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Texas Instruments TPS3806I33DBVR
- Part No.:
- TPS3806I33DBVR
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
TPS3806I33DBVR.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:7,546
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Product details
Overview
TPS3806I33DBVR from Texas Instruments is a dual voltage detector IC with fixed 3.0 V VDD-sense threshold and adjustable LSENSE input (1.207 V nominal), featuring independent open-drain RESET and RSTSENSE outputs, 3 µA typical supply current at 3.3 V, and operation from -40°C to +85°C in battery monitoring circuits for Li-ion-powered portable electronics.
For engineers reviewing the TPS3806I33DBVR datasheet, TPS3806I33DBVR pinout, TPS3806I33DBVR application, or TPS3806I33DBVR 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 extended battery life.
Technical Context
The TPS3806I33DBVR 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 hysteresis by setting an upper trip point for the LSENSE channel.
Both RESET and RSTSENSE are active-low open-drain outputs requiring external pull-up resistors. The device asserts outputs when VDD or LSENSE falls below their respective thresholds and deasserts them only after crossing the hysteresis-adjusted upper threshold, ensuring noise immunity in noisy battery environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Threshold | 3.0 V ±22 mV (2.978–3.022 V) - ensures reliable microcontroller reset during 3.3 V system brownout |
| LSENSE Reference | 1.207 V ±16 mV - enables precise battery voltage monitoring using external resistor dividers |
| Supply Current | 3 µA typical at 3.3 V - minimizes battery drain in always-on supervision applications |
| Operating Temp | -40°C to +85°C - supports industrial and portable equipment deployment across wide ambient conditions |
| Reset Delay | 5–100 µs propagation - provides fast, deterministic response to voltage faults without excessive timing uncertainty |
| Hysteresis Range | 60–90 mV - configurable via HSENSE to prevent chatter near threshold during slow battery discharge |
| Output Type | Independent open-drain outputs - allows flexible pull-up to different rail voltages (e.g., RESET to VDD, RSTSENSE to battery) |
Pinout & Package
SOT-23-6 (DBV) package: 2.9 mm × 1.6 mm × 1.45 mm body, lead pitch 0.95 mm, RoHS-compliant NIPDAU finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RSTSENSE (Pin 1) | Active-low open-drain output | Asserts when LSENSE voltage drops below 1.207 V; requires external pull-up to battery or system rail |
| GND (Pin 2) | Ground reference | Common return path for all internal comparators and output drivers; must be low-impedance |
| RESET (Pin 3) | Active-low open-drain output | Asserts when VDD drops below 3.0 V; typically pulled up to 3.3 V rail for MCU reset signaling |
| VDD (Pin 4) | Supply input & fixed sense node | Power source (1.3–6 V) and direct input to VDD comparator; bypass capacitor required per datasheet |
| LSENSE (Pin 5) | Adjustable sense input | Monitors divided battery voltage; high-impedance (±25 nA input current) to minimize divider loading |
| HSENSE (Pin 6) | Hysteresis programming input | Sets upper trip point for LSENSE channel; enables stable window detection without external components |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent detectors | Simultaneous monitoring of main supply (VDD) and battery (LSENSE) enables coordinated power sequencing and fault isolation |
| Adjustable hysteresis | HSENSE pin allows user-defined window width (60–90 mV) to eliminate false resets during gradual voltage decay |
| Guaranteed reset at 0.8 V | Ensures functional reset assertion even during deep brownout or cold-start conditions before full VDD ramp-up |
| Low 3 µA quiescent current | Extends shelf life and runtime in battery-backed systems where supervision remains active indefinitely |
| 6-pin SOT-23 footprint | Minimizes PCB area and cost vs. larger packages; compatible with standard pick-and-place and reflow processes |
Applications
| Li-ion Battery Protection | Microcontroller Power Supervision |
|---|---|
Use Scenario: Monitoring single-cell Li-ion battery voltage during discharge to prevent over-discharge damage. IC Role / Device Role / Timing Role: TPS3806I33DBVR acts as a dual-threshold supervisor: LSENSE tracks battery voltage via resistor divider, while VDD monitors system rail integrity. Use Value: Prevents irreversible cell degradation by asserting RSTSENSE at 2.8 V (programmed via divider), while maintaining system reset via RESET until VDD stabilizes. |
Use Scenario: Ensuring clean reset initiation and release for ARM Cortex-M microcontrollers in portable medical devices. IC Role / Device Role / Timing Role: TPS3806I33DBVR provides synchronized, hysteresis-stabilized reset signaling to the MCU's nRESET pin during power-up and brownout events. Use Value: Eliminates reset glitches caused by supply ripple; 5–100 µs delay ensures timing compliance with ARM reset hold-time requirements. |
| Industrial Sensor Node | USB-C Power Negotiation Backup |
Use Scenario: Maintaining reliable operation of LoRaWAN sensor nodes powered by primary lithium batteries with no recharge path. IC Role / Device Role / Timing Role: TPS3806I33DBVR supervises both battery voltage (LSENSE) and regulated 3.3 V rail (VDD), triggering graceful shutdown before critical undervoltage. Use Value: Enables firmware-controlled data save and radio shutdown using RSTSENSE as wake-up interrupt source, extending usable battery capacity by 12%. |
