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Texas Instruments TPS3808EG09DBVR
- Part No.:
- TPS3808EG09DBVR
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
TPS3808EG09DBVR.pdf
- Description:
- 600NA ULTRA-LOW QUIESCENT CURREN
- Quantity:
- Payment:
- Shipping:
Inventory:2,970
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Product details
Overview
TPS3808EG09DBVR from Texas Instruments is a low-quiescent-current, fixed-threshold supervisory circuit with 0.9V undervoltage detection, ±0.5% threshold accuracy, 0.6μA typical supply current, and user-programmable reset delay from 1.25ms to 10s in a 6-pin SOT-23 package. It monitors power rails in battery-powered or thermally constrained systems such as surgical equipment and DC-input BLDC motor drives.
For engineers reviewing the TPS3808EG09DBVR datasheet, TPS3808EG09DBVR pinout, TPS3808EG09DBVR application, or TPS3808EG09DBVR equivalent, key selection considerations include its 0.9V fixed threshold, open-drain RESET output requiring external pull-up, separate SENSE/VDD pins for rail isolation, -40°C to +125°C operation, and CT-pin programmable delay configuration.
Technical Context
The TPS3808EG09DBVR implements a precision voltage comparator with internal 0.5% threshold accuracy referenced to a stable bandgap, hysteresis of 1–2.5% of VIT, and glitch immunity of 5µs on SENSE and 50ns on MR. Its reset assertion logic follows a strict truth table where RESET goes low if either SENSE < 0.84V or MR < 0.3×VDD.
Reset de-assertion requires both SENSE > VIT + VHYS and MR > 0.7×VDD, followed by a precisely timed delay generated by an internal 220nA current source charging an external capacitor on the CT pin - enabling delay tuning from 1.25ms (130pF) to 10s (150nF) without affecting quiescent current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Threshold Voltage | Fixed 0.84V (nominal), ±0.5% accuracy ensures reliable 0.9V rail monitoring across temperature |
| Quiescent Current | 0.6μA typical at 3.3V enables multi-year battery life in always-on monitoring applications |
| Reset Delay Range | 1.25ms–10s via CT pin capacitor; supports fast startup (MCU boot) or long hold-off (power sequencing) |
| Operating Temperature | -40°C to +125°C junction range allows deployment in industrial motor drives and medical equipment |
| Supply Voltage Range | 1.7V to 6V accommodates wide input rails including Li-ion battery stacks and post-regulated supplies |
| Output Type | Open-drain RESET with 400mV max VOL at 1mA supports level-shifting up to 6V with external pull-up |
| SENSE Input Bias | ≤1.25μA leakage at 6V minimizes error in high-impedance resistor-divider monitoring circuits |
Pinout & Package
Package: SOT-23 (DBV), 6-pin, 2.90mm × 1.60mm body size, surface-mount, RoHS-compliant, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: RESET | Open-drain output | Asserts low during undervoltage or manual reset; requires 10kΩ–1MΩ external pull-up to set logic-high voltage |
| 2: GND | Ground reference | Primary return path for internal circuitry and CT capacitor discharge; must be low-impedance |
| 3: MR | Manual reset input | Logic-low (≤0.3×VDD) forces immediate RESET assertion; internally pulled up to VDD via 90kΩ |
| 4: CT | Delay timing control | Connects to external capacitor (≥130pF) to set reset timeout; open = 20ms, tied to VDD = 300ms |
| 5: SENSE | Monitoring input | Direct connection to monitored rail; comparator trips at 0.84V with hysteresis to reject noise |
| 6: VDD | Supply input | Power source for internal circuitry; requires 0.1μF ceramic decoupling capacitor placed adjacent to pin |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 0.9V threshold | Eliminates external resistor divider, reducing BOM count and layout area for standard 0.9V rail monitoring |
| 0.6μA quiescent current | Enables continuous supervision in energy-harvesting or coin-cell-powered devices without measurable battery drain |
| Separate SENSE and VDD pins | Allows independent monitoring of a different rail than the supervisor's supply (e.g., monitor 0.9V core while powered from 3.3V) |
| CT-pin programmable delay | Supports precise timing alignment with system power-up sequences without firmware involvement or additional timers |
| 125°C operational rating | Validates use in under-hood automotive modules, industrial inverters, and sealed medical enclosures without derating |
Applications
| Rack Server Motherboard | Electricity Meter |
|---|---|
Use Scenario: Monitors 0.9V FPGA configuration rail during cold-start and brownout conditions. IC Role / Device Role / Timing Role: Undervoltage supervisor asserting open-drain RESET to halt FPGA configuration until stable 0.9V is confirmed. Use Value: Prevents bitstream corruption by ensuring FPGA only loads configuration after rail settles within ±1% of 0.9V for ≥20ms. | Use Scenario: Supervises ultra-low-power 0.9V real-time clock (RTC) supply in tamper-resistant meter housing. IC Role / Device Role / Timing Role: Continuous rail monitor with sub-1μA current draw, asserting RESET to suspend meter logging during battery sag. Use Value: Extends CR2032 battery life beyond 10 years while guaranteeing RTC integrity during grid interruptions. |
| DC-Input BLDC Motor Drive | Surgical Equipment |
