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Texas Instruments TPS3808EG18DBVRQ1
- Part No.:
- TPS3808EG18DBVRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
TPS3808EG18DBVRQ1.pdf
- Description:
- AUTOMOTIVE, 600-NA ULTRA-LOW QUI
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
TPS3808EG18DBVRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-grade microprocessor supervisory circuit that monitors 1.8V system rails with ±0.5% threshold accuracy, asserts an open-drain RESET signal on undervoltage or manual reset, and supports user-programmable delay from 1.25ms to 150s - deployed in ADAS domain controllers and digital cockpit processing units.
For engineers reviewing the TPS3808EG18DBVRQ1 datasheet, TPS3808EG18DBVRQ1 pinout, TPS3808EG18DBVRQ1 application, or TPS3808EG18DBVRQ1 equivalent, key selection considerations include its 0.6μA quiescent current, SOT-23-6 package (2.9mm × 1.6mm), 1.7V–6V supply range, -40°C to +125°C operation, and configurable CT-based timing for robust power-on sequencing in safety-critical automotive electronics.
Technical Context
The TPS3808EG18DBVRQ1 implements a precision voltage reference comparator with 0.5% VIT accuracy and built-in hysteresis (1–2.5%) to prevent oscillatory RESET assertion during rail recovery. Its internal 220nA CT charging current source enables precise capacitor-based delay programming, while separate SENSE and VDD pins decouple monitoring path from supply path.
It operates in three functional modes: normal supervision (SENSE < VIT or MR low → RESET asserted), power-on reset hold (VDD between VPOR = 1V and VDD(min) = 1.7V → RESET forced low), and undefined state below VPOR. The MR pin features a 90kΩ internal pull-up, enabling direct GPIO connection without external biasing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.7V to 6V - supports wide automotive battery and post-regulator rails without external LDO |
| Threshold Voltage (VIT) | 1.67V ±0.5% - factory-trimmed for 1.8V nominal rail; enables accurate brownout detection without resistor divider |
| Quiescent Current (IDD) | 0.6μA typical at 3.3V - extends battery life in always-on vehicle modules like telematics and driver monitoring |
| Reset Delay Range | 1.25ms to 150s - programmable via CT pin capacitor (≥130pF) or fixed options (20ms/300ms) |
| Operating Temperature | -40°C to +125°C (TJ) - qualified per AEC-Q100 Grade 1 for under-hood and infotainment applications |
| RESET Output Type | Open-drain with 400mV max VOL at 1mA - allows level-shifting up to 6V using external pull-up, compatible with diverse MCU reset inputs |
| SENSE Input Bias Current | ±25nA at VIT - minimizes error in high-impedance monitoring networks; supports direct connection to low-power rails |
Pinout & Package
TPS3808EG18DBVRQ1 is housed in a compact 6-pin SOT-23 (DBV) package measuring 2.90mm × 1.60mm, optimized for space-constrained automotive PCBs and supporting reflow soldering per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RESET | Open-drain output | Asserts low when SENSE < VIT or MR = low; requires external 10kΩ–1MΩ pull-up to host supply (up to 6V) |
| GND | Ground reference | Primary return path for internal circuitry and SENSE comparator; must be low-impedance connection to system ground plane |
| MR | Manual reset input | Logic-low active input (VMR_L ≤ 0.3VDD); internally pulled up to VDD via 90kΩ resistor - can be left floating if unused |
| CT | Reset delay timing control | Connects to external capacitor (≥130pF) for programmable delay; open = 20ms, tied to VDD via 40–200kΩ = 300ms |
| SENSE | Voltage monitoring input | High-impedance input (±25nA bias) for direct connection to monitored rail; immune to transients ≥5µs at 5% overdrive |
| VDD | Power supply input | Supplies internal circuitry; requires 0.1µF ceramic bypass capacitor placed adjacent to pin per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for -40°C to +125°C junction operation in automotive environments, including thermal cycling and vibration stress |