Use Scenario: Providing fallback reset control when USB-C PD controller fails to negotiate proper VBUS voltage during adapter hot-plug. IC Role / Device Role / Timing Role: TPS3806I33DBVR monitors VBUS directly (VDD) and battery backup voltage (LSENSE), asserting RESET if VBUS collapses below 3.0 V. Use Value: Guarantees system reset within 100 µs of VBUS failure, preventing corrupted state transitions during PD negotiation loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3806J20DBVR | Fixed VDD threshold of 1.8 V instead of 3.0 V; identical LSENSE reference (1.207 V) and hysteresis architecture | Targeted for 1.8 V/2.5 V logic domains rather than 3.3 V systems; unsuitable for direct replacement in 3.3 V reset chains | Select only when supervising sub-2.0 V rails; requires redesign of VDD connection and reset pull-up voltage |
| MAX6326UT31D3+T | Single 3.08 V reset threshold, no LSENSE/HSENSE inputs; 1.6 µA supply current; SC70-5 package | Provides only main-rail supervision-no battery voltage monitoring capability; lacks dual-output flexibility | Choose when only VDD supervision is needed and board space permits SC70; not a functional substitute for dual-sense use cases |
Compared with TPS3806J20DBVR and MAX6326UT31D3+T, the TPS3806I33DBVR uniquely delivers simultaneous 3.0 V VDD and programmable battery monitoring in a single SOT-23-6 package, enabling compact, low-power dual-rail supervision without external comparators or logic.
Availability
TPS3806I33DBVR is available at Aetrix Electronics and suitable for Li-ion battery protection, microcontroller power supervision, industrial sensor nodes, USB-C power negotiation backup, and portable medical device designs requiring stable component supply and long-term lifecycle support.
Supply support for TPS3806I33DBVR 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 interface solutions.
The TPS3806 family was designed specifically for dual-rail voltage supervision in battery-powered portable electronics, emphasizing ultra-low quiescent current, adjustable hysteresis, and guaranteed low-voltage reset functionality.
FAQ
What is the exact VDD threshold voltage specification for TPS3806I33DBVR?
The TPS3806I33DBVR 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 internally generated and does not require external components.
How does the LSENSE input function in TPS3806I33DBVR?
The LSENSE input of the TPS3806I33DBVR compares an externally applied voltage-typically derived from a resistor divider across a battery-to a precision 1.207 V internal reference. When LSENSE falls below this value, RSTSENSE is asserted low; hysteresis is added via the HSENSE pin to prevent oscillation near the threshold.
Can TPS3806I33DBVR operate with supply voltages below 3.0 V?
Yes, the TPS3806I33DBVR operates with VDD as low as 1.3 V and guarantees reset assertion down to 0.8 V. However, its VDD-sense threshold remains fixed at 3.0 V; thus, RESET will not activate unless VDD rises above that level first, making it suitable for systems where 3.3 V rail startup must be validated.
What is the purpose of the HSENSE pin on TPS3806I33DBVR?
The HSENSE pin on TPS3806I33DBVR sets the upper trip point for the LSENSE comparator, enabling user-programmable hysteresis. By applying a voltage higher than the LSENSE threshold, it defines a window (60–90 mV wide) that prevents repeated toggling of RSTSENSE during slow or noisy battery voltage transitions near the trip point.
Is TPS3806I33DBVR pin-compatible with other devices in the TPS3806 family?
Yes, all TPS3806 variants-including TPS3806J20DBVR and TPS3806I33DBVR-share identical SOT-23-6 (DBV) pinout and package dimensions. However, VDD threshold differs between variants (1.8 V vs. 3.0 V), so direct substitution requires verification of system rail compatibility and may necessitate changes to reset pull-up configuration.
TPS3806I33DBVR 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:
- 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
TPS3806I33DBVR FAQ
1.How can I place an order for TPS3806I33DBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3806I33DBVR 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 TPS3806I33DBVR reliable?
The price and inventory of TPS3806I33DBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3806I33DBVR is usually 5 days.
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Once your TPS3806I33DBVR 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 TPS3806I33DBVR?
For technical support, including TPS3806I33DBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3806I33DBVR requirements.
6.How does Aetrix verify that TPS3806I33DBVR is sourced from the original manufacturer or authorized distributors?
All TPS3806I33DBVR 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 TPS3806I33DBVR meets industry standards.
7.What is the process for return or replacement of TPS3806I33DBVR?
All TPS3806I33DBVR units undergo pre-shipment inspection (PSI). If there is an issue with TPS3806I33DBVR, 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 TPS3806I33DBVR part is unused and in its original packaging.
Return procedure for TPS3806I33DBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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