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Texas Instruments TPS3808EG25DBVRQ1
- Part No.:
- TPS3808EG25DBVRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
TPS3808EG25DBVRQ1.pdf
- Description:
- AUTOMOTIVE, 600NA ULTRA-LOW QUIE
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
TPS3808EG25DBVRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-grade microprocessor supervisory circuit that monitors 2.5V system rails with ±0.5% threshold accuracy (2.33V nominal), asserts an open-drain RESET signal on undervoltage or manual reset, and supports user-programmable delay from 1.25ms to 150s via external capacitor. It operates from –40°C to +125°C in a 6-pin SOT-23 package and draws only 0.6μA typical quiescent current.
For engineers reviewing the TPS3808EG25DBVRQ1 datasheet, TPS3808EG25DBVRQ1 pinout, TPS3808EG25DBVRQ1 application, or TPS3808EG25DBVRQ1 equivalent, key selection criteria include its fixed 2.5V monitoring threshold, SENSE/VDD separation for accurate rail sensing, CT-pin programmable reset delay, MR input for system-initiated reset, and AEC-Q100 qualification for safety-critical automotive domains.
Technical Context
The TPS3808EG25DBVRQ1 implements a precision bandgap reference and comparator architecture with built-in hysteresis (1–2.5%) to ensure clean RESET assertion/deassertion during voltage transients. Its SENSE pin operates independently from VDD, enabling accurate monitoring of remote power rails without supply coupling errors.
Reset timing is controlled by an internal 220nA current source charging an external capacitor on the CT pin - enabling precise, temperature-stable delay programming across 5 decades (1.25ms–150s). The MR input features a 90kΩ internal pull-up, allowing direct GPIO connection without external biasing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.7V to 6V - supports wide-input automotive systems including post-regulated 2.5V, 3.3V, and 5V rails |
| Threshold Voltage | 2.33V ±0.5% - factory-trimmed fixed threshold for 2.5V nominal rail monitoring |
| Quiescent Current | 0.6μA typical at 3.3V - enables always-on battery monitoring in low-power automotive modules |
| Reset Delay Range | 1.25ms to 150s - programmable via external CT capacitor (≥130pF), with fixed options at 20ms (CT open) or 300ms (CT→VDD) |
| Operating Temperature | –40°C to +125°C junction - fully specified for automotive Grade 1 applications per AEC-Q100 |
| Output Type | Open-drain RESET - allows level-shifting up to 6V with external pull-up, compatible with diverse MCU reset inputs |
| Hysteresis | 1–2.5% of VIT - prevents chatter during slow-rising/falling supply transitions |
Pinout & Package
TPS3808EG25DBVRQ1 is housed in a 6-pin SOT-23 (DBV) package measuring 2.90mm × 1.60mm, optimized for space-constrained automotive PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RESET | Open-drain output | Asserts low when SENSE < 2.33V or MR = low; requires external 10kΩ–1MΩ pull-up; supports voltage levels up to 6V |
| GND | Ground reference | Primary analog and digital ground return; must be low-impedance and adjacent to decoupling capacitor |
| MR | Manual reset input | Active-low logic input with 90kΩ internal pull-up to VDD; drives RESET low when pulled ≤0.3×VDD |
| CT | Reset delay timing control | Connects to external capacitor (≥130pF) to set delay; open = 20ms, tied to VDD via 40–200kΩ = 300ms |
| SENSE | Voltage monitoring input | High-impedance input (≤25nA leakage) for direct connection to 2.5V rail; separate from VDD to avoid supply noise coupling |
| VDD | Power supply input | 1.7–6V supply pin; requires 0.1μF ceramic decoupling capacitor placed adjacent to pin |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C operation with full reliability testing - required for ADAS, gateway, and cockpit ECUs |
| ±0.5% threshold accuracy | Ensures reliable 2.5V rail detection across temperature and lifetime - eliminates need for recalibration or margining |
| 0.6μA quiescent current | Enables continuous supervision in always-on vehicle networks (e.g., CAN FD wake-up circuits) without draining 12V battery |
| SENSE/VDD separation | Prevents false resets caused by VDD ripple or dropout during load transients - critical for multi-rail SoC power sequencing |
| Glitch immunity | 5µs immunity on SENSE (5% overdrive), 50ns on MR - rejects EMI-induced spikes common in automotive environments |
Applications
| ADAS Domain Controller | Automotive Gateway |
|---|---|
Use Scenario: Monitors 2.5V core supply of radar or vision SoC during cold cranking and load dump events. IC Role / Device Role / Timing Role: Supervises power integrity and asserts RESET if rail drops below 2.33V; delay set to 100ms to avoid nuisance resets during transient dips. Use Value: Prevents corrupted sensor fusion processing by ensuring SoC only boots when stable 2.5V is confirmed. | Use Scenario: Validates 2.5V I/O rail powering CAN/LIN transceivers and Ethernet PHYs before network initialization. IC Role / Device Role / Timing Role: Acts as power-good enabler for communication stack startup; MR pin synchronized with MCU boot sequence. Use Value: Guarantees deterministic network bring-up by delaying gateway firmware execution until all interface voltages are valid. |
| Digital Cockpit Processing Unit | Telematics Control Unit |
Use Scenario: Watches 2.5V GPU or display controller supply during ignition cycle and thermal throttling events. IC Role / Device Role / Timing Role: Provides fail-safe reset with 50ms delay to accommodate slow-rising display power rails while rejecting sub-10µs noise. Use Value: Eliminates graphical artifacts and UI freezes by enforcing strict power-rail sequencing before GPU clock enable. | Use Scenario: Supervises 2.5V modem and GNSS receiver supply in cellular-connected telematics modules. IC Role / Device Role / Timing Role: Uses MR input to coordinate reset with OTA update state machine; CT capacitor set for 2s delay to allow modem warm-up. Use Value: Ensures modem firmware integrity by preventing premature execution before RF subsystem stabilization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G25DBVRQ1 | Same pinout and electrical specs; differs only in production lot traceability and enhanced ESD rating (HBM ±3000V vs ±2000V) | Preferred for new designs requiring higher ESD robustness in high-humidity assembly environments | Select TPS3808G25DBVRQ1 when ESD margin beyond AEC-Q100 minimum is mandated by OEM process validation |
| MAX6375XR25+T | Fixed 2.5V threshold, but uses internal RC timing (no CT pin); 1.5μA quiescent current; SOT23-5 package (no MR pin) | Lacks manual reset and programmable delay - suitable only for simple power-on reset, not complex sequencing | Choose MAX6375XR25+T only for cost-sensitive, non-sequencing applications where MR and adjustable delay are unnecessary |
Compared with TPS3808EG25DBVRQ1, TPS3808G25DBVRQ1 offers identical functionality with improved ESD tolerance, while MAX6375XR25+T sacrifices MR capability and delay flexibility for lower BOM count and cost - making it viable only in static, single-event reset scenarios.
