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Texas Instruments TPS3808EG12DBVRQ1
- Part No.:
- TPS3808EG12DBVRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
TPS3808EG12DBVRQ1.pdf
- Description:
- AUTOMOTIVE, 600NA ULTRA-LOW QUIE
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
TPS3808EG12DBVRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-grade microprocessor supervisory circuit that monitors 1.2V system rails with ±0.5% threshold accuracy (1.12V 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 TPS3808EG12DBVRQ1 datasheet, TPS3808EG12DBVRQ1 pinout, TPS3808EG12DBVRQ1 application, or TPS3808EG12DBVRQ1 equivalent, key selection criteria include its 1.12V fixed undervoltage threshold, SOT-23-6 footprint compatibility, CT-capacitor-based delay configurability, MR input for system-initiated reset, and AEC-Q100 qualification for safety-critical automotive power monitoring.
Technical Context
The TPS3808EG12DBVRQ1 uses an internal precision reference and comparator with built-in hysteresis (1–2.5%) to detect SENSE voltage drops below 1.12V. Its reset assertion logic responds to either SENSE falling below VIT or MR being driven low (≤0.3×VDD), with propagation delays as low as 30µs for SENSE and 500ns for MR.
Reset deassertion requires both SENSE > VIT + VHYS and MR > 0.7×VDD, followed by a programmable delay timed by an internal 220nA current source charging an external CT capacitor. The device features a 90kΩ internal MR pull-up and requires an external 10kΩ–1MΩ pull-up on the open-drain RESET output.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.7V to 6V - supports wide-input battery and post-regulator monitoring without external LDO |
| Threshold Voltage (VIT) | 1.12V ±0.5% - enables precise 1.2V rail supervision with minimal margin loss |
| Quiescent Current (IDD) | 0.6μA typical at 3.3V - extends battery life in always-on automotive modules |
| Reset Delay Range | 1.25ms to 150s - configurable via CT capacitor (≥130pF) for diverse processor boot timing needs |
| Operating Temperature | –40°C to +125°C (TJ) - meets AEC-Q100 Grade 1 requirements for under-hood and cockpit electronics |
| Output Type | Open-drain RESET - allows level-shifting up to 6V and wired-OR with other reset sources |
| MR Input Logic Threshold | VMR_L ≤ 0.3×VDD, VMR_H ≥ 0.7×VDD - ensures noise-immune manual reset triggering across supply range |
Pinout & Package
TPS3808EG12DBVRQ1 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 |
|---|---|---|
| 1: RESET | Open-drain output | Asserts low during undervoltage or MR event; requires external pull-up (10kΩ–1MΩ) 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 | Active-low trigger with 90kΩ internal pull-up to VDD; drives RESET low when ≤0.3×VDD |
| 4: CT | Reset delay programming | Connects to external capacitor (≥130pF) to set delay; open = 20ms, tied to VDD via resistor = 300ms |
| 5: SENSE | Monitoring input | High-impedance input (±25nA leakage) for direct connection to 1.2V rail; includes hysteresis for glitch immunity |
| 6: VDD | Power supply input | Accepts 1.7–6V; requires 0.1μF ceramic decoupling capacitor placed adjacent to pin |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive use from –40°C to +125°C junction temperature with full reliability testing |
| Fixed 1.12V threshold accuracy | ±0.5% over temperature eliminates need for external resistor divider calibration in 1.2V rail monitoring |
| Ultra-low 0.6μA quiescent current | Enables integration into always-on domains (e.g., gateway wake-up circuits) without compromising battery drain budgets |
| Programmable reset delay (1.25ms–150s) | Supports diverse MCU boot sequences-from fast-boot ADAS SoCs to slow-starting telematics processors-via single capacitor |
| Separate SENSE and VDD pins | Allows independent monitoring of a 1.2V domain while powered from a different rail (e.g., 3.3V or 5V) |
Applications
| ADAS Domain Controller | Automotive Gateway |
|---|---|
Use Scenario: Monitors 1.2V core voltage of high-performance ADAS SoC during cold cranking and load dump events. IC Role / Device Role / Timing Role: Supervisory circuit asserting RESET if 1.2V rail dips below 1.12V, holding reset for 20ms minimum to ensure clean SoC initialization. Use Value: Prevents corrupted firmware execution during unstable power conditions using ±0.5% threshold accuracy and 30µs detection latency. | Use Scenario: Ensures reliable boot sequencing across multiple voltage domains (1.2V, 3.3V, 5V) in multi-ECU communication hubs. IC Role / Device Role / Timing Role: Dedicated 1.2V supervisor with MR input tied to watchdog timer output, enabling coordinated system-wide reset. Use Value: Enables fail-safe recovery from software hangs via MR-triggered reset without requiring changes to 1.2V rail design. |
| Digital Cockpit Processing Unit | Telematics Control Unit |
Use Scenario: Guards 1.2V GPU/CPU core supply in infotainment systems subject to rapid transients during display backlight switching. IC Role / Device Role / Timing Role: High-immunity supervisor with 1.5% hysteresis and CT capacitor tuned to 100ms delay for graceful UI restart. Use Value: Eliminates false resets from short-duration noise spikes while ensuring deterministic recovery after sustained undervoltage. | Use Scenario: Provides robust power-on reset for LTE modem subsystems operating from vehicle battery with wide voltage variation (9–16V). IC Role / Device Role / Timing Role: Monitors post-regulated 1.2V rail with 150s max delay capability to accommodate slow-starting RF power amplifiers. Use Value: Guarantees modem initialization completes before cellular registration begins, avoiding network attachment failures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G12QDBVRQ1 | Same 1.12V threshold and SOT-23-6 package, but lacks AEC-Q100 qualification and specified only to –40°C to +105°C | Not suitable for under-hood or safety-critical domains requiring Grade 1 temperature range | Select TPS3808EG12DBVRQ1 when AEC-Q100 Grade 1 compliance is mandatory for production automotive systems. |
| MAX6373HESA+ | Fixed 1.232V threshold, 20μA quiescent current, SO-8 package, no MR input, 200ms fixed delay | Larger footprint, higher current draw, and inflexible timing limit its use in compact, low-power, or MR-requiring designs | Choose TPS3808EG12DBVRQ1 for space-constrained, ultra-low-power, or MR-configurable automotive applications. |
Compared with TPS3808G12QDBVRQ1 and MAX6373HESA+, the TPS3808EG12DBVRQ1 uniquely combines AEC-Q100 Grade 1 qualification, 0.6μA quiescent current, MR input, and capacitor-programmable delay in a 2.9mm × 1.6mm SOT-23 package-making it the only option meeting full automotive functional safety readiness for 1.2V rail supervision.
