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Texas Instruments TPS3808EG30DBVR
- Part No.:
- TPS3808EG30DBVR
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
TPS3808EG30DBVR.pdf
- Description:
- 600NA ULTRA-LOW QUIESCENT CURREN
- Quantity:
- Payment:
- Shipping:
Inventory:2,990
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Product details
Overview
TPS3808EG30DBVR from Texas Instruments is a low-quiescent-current, fixed-threshold supervisory circuit with 2.79 V undervoltage detection, 20 ms to 10 s programmable reset delay, open-drain RESET output, and -40°C to +125°C operating range. It monitors 3.0 V power rails in battery-powered or thermally demanding systems such as BLDC motor drives and electricity meters.
For engineers reviewing the TPS3808EG30DBVR datasheet, TPS3808EG30DBVR pinout, TPS3808EG30DBVR application, or TPS3808EG30DBVR equivalent, key selection criteria include threshold accuracy (±0.5% typ), ultra-low 0.6 µA quiescent current, SOT-23-6 package compatibility, CT-pin-based delay configuration, and MR input support for system-initiated resets.
Technical Context
The TPS3808EG30DBVR implements a precision bandgap reference and comparator architecture to achieve ±0.5% threshold accuracy over temperature. Its reset assertion logic responds to either SENSE voltage falling below 2.79 V or MR pin driven low, with hysteresis (1–2.5%) preventing chatter during threshold crossings.
Reset deassertion requires both SENSE > 2.79 V + VHYS and MR high, followed by a user-configurable delay set via CT pin: open (20 ms), resistor-to-VDD (300 ms), or capacitor-to-GND (1.25 ms–10 s). The open-drain RESET output supports pull-up voltages up to 6 V and requires external 10 kΩ–1 MΩ pull-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Threshold Voltage | 2.79 V nominal; enables reliable monitoring of 3.0 V rails with ±0.5% accuracy over -40°C to +125°C |
| Quiescent Current | 0.6 µA typical at 3.3 V; supports multi-year battery life in always-on monitoring applications |
| Reset Delay Range | 1.25 ms to 10 s; configured via CT pin-open (20 ms), resistor-to-VDD (300 ms), or capacitor (user-defined) |
| Operating Voltage | 1.7 V to 6 V on VDD; allows use across diverse supply domains including 1.8 V, 3.3 V, and 5 V systems |
| Output Type | Open-drain RESET; supports level-shifting up to 6 V and interfaces directly with MCU reset inputs |
| Temperature Range | -40°C to +125°C junction; qualified for industrial and automotive under-hood environments |
| Hysteresis | 1–2.5% of VIT; prevents false resets during slow-rising or noisy supply transitions |
Pinout & Package
SOT-23-6 (DBV) package, 2.90 mm × 1.60 mm body size, surface-mount compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RESET | Open-drain output | Asserts low when SENSE < 2.79 V or MR = low; requires external 10 kΩ–1 MΩ pull-up to host supply |
| GND | Ground reference | Common return path for internal circuitry and external decoupling; must be low-impedance |
| MR | Manual reset input | Logic-low assertion (≤0.3×VDD) forces immediate RESET; internally pulled up to VDD via 90 kΩ |
| CT | Reset delay timing control | Configures delay: open (20 ms), resistor-to-VDD (300 ms), or capacitor-to-GND (1.25 ms–10 s) |
| SENSE | Monitoring input | Direct connection to rail under supervision; high-impedance input (≤1.25 µA leakage) minimizes loading |
| VDD | Supply input | Power source (1.7–6 V); requires local 0.1 µF ceramic decoupling capacitor per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 2.79 V threshold | Eliminates external resistor divider for 3.0 V rail monitoring-reduces BOM count and layout area |
| 0.6 µA quiescent current | Enables continuous supervision in energy-constrained applications without measurable battery drain |
| Programmable reset delay | Three configuration modes (open/resistor/capacitor) allow precise match to MCU boot timing requirements |
| Separate SENSE and VDD pins | Permits monitoring of independent voltage domains (e.g., 3.0 V analog rail while powered from 3.3 V digital supply) |
| MR input with internal pull-up | Supports processor-driven resets without external components; simplifies interface to GPIO or watchdog outputs |
Applications
| Rack Server Motherboard | Electricity Meter |
|---|---|
Use Scenario: Monitors 3.0 V auxiliary power rail supplying BMC, CPLD, or PMIC during cold start and brownout conditions. IC Role / Device Role / Timing Role: Supervisory circuit asserting open-drain RESET to hold processors in reset until stable 3.0 V is confirmed. Use Value: Prevents firmware corruption by ensuring all logic blocks initialize only after clean power-up, leveraging ±0.5% threshold accuracy and 20 ms default delay. | Use Scenario: Supervises 3.0 V rail powering metrology ADC and real-time clock in battery-backed smart meters. IC Role / Device Role / Timing Role: Undervoltage detector triggering controlled shutdown before EEPROM write corruption occurs. Use Value: Ultra-low 0.6 µA quiescent current extends battery life; -40°C to +125°C rating ensures reliability in outdoor meter enclosures. |
| DC-Input BLDC Motor Drive | Surgical Equipment |
Use Scenario: Guards 3.0 V gate driver bias supply against transient dips during high-current commutation events. IC Role / Device Role / Timing Role: Fast-response supervisor using SENSE pin to detect sub-2.79 V excursions and assert RESET within 50 µs propagation delay. Use Value: 1–2.5% hysteresis prevents oscillation during noisy switching; CT-capacitor configuration enables 1.25 ms minimum delay for rapid fault recovery. | Use Scenario: Ensures safe power sequencing for FPGA-based control logic in battery-operated surgical handpieces. IC Role / Device Role / Timing Role: Dual-role supervisor-monitors main 3.0 V rail and accepts MR signal from safety interlock circuitry. Use Value: MR input enables hardware-level emergency reset independent of software; 125°C rating supports sterilization temperature exposure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G30DBVR | Same 2.79 V threshold and SOT-23-6 package, but standard-grade (-40°C to +85°C) instead of extended-temp TPS3808E series | Lacks qualification for 125°C operation; unsuitable for under-hood or high-ambient industrial use | Select when ambient temperature remains ≤85°C and cost sensitivity outweighs thermal margin needs |
| MAX6326LT30D2T | Fixed 3.00 V threshold, 20 µA quiescent current, SC70-5 package; no MR input or CT-programmable delay | Higher power consumption limits battery lifetime; smaller 5-pin footprint but no manual reset capability | Choose for space-constrained designs where MR and adjustable delay are unnecessary and 20 µA IDD is acceptable |
Compared with TPS3808G30DBVR, the TPS3808EG30DBVR provides guaranteed operation to +125°C and tighter threshold accuracy (±0.5% vs ±1%), while MAX6326LT30D2T trades programmability and ultra-low power for smaller size and simpler integration in non-critical environments.