| 0.5% threshold accuracy | Reduces design margin requirements versus typical 1–2% supervisors, enabling tighter power-rail tolerance budgets in 1.8V core domains |
| 0.6μA quiescent current | Enables >10-year battery backup in always-on modules (e.g., gateway wake-up circuits) without compromising supervision reliability |
| Separate SENSE/VDD pins | Allows monitoring of isolated or lower-voltage rails (e.g., 1.8V core) while powered from higher-voltage domain (e.g., 3.3V I/O), eliminating cross-rail coupling errors |
| Glitch-immune MR and SENSE inputs | Withstands 50ns MR glitches and 5µs SENSE transients at 5% overdrive, preventing spurious resets in noisy automotive ECU environments |
Applications
| ADAS Domain Controller | Automotive Gateway |
|---|---|
Use Scenario: Monitors 1.8V SoC core voltage during cold cranking and load dump events in centralized ADAS compute units. IC Role / Device Role / Timing Role: Supervisory circuit asserting RESET to prevent processor lockup when core rail dips below 1.67V; delay set to 100ms to avoid false triggers during transient sags. Use Value: Ensures deterministic boot recovery after voltage interruptions, meeting ISO 26262 ASIL-B functional safety requirements for sensor fusion processors. | Use Scenario: Provides power-on reset coordination across multiple voltage domains (1.8V CAN FD controller, 3.3V Ethernet PHY, 5V USB) in vehicle communication gateways. IC Role / Device Role / Timing Role: Single-channel supervisor with independent SENSE input per rail; MR pin daisy-chained to synchronize reset sequencing across subsystems. Use Value: Eliminates need for discrete RC networks per rail, reducing BOM count and PCB area while maintaining <1% threshold drift over temperature. |
| Digital Cockpit Processing Unit | Telematics Control Unit |
Use Scenario: Supervises 1.8V GPU memory interface voltage in infotainment head units subject to rapid thermal cycling and RF interference. IC Role / Device Role / Timing Role: High-accuracy voltage monitor with 1.67V threshold and 20ms fixed delay; SENSE pin decoupled from VDD to reject supply noise coupling. Use Value: Prevents graphical corruption and UI freezes by ensuring GPU only initializes after stable core voltage is confirmed, improving perceived system responsiveness. | Use Scenario: Enables ultra-low-power wake-on-LTE functionality in cellular-connected telematics modules with 10-year battery life targets. IC Role / Device Role / Timing Role: Low-IDD supervisor (0.6μA) monitoring 1.8V modem core rail; CT pin left open for 20ms delay to match LTE baseband initialization timing. Use Value: Reduces average system current by >50% versus legacy 5μA supervisors, directly extending battery runtime in GPS-tracked fleet management devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G18QDBVRQ1 | Same 1.67V threshold and SOT-23-6 package, but uses older trimming process yielding ±1% VIT accuracy vs. ±0.5% for TPS3808EG18DBVRQ1 | Acceptable for non-safety-critical 1.8V monitoring where 1% margin suffices; not qualified for ASIL-B systems requiring tighter threshold stability | Select when cost sensitivity outweighs need for highest accuracy; verify thermal drift meets design margin at 125°C |
| MAX6326LT18D2T | Fixed 1.8V threshold, 1.6μA IDD, 200ms fixed delay, SC70-6 package (2.0mm × 1.25mm) | Smaller footprint but higher quiescent current limits battery lifetime; lacks MR input and CT programmability, restricting use to simple power-on reset | Choose only for space-constrained designs where 200ms fixed delay and no manual reset are acceptable trade-offs |
Compared with TPS3808G18QDBVRQ1, the TPS3808EG18DBVRQ1 delivers twice the threshold accuracy critical for ASIL-B compliance, while versus MAX6326LT18D2T it provides 2.7× lower IDD, full MR control, and 750× wider delay range - making it the sole option for advanced automotive reset sequencing.
