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Texas Instruments TPS3806I33DBVRG4
- Part No.:
- TPS3806I33DBVRG4
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
TPS3806I33DBVRG4.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,316
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Product details
Overview
TPS3806I33DBVRG4 from Texas Instruments is a dual-voltage supervisor IC with fixed 3.0 V VDD-sense threshold and adjustable LSENSE input (1.207 V nominal), independent open-drain RESET and RSTSENSE outputs, 3 µA typical supply current at 3.3 V, and operation from -40°C to +85°C - used for battery voltage monitoring and power-on reset in portable Li-ion systems.
For engineers reviewing the TPS3806I33DBVRG4 datasheet, TPS3806I33DBVRG4 pinout, TPS3806I33DBVRG4 application, or TPS3806I33DBVRG4 equivalent, key selection criteria include dual-threshold supervision capability, adjustable hysteresis via HSENSE, guaranteed reset assertion down to 0.8 V VDD, SOT-23-6 package compatibility, and low-quiescent-current operation for battery longevity.
Technical Context
The TPS3806I33DBVRG4 integrates two independent comparators: one monitors VDD against a fixed internal 3.0 V threshold (VIT = 2.978–3.022 V at 25°C), while the other monitors LSENSE against a precision 1.207 V reference. HSENSE enables programmable upper trip point to set hysteresis width (60–90 mV depending on VIT range).
Both RESET and RSTSENSE are active-low open-drain outputs requiring external pull-ups; propagation delays are 5–100 µs; supply current remains stable across 1.3–6 V VDD and full temperature range; input bias current is ±25 nA at LSENSE/HSENSE.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Threshold | 3.0 V (2.978–3.022 V at 25°C); fixed internal divider enables reliable microcontroller reset at nominal 3.3 V rail |
| LSENSE Threshold | 1.207 V (1.198–1.216 V at 25°C); precise internal reference allows accurate battery voltage monitoring via external resistor divider |
| Hysteresis Range | 60–90 mV; configurable via HSENSE pin to prevent chatter during slow voltage transitions near trip point |
| Supply Current | 3 µA typical at 3.3 V; ultra-low quiescent draw extends battery life in always-on monitoring applications |
| Operating Temp | -40°C to +85°C; qualified for industrial and portable equipment environments without derating |
| Reset Delay | 5–100 µs; fast response ensures timely system initialization after power-up or brownout recovery |
| Output Type | Independent open-drain RESET (VDD-triggered) and RSTSENSE (LSENSE-triggered); supports flexible pull-up voltage domain assignment |
Pinout & Package
TPS3806I33DBVRG4 is housed in a 6-pin SOT-23 (DBV) package, 2.9 mm × 1.6 mm × 1.45 mm, RoHS-compliant, moisture sensitivity level 1, lead finish NIPDAU.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RSTSENSE (Pin 1) | Active-low open-drain output | Asserts when LSENSE voltage falls below 1.207 V; requires external pull-up; isolates battery-monitoring reset from main supply reset |
| GND (Pin 2) | Ground reference | Common return path for all internal circuitry and external resistor dividers; must be low-impedance for threshold accuracy |
| RESET (Pin 3) | Active-low open-drain output | Asserts when VDD falls below 3.0 V; independent of LSENSE path; enables primary system reset coordination |
| VDD (Pin 4) | Supply input & fixed sense node | Power source (1.3–6 V) and direct input to internal 3.0 V comparator; bypass capacitor required per datasheet |
| LSENSE (Pin 5) | Adjustable sense input | High-impedance (±25 nA) input for external resistor divider; sets lower trip point for battery or auxiliary rail monitoring |
| HSENSE (Pin 6) | Hysteresis control input | Configures upper trip point to define hysteresis window; enables stable switching without external components |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent supervision paths | Simultaneous monitoring of main supply (VDD) and battery/auxiliary rail (LSENSE) with separate reset outputs avoids single-point failure |
| Adjustable hysteresis via HSENSE | Eliminates need for external hysteresis resistors; simplifies BOM and layout while enabling precise noise margin tuning |
| Guaranteed reset at 0.8 V VDD | Ensures functional reset assertion even during deep brownout or cold-start conditions before full regulator enable |
| Low 3 µA supply current | Reduces standby power loss by >90% vs. legacy supervisors; critical for multi-year battery-powered IoT endpoints |
| SOT-23-6 footprint | Enables high-density PCB layouts; compatible with standard pick-and-place and reflow processes; no thermal pad required |
Applications
| Li-ion Battery Protection | Microcontroller Power Sequencing |
|---|---|
|
Use Scenario: Monitoring single-cell Li-ion battery voltage during discharge to prevent over-discharge damage. IC Role / Device Role / Timing Role: TPS3806I33DBVRG4 acts as dedicated battery supervisor, asserting RSTSENSE when cell voltage drops below 3.0 V (via LSENSE divider), holding system in reset until recharge. Use Value: Prevents irreversible capacity loss by enforcing 3.0 V cutoff; hysteresis via HSENSE avoids oscillation near threshold during load transients. |
Use Scenario: Ensuring clean power-on reset for an ARM Cortex-M4 MCU powered from a 3.3 V LDO. IC Role / Device Role / Timing Role: TPS3806I33DBVRG4 monitors VDD and asserts RESET until stable 3.3 V is reached, synchronizing boot sequence with power rail integrity. Use Value: Guarantees deterministic startup by eliminating marginal reset timing; 5 µs min delay ensures sufficient power ramp time. |
| Portable Medical Sensors | Industrial Data Loggers |
|
Use Scenario: Supervising dual-rail power (3.3 V logic + 1.8 V analog) in a handheld ECG sensor with coin-cell backup. IC Role / Device Role / Timing Role: TPS3806I33DBVRG4 uses LSENSE to monitor backup battery and VDD to supervise main rail, generating independent reset signals for each domain. Use Value: Enables graceful shutdown and state preservation when main power fails; 3 µA current preserves months of backup runtime. |