Availability
TPS3808EG12DBVRQ1 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 TPS3808EG12DBVRQ1 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 automotive, industrial, and power management ICs.
The TPS3808E-Q1 product line delivers AEC-Q100 qualified supervisory circuits designed specifically for automotive power-rail monitoring, emphasizing ultra-low quiescent current, precise threshold accuracy, and flexible reset timing in miniature packages.
FAQ
What is the exact undervoltage threshold voltage of the TPS3808EG12DBVRQ1?
The TPS3808EG12DBVRQ1 has a nominal undervoltage threshold of 1.12V with ±0.5% accuracy over temperature (–40°C to +125°C). This corresponds to monitoring a 1.2V nominal supply rail and is factory-trimmed-no external components are needed to achieve this precision. The threshold is specified as VIT-(UV) in the electrical characteristics table and applies directly to the SENSE pin voltage.
Does the TPS3808EG12DBVRQ1 support manual reset functionality, and how is it implemented?
Yes, the TPS3808EG12DBVRQ1 supports manual reset via the MR pin (Pin 3). Driving MR low (≤0.3×VDD) immediately asserts the open-drain RESET output. An internal 90kΩ pull-up resistor ties MR to VDD, so the pin can be left unconnected if manual reset is unused. This feature enables external logic or microcontrollers to initiate a system reset independently of the monitored 1.2V rail condition.
How is the reset delay time configured on the TPS3808EG12DBVRQ1?
The reset delay time on the TPS3808EG12DBVRQ1 is configured using the CT pin (Pin 4). Leaving CT open yields a fixed 20ms delay; connecting CT to VDD via a 40kΩ–200kΩ resistor gives ~300ms; and connecting CT to GND via a capacitor (≥130pF) enables user-programmable delays from 1.25ms to 150s. The delay is generated by an internal 220nA current source charging the external capacitor.
What package type and dimensions does the TPS3808EG12DBVRQ1 use?
The TPS3808EG12DBVRQ1 uses a 6-pin SOT-23 (DBV) package with nominal body dimensions of 2.90mm × 1.60mm. It is RoHS-compliant and designed for surface-mount assembly. Pin spacing is 0.95mm, and the package height is 1.15mm maximum-enabling high-density placement in automotive control units where board space is constrained.
Is the TPS3808EG12DBVRQ1 compatible with 3.3V or 5V supply rails for its own operation?
Yes, the TPS3808EG12DBVRQ1 operates from a VDD supply of 1.7V to 6V, making it fully compatible with 3.3V and 5V system rails. Its 0.6μA typical quiescent current remains stable across this range, and all specifications-including threshold accuracy and delay timing-are guaranteed from –40°C to +125°C. This allows it to monitor a 1.2V rail while being powered from a higher-voltage domain such as 3.3V or 5V.
TPS3808EG12DBVRQ1 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:
- 1.12V
- 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
TPS3808EG12DBVRQ1 FAQ
1.How can I place an order for TPS3808EG12DBVRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3808EG12DBVRQ1 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 TPS3808EG12DBVRQ1 reliable?
The price and inventory of TPS3808EG12DBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3808EG12DBVRQ1 is usually 5 days.
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TPS3808EG12DBVRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3808EG12DBVRQ1 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 TPS3808EG12DBVRQ1?
For technical support, including TPS3808EG12DBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3808EG12DBVRQ1 requirements.
6.How does Aetrix verify that TPS3808EG12DBVRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS3808EG12DBVRQ1 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 TPS3808EG12DBVRQ1 meets industry standards.
7.What is the process for return or replacement of TPS3808EG12DBVRQ1?
All TPS3808EG12DBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS3808EG12DBVRQ1, 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 TPS3808EG12DBVRQ1 part is unused and in its original packaging.
Return procedure for TPS3808EG12DBVRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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