Availability
TPS3808EG18DBVRQ1 is available at Aetrix Electronics and suitable for ADAS domain controllers, automotive gateways, and digital cockpit processing units requiring stable component supply across extended automotive lifecycles.
Supply support for TPS3808EG18DBVRQ1 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 over 50 years of automotive IC expertise and AEC-Q100-compliant manufacturing.
The TPS3808E-Q1 product line was designed specifically for automotive power-rail supervision in safety-critical ECUs, emphasizing ultra-low quiescent current, high threshold accuracy, and programmable timing to meet ISO 26262 and OEM-specific reset sequencing requirements.
FAQ
What is the exact threshold voltage and accuracy of the TPS3808EG18DBVRQ1?
The TPS3808EG18DBVRQ1 has a nominal threshold voltage of 1.67V with ±0.5% accuracy over -40°C to +125°C. This is factory-trimmed for 1.8V nominal rails and specified in the Electrical Characteristics table (Section 6.5) of the SBVS430C datasheet. The 0.5% tolerance eliminates need for external calibration in most automotive applications.
How is the reset delay time configured on the TPS3808EG18DBVRQ1?
The TPS3808EG18DBVRQ1 supports three delay configurations: leaving CT open yields 20ms, connecting CT to VDD via 40–200kΩ resistor gives 300ms, and connecting CT to GND via ≥130pF capacitor enables user-programmable delays from 1.25ms to 150s. The delay is set by an internal 220nA current source charging the external capacitor.
Does the TPS3808EG18DBVRQ1 require external components for basic operation?
Yes - the TPS3808EG18DBVRQ1 requires a 0.1µF ceramic capacitor on VDD, a 10kΩ–1MΩ pull-up resistor on RESET, and optionally a capacitor on CT for programmable delay. The MR pin may be left floating due to its internal 90kΩ pull-up. No external resistors are needed for threshold setting since VIT is factory-fixed at 1.67V.
Can the TPS3808EG18DBVRQ1 monitor voltages other than 1.8V?
No - the TPS3808EG18DBVRQ1 is a fixed-threshold device calibrated specifically for 1.8V rails (VIT = 1.67V). To monitor other rails, select variants like TPS3808EG33DBVRQ1 (3.3V) or TPS3808EG01DBVRQ1 (adjustable down to 0.405V). Mixing variants risks incorrect reset assertion timing.
What automotive qualification does the TPS3808EG18DBVRQ1 meet?
The TPS3808EG18DBVRQ1 is AEC-Q100 qualified for Grade 1 operation (-40°C to +125°C), with test results documented in the device's qualification report. It supports automotive applications including ADAS, digital cockpits, and telematics, and is manufactured in TI's certified automotive facilities with full traceability.
TPS3808EG18DBVRQ1 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:
- 1.67V
- 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
TPS3808EG18DBVRQ1 FAQ
1.How can I place an order for TPS3808EG18DBVRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3808EG18DBVRQ1 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 TPS3808EG18DBVRQ1 reliable?
The price and inventory of TPS3808EG18DBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3808EG18DBVRQ1 is usually 5 days.
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4.How is shipping managed for TPS3808EG18DBVRQ1?
TPS3808EG18DBVRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3808EG18DBVRQ1 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 TPS3808EG18DBVRQ1?
For technical support, including TPS3808EG18DBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3808EG18DBVRQ1 requirements.
6.How does Aetrix verify that TPS3808EG18DBVRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS3808EG18DBVRQ1 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 TPS3808EG18DBVRQ1 meets industry standards.
7.What is the process for return or replacement of TPS3808EG18DBVRQ1?
All TPS3808EG18DBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS3808EG18DBVRQ1, 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 TPS3808EG18DBVRQ1 part is unused and in its original packaging.
Return procedure for TPS3808EG18DBVRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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