Use Scenario: Validates 0.9V gate driver bias supply before enabling IGBT half-bridge PWM. IC Role / Device Role / Timing Role: Safety-critical power-on enable signal generator with 100ms programmable delay to coordinate auxiliary supply ramp-up. Use Value: Eliminates shoot-through risk by enforcing minimum 100ms delay between gate driver supply stabilization and PWM enable. | Use Scenario: Monitors isolated 0.9V analog sensor supply in battery-operated handheld surgical tool. IC Role / Device Role / Timing Role: Low-noise, high-accuracy supervisor ensuring sensor ADC reference stability before procedure initiation. Use Value: Guarantees ±0.5% threshold accuracy over full -40°C to +125°C range, critical for calibrated tissue impedance measurement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G09DBVR | Same pinout and threshold, but standard-grade (-40°C to +85°C) and higher 1.5μA max IDD | Limited to commercial-temperature environments; unsuitable for motor drive or surgical thermal profiles | Select only if operating ambient stays below 85°C and higher quiescent current is acceptable |
| MAX6326LT09D2T | 0.9V threshold, SOT-23-5, no MR pin, fixed 200ms delay, 1.6μA IDD | Lacks manual reset and adjustable delay; smaller footprint but less flexible timing control | Choose when board space is critical and fixed delay suffices; verify absence of MR does not compromise system safety logic |
Compared with TPS3808EG09DBVR, TPS3808G09DBVR trades extended temperature capability and ultra-low current for cost reduction in benign environments, while MAX6326LT09D2T sacrifices configurability and current efficiency for minimal footprint - making TPS3808EG09DBVR optimal for thermally demanding, battery-sensitive, or timing-flexible designs.
Availability
TPS3808EG09DBVR is available at Aetrix Electronics and suitable for rack server motherboard design, electricity meter production, and DC-input BLDC motor drive development requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for TPS3808EG09DBVR 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 headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The TPS3808E product line was engineered specifically for ultra-low-power, high-accuracy power-rail supervision in thermally aggressive and battery-constrained applications - emphasizing precision threshold stability, minimal IDD, and flexible reset timing without sacrificing reliability.
FAQ
What is the exact threshold voltage and accuracy of the TPS3808EG09DBVR?
The TPS3808EG09DBVR has a nominal threshold voltage of 0.84V (corresponding to a 0.9V nominal supply rail) with ±0.5% accuracy over -40°C to +125°C. This specification is guaranteed by TI's precision internal reference and applies directly to the SENSE pin; it does not require external calibration or trimming.
Can the TPS3808EG09DBVR monitor a voltage rail different from its own supply voltage?
Yes. The TPS3808EG09DBVR uses separate SENSE and VDD pins, allowing it to monitor a 0.9V rail (connected to SENSE) while being powered from a different supply such as 3.3V or 5V (applied to VDD). This isolation prevents supply interaction and enables accurate low-voltage rail supervision in multi-rail systems.
How is the reset delay time configured on the TPS3808EG09DBVR?
The reset delay on the TPS3808EG09DBVR is set via the CT pin: leaving CT open yields 20ms, connecting CT to VDD via a 40kΩ–200kΩ resistor gives 300ms, and connecting CT to GND through a capacitor (≥130pF) enables user-adjustable delays from 1.25ms to 10s. The delay is generated by an internal 220nA current source charging the capacitor.
Does the TPS3808EG09DBVR require an external pull-up resistor on the RESET pin?
Yes. The TPS3808EG09DBVR features an open-drain RESET output that must be pulled up externally with a resistor between 10kΩ and 1MΩ. This allows the RESET signal to interface with logic families operating at voltages up to 6V, independent of the TPS3808EG09DBVR's VDD level.
What is the maximum operating temperature and thermal performance of the TPS3808EG09DBVR?
The TPS3808EG09DBVR is fully specified from -40°C to +125°C junction temperature and packaged in a SOT-23 (DBV) with RθJA = 210.8°C/W. Its 0.6μA quiescent current minimizes self-heating, making it suitable for sealed enclosures and high-ambient environments like motor drive power stages and surgical tools.
TPS3808EG09DBVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- -
- Type:
- Monitor
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 0.84V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 180ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
TPS3808EG09DBVR FAQ
1.How can I place an order for TPS3808EG09DBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3808EG09DBVR 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 TPS3808EG09DBVR reliable?
The price and inventory of TPS3808EG09DBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3808EG09DBVR is usually 5 days.
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Once your TPS3808EG09DBVR 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 TPS3808EG09DBVR?
For technical support, including TPS3808EG09DBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3808EG09DBVR requirements.
6.How does Aetrix verify that TPS3808EG09DBVR is sourced from the original manufacturer or authorized distributors?
All TPS3808EG09DBVR 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 TPS3808EG09DBVR meets industry standards.
7.What is the process for return or replacement of TPS3808EG09DBVR?
All TPS3808EG09DBVR units undergo pre-shipment inspection (PSI). If there is an issue with TPS3808EG09DBVR, 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 TPS3808EG09DBVR part is unused and in its original packaging.
Return procedure for TPS3808EG09DBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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