Use Scenario: Long-term environmental monitoring node deployed in remote locations with solar-charged Li-ion battery. IC Role / Device Role / Timing Role: TPS3806I33DBVRG4 supervises both battery voltage (LSENSE) and system VDD, triggering controlled sleep mode or data flush before shutdown. Use Value: Extends field deployment interval by minimizing false resets; hysteresis prevents repeated wake/sleep cycles during partial cloud cover. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-threshold voltage supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3806J20DBVR | Fixed VDD threshold = 1.8 V (vs. 3.0 V); identical LSENSE = 1.207 V, hysteresis, and package | Targeted for 1.8 V core logic systems; unsuitable for 3.3 V MCU reset without level-shifting | Select only if main supply is 1.8 V; otherwise TPS3806I33DBVRG4 provides correct VDD threshold match |
| MAX6816EUT+T | Single-channel, 3.08 V fixed threshold, no adjustable LSENSE or HSENSE; 1.6 µA supply current; SOT-23-5 | Lacks dual-path supervision and hysteresis programming; limited to basic VDD monitoring | Use only when only one rail needs supervision and hysteresis is not required; TPS3806I33DBVRG4 adds critical battery monitoring capability |
Compared with TPS3806J20DBVR, TPS3806I33DBVRG4 provides correct 3.0 V VDD threshold alignment for 3.3 V systems; compared with MAX6816EUT+T, it delivers essential dual-rail supervision and programmable hysteresis - making it the only option supporting battery-aware reset sequencing in compact portable designs.
Availability
TPS3806I33DBVRG4 is available at Aetrix Electronics and suitable for Li-ion battery protection, microcontroller power sequencing, portable medical sensors, and industrial data loggers requiring stable component supply and long-lifecycle support.
Supply support for TPS3806I33DBVRG4 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 with emphasis on reliability, energy efficiency, and system-level integration.
The TPS3806 family is designed specifically for dual-rail voltage supervision in battery-powered and portable electronics, combining precision thresholds, ultra-low power, and hysteresis configurability in minimal footprint.
FAQ
What is the exact VDD threshold voltage specification for TPS3806I33DBVRG4?
The TPS3806I33DBVRG4 has a nominal VDD threshold of 3.0 V, with a guaranteed range of 2.978 V to 3.022 V at +25°C and 2.94 V to 3.06 V across the full -40°C to +85°C operating temperature range. This fixed threshold is set by an internal resistor divider and applies directly to the VDD pin for primary supply monitoring.
How does the LSENSE input function in TPS3806I33DBVRG4, and what is its threshold accuracy?
The LSENSE input of the TPS3806I33DBVRG4 monitors an external voltage divider connected to a battery or auxiliary rail, comparing it to a precision 1.207 V internal reference. Its threshold is specified as 1.198 V to 1.216 V at +25°C and 1.183 V to 1.231 V over temperature, enabling accurate low-voltage detection with minimal external components.
Can TPS3806I33DBVRG4 provide hysteresis without external resistors?
Yes - the TPS3806I33DBVRG4 implements programmable hysteresis via the HSENSE pin, which accepts an externally derived upper threshold voltage. By connecting HSENSE to a resistor divider tap above the LSENSE node, users configure a 60–90 mV hysteresis window without adding comparators or feedback resistors, simplifying design and improving noise immunity.
What are the absolute maximum ratings for TPS3806I33DBVRG4 supply voltage and I/O pins?
The TPS3806I33DBVRG4 has an absolute maximum VDD rating of 7 V, and all other pins (LSENSE, HSENSE, RESET, RSTSENSE, GND) tolerate -0.3 V to 7 V. Exceeding these limits risks permanent damage. For reliable operation, continuous VDD operation above 6 V is not recommended beyond 1000 hours.
Is TPS3806I33DBVRG4 pin-compatible with other devices in the TPS3806 family?
Yes - all TPS3806 variants, including TPS3806J20DBVR and TPS3806I33DBVRG4, share identical 6-pin SOT-23 (DBV) packaging and pinout. However, VDD threshold differs (1.8 V vs. 3.0 V), so direct substitution requires verification of supply rail compatibility and potential redesign of associated reset logic.
TPS3806I33DBVRG4 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:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 3V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 5µs Typical Propagation Delay
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
TPS3806I33DBVRG4 FAQ
1.How can I place an order for TPS3806I33DBVRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3806I33DBVRG4 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 TPS3806I33DBVRG4 reliable?
The price and inventory of TPS3806I33DBVRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3806I33DBVRG4 is usually 5 days.
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Once your TPS3806I33DBVRG4 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 TPS3806I33DBVRG4?
For technical support, including TPS3806I33DBVRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3806I33DBVRG4 requirements.
6.How does Aetrix verify that TPS3806I33DBVRG4 is sourced from the original manufacturer or authorized distributors?
All TPS3806I33DBVRG4 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 TPS3806I33DBVRG4 meets industry standards.
7.What is the process for return or replacement of TPS3806I33DBVRG4?
All TPS3806I33DBVRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS3806I33DBVRG4, 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 TPS3806I33DBVRG4 part is unused and in its original packaging.
Return procedure for TPS3806I33DBVRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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