K33DBVRG4 application, or TPS3106K33DBVRG4 equivalent, key selection criteria include its dual-sense capability, –40°C to 125°C operating range, 130ms reset delay, and compatibility with low-voltage DSPs and portable equipment where supply current below 2μA is critical.
Technical Context
The TPS3106K33DBVRG4 implements two independent comparators: one monitoring VDD against a precision internal 2.941V threshold (±0.75%), and another comparing SENSE input to a fixed 0.551V reference. Both outputs-RSTVDD and RSTSENSE-are active-low, open-drain, and asserted when their respective inputs fall below threshold, with hysteresis of 50mV (VDD) and 15mV (SENSE).
It features a manual reset (MR) input with internal 100kΩ pullup, supports operation down to VDD = 0.4V for early reset assertion, and includes a 130ms internal power-on reset timer that begins after VDD exceeds VIT– + VHYS. No watchdog or PFI/PFO functionality is present-this is a dedicated dual-threshold supervisor without timing supervision beyond the fixed reset delay.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Threshold | 2.941V (typ), ±0.75% accuracy - ensures reliable 3.3V rail supervision with minimal false triggering across temperature. |
| SENSE Threshold | 0.551V (typ), ±0.039V over –40°C to 125°C - enables accurate monitoring of auxiliary rails (e.g., 1.2V, 1.5V) using external resistor dividers. |
| Supply Current | 1.2μA (typ) at VDD > VIT– - extends battery life in always-on portable devices without compromising supervision integrity. |
| Reset Delay | 130ms (typ) - provides sufficient hold time for processor initialization after power stabilization, meeting ARM/RTOS boot requirements. |
| Operating Temp | –40°C to 125°C - qualified for under-hood automotive modules, industrial controllers, and high-reliability embedded systems. |
| Output Type | Two independent open-drain outputs (RSTVDD, RSTSENSE) - allows separate reset signaling for core and I/O domains with external pullups. |
| Hysteresis | 50mV on VDD, 15mV on SENSE - prevents output oscillation during slow-rising/falling supply transitions near threshold. |
Pinout & Package
TPS3106K33DBVRG4 is housed in a 6-pin SOT-23 (DBV) package, 2.90mm × 2.80mm footprint, optimized for space-constrained PCB layouts in portable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input & primary sense node | Powers the IC and triggers RSTVDD when voltage drops below 2.941V; functional down to 0.4V for early reset assertion. |
| GND | Ground reference | Analog and digital ground return; must be low-impedance to ensure comparator accuracy and noise immunity. |
| MR | Manual reset input | Active-low input with 100kΩ internal pullup; forces both RSTVDD and RSTSENSE low when pulled to GND. |
| SENSE | Auxiliary voltage monitor input | Compares external voltage (e.g., via resistor divider) to 0.551V reference; asserts RSTSENSE if below threshold. |
| RSTVDD | Open-drain reset output (VDD domain) | Active-low signal indicating VDD undervoltage; requires external pullup to appropriate rail (e.g., 3.3V). |
| RSTSENSE | Open-drain reset output (SENSE domain) | Active-low signal indicating auxiliary rail undervoltage; independently controlled, enabling multi-rail system reset sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent reset outputs | RSTVDD and RSTSENSE provide separate, asynchronous reset signals for main and auxiliary power domains-enabling clean multi-rail power sequencing without external logic. |
| Ultralow 1.2μA supply current | Reduces standby power in battery-critical applications (e.g., IoT sensors, wearables) by >90% versus standard supervisors, extending operational lifetime. |
| 0.75% VDD threshold accuracy | Guarantees precise 3.3V rail supervision across temperature and process variation-eliminates need for external calibration or margining. |
| 130ms factory-trimmed reset delay | Ensures deterministic, jitter-free reset timing for ARM Cortex-M and RISC-V processors without requiring external RC networks or firmware delays. |
| SENSE input with 0.551V reference | Supports monitoring of any rail ≥0.551V (e.g., 1.2V, 1.5V, 1.8V) using two 1% resistors-no additional reference IC or ADC required. |
Applications
| Microcontroller Power Sequencing | Battery Voltage Monitoring |
|---|---|
Use Scenario: A dual-rail system powers an MCU core (1.2V) and I/O (3.3V); both rails must stabilize before boot. IC Role / Device Role / Timing Role: TPS3106K33DBVRG4 monitors VDD (3.3V) and SENSE (1.2V via divider), asserting RSTVDD and RSTSENSE independently until both rails exceed thresholds. Use Value: Prevents MCU lockup due to premature release of reset on either rail-ensures deterministic boot across temperature and load conditions. | Use Scenario: A handheld medical device uses two NiMH cells (2.4V nominal); system shuts down at 2.0V to preserve battery health. IC Role / Device Role / Timing Role: SENSE pin monitors battery voltage via 1.9× resistor divider; RSTSENSE triggers shutdown when voltage falls below 2.0V (mapped to 0.551V at SENSE). Use Value: Achieves <2μA total quiescent current during shutdown-extending shelf life and runtime without sacrificing voltage accuracy. |
| Industrial Sensor Node Reset | Low-Power DSP Supervision |