Availability
TPS3808EG25DBVRQ1 is available at Aetrix Electronics and suitable for ADAS domain controllers, automotive gateways, and digital cockpit processing units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TPS3808EG25DBVRQ1 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 and embedded processing solutions, with deep expertise in automotive electronics, power management, and precision analog design.
The TPS3808E-Q1 product line was developed specifically for AEC-Q100-compliant power supervision in safety-critical automotive ECUs - emphasizing ultra-low quiescent current, high threshold accuracy, and robust glitch immunity in harsh electrical environments.
FAQ
What is the exact threshold voltage and accuracy of the TPS3808EG25DBVRQ1?
The TPS3808EG25DBVRQ1 has a nominal threshold voltage of 2.33V for a 2.5V rail, with ±0.5% accuracy over –40°C to +125°C. This specification is factory-trimmed and guaranteed in production test - no external calibration is needed. The TPS3808EG25DBVRQ1 achieves this using a precision bandgap reference and laser-trimmed resistor network, ensuring consistent performance across automotive temperature extremes and lifetime.
Can the TPS3808EG25DBVRQ1 monitor a voltage other than 2.5V?
No - the TPS3808EG25DBVRQ1 is a fixed-threshold variant configured exclusively for 2.5V rail monitoring (2.33V trip point). To supervise other rails, select a different part number from the family, such as TPS3808EG33DBVRQ1 for 3.3V or TPS3808EG12DBVRQ1 for 1.2V. The TPS3808EG25DBVRQ1 does not support external resistor dividers or adjustable thresholds; its internal reference is hard-coded for 2.33V.
How is the reset delay time programmed on the TPS3808EG25DBVRQ1?
The reset delay on the TPS3808EG25DBVRQ1 is set via the CT pin: leaving CT open yields 20ms, connecting CT to VDD through a 40–200kΩ resistor gives 300ms, and connecting CT to GND via a ≥130pF capacitor enables user-programmable delays from 1.25ms to 150s. The TPS3808EG25DBVRQ1 uses an internal 220nA current source to charge the capacitor - delay time is linearly proportional to capacitance value and unaffected by VDD variation.
Does the TPS3808EG25DBVRQ1 require an external pull-up resistor on the RESET pin?
Yes - the TPS3808EG25DBVRQ1 features an open-drain RESET output and requires an external pull-up resistor between RESET and the target MCU's reset rail (typically 10kΩ to 1MΩ). This allows level-shifting - e.g., pulling RESET to 3.3V or 5V even when VDD is 2.5V. Without the pull-up, the RESET signal remains undefined. The TPS3808EG25DBVRQ1 itself does not provide internal pull-up on RESET.
Is the MR (Manual Reset) pin of the TPS3808EG25DBVRQ1 internally pulled up?
Yes - the MR pin of the TPS3808EG25DBVRQ1 includes a factory-trimmed 90kΩ internal pull-up resistor to VDD, allowing direct connection to a GPIO without external biasing. Driving MR to ≤0.3×VDD asserts RESET; releasing MR lets the internal resistor pull it high, initiating the reset timeout period once SENSE exceeds 2.33V. This feature simplifies integration into MCU-based systems and eliminates discrete components in most implementations.
TPS3808EG25DBVRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- -
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.33V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 180ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
TPS3808EG25DBVRQ1 FAQ
1.How can I place an order for TPS3808EG25DBVRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3808EG25DBVRQ1 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 TPS3808EG25DBVRQ1 reliable?
The price and inventory of TPS3808EG25DBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3808EG25DBVRQ1 is usually 5 days.
3.What payment methods are accepted for TPS3808EG25DBVRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3808EG25DBVRQ1 transactions.
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TPS3808EG25DBVRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3808EG25DBVRQ1 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 TPS3808EG25DBVRQ1?
For technical support, including TPS3808EG25DBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3808EG25DBVRQ1 requirements.
6.How does Aetrix verify that TPS3808EG25DBVRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS3808EG25DBVRQ1 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 TPS3808EG25DBVRQ1 meets industry standards.
7.What is the process for return or replacement of TPS3808EG25DBVRQ1?
All TPS3808EG25DBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS3808EG25DBVRQ1, 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 TPS3808EG25DBVRQ1 part is unused and in its original packaging.
Return procedure for TPS3808EG25DBVRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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