Availability
TPS3808EG30DBVR is available at Aetrix Electronics and suitable for rack server motherboards, electricity meters, and DC-input BLDC motor drives requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TPS3808EG30DBVR 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 delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The TPS3808E product line delivers ultra-low-power, high-accuracy supervisory circuits optimized for battery-powered and thermally demanding applications where reliable power-on reset and brownout protection are critical.
FAQ
What is the exact threshold voltage of the TPS3808EG30DBVR and how is it specified?
The TPS3808EG30DBVR has a nominal undervoltage threshold of 2.79 V, corresponding to monitoring a 3.0 V supply rail. This value is factory-trimmed with ±0.5% typical accuracy over the full -40°C to +125°C junction temperature range, as verified in the Electrical Characteristics table of the official datasheet. The threshold is fixed and does not require external resistors.
How is the reset delay time configured on the TPS3808EG30DBVR?
The reset delay time on the TPS3808EG30DBVR is set via the CT pin: leaving CT open yields a 20 ms delay, connecting CT to VDD through a 40 kΩ–200 kΩ resistor gives 300 ms, and connecting CT to GND via a ≥130 pF capacitor enables user-adjustable delays from 1.25 ms to 10 s. The delay is generated by an internal 220 nA current source charging the external capacitor.
Does the TPS3808EG30DBVR support manual reset functionality, and how is it implemented?
Yes, the TPS3808EG30DBVR includes a dedicated MR (Manual Reset) input pin. Driving MR low (≤0.3×VDD) immediately asserts the open-drain RESET output. MR features an internal 90 kΩ pull-up to VDD, allowing it to be left unconnected if unused. This enables hardware-triggered resets from microcontrollers, safety circuits, or push-button switches without external components.
What package type and dimensions does the TPS3808EG30DBVR use, and what are its assembly considerations?
The TPS3808EG30DBVR uses the SOT-23-6 (DBV) package with nominal body dimensions of 2.90 mm × 1.60 mm. It is RoHS-compliant with NiPdAu lead finish and rated for Level-1 moisture sensitivity. Layout requires a 0.1 µF ceramic capacitor near VDD, minimal parasitic capacitance on CT, and low-impedance grounding-per TI's recommended PCB guidelines in the datasheet.
Can the TPS3808EG30DBVR monitor voltage rails other than 3.0 V?
No-the TPS3808EG30DBVR is a fixed-threshold device calibrated specifically for 3.0 V rail monitoring (2.79 V trip point). To supervise other rails, select alternate members of the TPS3808E family such as TPS3808EG33DBVR (3.07 V for 3.3 V rails) or TPS3808EG18DBVR (1.67 V for 1.8 V rails). The adjustable variant TPS3808EG01DBVR supports thresholds down to 0.405 V using an external resistor divider.
TPS3808EG30DBVR 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:
- 2.79V
- 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
TPS3808EG30DBVR FAQ
1.How can I place an order for TPS3808EG30DBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3808EG30DBVR 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 TPS3808EG30DBVR reliable?
The price and inventory of TPS3808EG30DBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3808EG30DBVR is usually 5 days.
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TPS3808EG30DBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3808EG30DBVR 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 TPS3808EG30DBVR?
For technical support, including TPS3808EG30DBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3808EG30DBVR requirements.
6.How does Aetrix verify that TPS3808EG30DBVR is sourced from the original manufacturer or authorized distributors?
All TPS3808EG30DBVR 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 TPS3808EG30DBVR meets industry standards.
7.What is the process for return or replacement of TPS3808EG30DBVR?
All TPS3808EG30DBVR units undergo pre-shipment inspection (PSI). If there is an issue with TPS3808EG30DBVR, 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 TPS3808EG30DBVR part is unused and in its original packaging.
Return procedure for TPS3808EG30DBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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