Use Scenario: An IP67-rated environmental sensor operates in remote locations with intermittent solar charging; brownout resilience is critical. IC Role / Device Role / Timing Role: TPS3106K33DBVRG4 supervises the 3.3V LDO output (VDD) and backup supercap voltage (SENSE), providing independent reset flags for fault logging. Use Value: Dual outputs enable firmware to distinguish between main rail collapse and backup failure-supporting predictive maintenance and graceful degradation. | Use Scenario: A voice-activated edge AI module uses a low-power DSP with strict 3.3V supply tolerance; transient dips must not cause silent corruption. IC Role / Device Role / Timing Role: RSTVDD asserts within 40μs of VDD dropping below 2.941V, holding DSP in reset until stable-preventing instruction fetch errors. Use Value: 50mV hysteresis eliminates chatter during marginal supply conditions, while 1.2μA current avoids loading the weak LDO during sleep modes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3106K33DBVT | Same electrical specs and pinout; tape-and-reel packaging (250-unit reel vs. 3000-unit reel for DBVRG4) | No functional difference; suited for prototyping or low-volume production where smaller reels reduce inventory cost | Select DBVT for evaluation or pilot runs; DBVRG4 for high-volume manufacturing with automated placement. |
| TLV809E33DBVR | Single-output (RESET only), no SENSE input; 1.8μA supply current; same 3.3V threshold and 140ms delay | Lacks dual-monitoring capability-cannot supervise auxiliary rails; higher quiescent current reduces battery life in ultra-low-power designs | Choose TLV809E33DBVR only when only VDD supervision is needed and board space allows trade-off of feature set for cost. |
Compared with TPS3106K33DBVRG4, the DBVT variant offers identical performance in smaller packaging for flexibility, while TLV809E33DBVR sacrifices SENSE functionality and adds 0.6μA supply current-making it unsuitable for dual-rail or sub-2μA battery systems.
Availability
TPS3106K33DBVRG4 is available at Aetrix Electronics and suitable for industrial sensor nodes, battery-powered medical devices, and low-power DSP systems requiring stable component supply with guaranteed long-term availability.
Supply support for TPS3106K33DBVRG4 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 power management technologies, with decades of expertise in high-reliability supervisory circuits.
The TPS31xx family was designed specifically for ultra-low-power, precision voltage monitoring in battery-critical and thermally demanding applications-emphasizing sub-2μA operation, wide temperature range, and dual-threshold flexibility.
FAQ
What is the exact VDD threshold voltage of the TPS3106K33DBVRG4?
The TPS3106K33DBVRG4 has a nominal VDD threshold of 2.941V at 25°C, with a guaranteed range of 2.919V to 2.963V (±0.75%). Over –40°C to 125°C, the threshold varies from 2.823V to 3.058V, maintaining tight accuracy for 3.3V rail supervision without external trimming.
Does the TPS3106K33DBVRG4 include a watchdog timer?
No, the TPS3106K33DBVRG4 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 in the TPS3110 series. The TPS3106K33DBVRG4 is strictly a voltage supervisor with manual reset and dual-sense capability.
Can the TPS3106K33DBVRG4 monitor a 1.2V rail using the SENSE pin?
Yes, the TPS3106K33DBVRG4 can monitor a 1.2V rail using the SENSE pin by connecting it through a precision resistor divider. With a fixed 0.551V internal reference at SENSE, a 1.2V rail maps to a divider ratio of ~2.18:1 (e.g., R1 = 1.18MΩ, R2 = 540kΩ, 1% tolerance). The device asserts RSTSENSE when the divided voltage falls below 0.551V.
What is the reset delay time of the TPS3106K33DBVRG4 and how is it triggered?
The TPS3106K33DBVRG4 has a fixed 130ms (typ) reset delay time. This delay begins only after VDD rises above the threshold voltage plus hysteresis (VIT– + VHYS ≈ 2.991V), ensuring the supply is fully stabilized before releasing reset. The timer is internal, factory-trimmed, and requires no external components.
Is the TPS3106K33DBVRG4 pin-compatible with other TPS3106 variants like TPS3106E15DBVR?
Yes, all TPS3106x variants-including TPS3106K33DBVRG4 and TPS3106E15DBVR-share identical 6-pin SOT-23 (DBV) packaging and pinout. The only differences are the VDD threshold voltage (3.3V vs. 1.5V) and corresponding part number suffix; electrical behavior, timing, and interface remain fully compatible across the family.
TPS3106K33DBVRG4 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
TPS3106K33DBVRG4 FAQ
1.How can I place an order for TPS3106K33DBVRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3106K33DBVRG4 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 TPS3106K33DBVRG4 reliable?
The price and inventory of TPS3106K33DBVRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3106K33DBVRG4 is usually 5 days.
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TPS3106K33DBVRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3106K33DBVRG4 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 TPS3106K33DBVRG4?
For technical support, including TPS3106K33DBVRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3106K33DBVRG4 requirements.
6.How does Aetrix verify that TPS3106K33DBVRG4 is sourced from the original manufacturer or authorized distributors?
All TPS3106K33DBVRG4 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 TPS3106K33DBVRG4 meets industry standards.
7.What is the process for return or replacement of TPS3106K33DBVRG4?
All TPS3106K33DBVRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS3106K33DBVRG4, 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 TPS3106K33DBVRG4 part is unused and in its original packaging.
Return procedure for TPS3106K33DBVRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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