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Texas Instruments TPS3808EG19DBVRQ1
- Part No.:
- TPS3808EG19DBVRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
TPS3808EG19DBVRQ1.pdf
- Description:
- AUTOMOTIVE, 600NA ULTRA-LOW QUIE
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
TPS3808EG19DBVRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-grade microprocessor supervisory circuit that monitors 1.9V 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. It operates from –40°C to +125°C and draws only 0.6μA typical quiescent current in a 6-pin SOT-23 package.
For engineers reviewing the TPS3808EG19DBVRQ1 datasheet, TPS3808EG19DBVRQ1 pinout, TPS3808EG19DBVRQ1 application, or TPS3808EG19DBVRQ1 equivalent, this page delivers verified technical context, exact pin functions, real-world automotive use cases, and validated alternative options for ADAS, digital cockpit, and telematics power-rail monitoring.
Technical Context
The TPS3808EG19DBVRQ1 uses an internal precision reference to achieve ±0.5% fixed-threshold accuracy at 1.77V (1.9V nominal rail), with built-in hysteresis (1–2.5%) ensuring clean RESET assertion/deassertion. Its SENSE pin monitors external voltage independently of VDD, enabling reliable supervision of core or I/O rails even during brownout conditions.
Reset delay is controlled via the CT pin: open-circuit yields 20ms, resistor-to-VDD gives 300ms, and a ground-referenced capacitor (≥130pF) enables full programmability from 1.25ms to 150s using a 220nA internal current source. The MR input features a 90kΩ internal pull-up and responds within 500ns to initiate reset on demand.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Threshold Voltage | 1.77V ±0.5% - precisely matches 1.9V supply rail with minimal tolerance drift over temperature. |
| Quiescent Current | 0.6μA typical - enables always-on battery monitoring without compromising vehicle battery life. |
| Reset Delay Range | 1.25ms to 150s - fully configurable via external capacitor on CT pin for diverse MCU boot timing requirements. |
| Operating Temperature | –40°C to +125°C - qualified per AEC-Q100 Grade 1 for under-hood and infotainment module deployment. |
| Output Type | Open-drain RESET - supports level-shifting up to 6V and flexible pull-up to host processor voltage domain. |
| SENSE Input Bias | ±25nA max - minimizes loading error on low-current voltage rails like MCU core supplies. |
| Hysteresis | 1–2.5% of VIT - prevents chatter during slow-rising/falling supply transitions near threshold. |
Pinout & Package
TPS3808EG19DBVRQ1 is housed in a compact 6-pin SOT-23 package (2.9mm × 1.6mm), optimized for space-constrained automotive PCBs and compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RESET | Open-drain output | Asserts low during undervoltage or MR event; requires external 10kΩ–1MΩ pull-up; supports voltage domains up to 6V. |
| GND | Ground reference | Primary return path for internal circuitry and RESET sink current; must be low-impedance connection to system ground plane. |
| MR | Manual reset input | Logic-low (≤0.3×VDD) triggers immediate RESET assertion; internally pulled up to VDD via 90kΩ resistor. |
| CT | Delay timing control | Connects to external capacitor (≥130pF) to set precise reset timeout; open = 20ms, resistor-to-VDD = 300ms. |
| SENSE | Voltage monitoring input | Directly connects to monitored rail (e.g., 1.9V core); high-impedance input (±25nA) avoids loading sensitive supplies. |
| VDD | Supply input | Power source (1.7–6V); requires local 0.1μF ceramic decoupling capacitor for stable reference operation. |
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 1.77V threshold accuracy | ±0.5% over temperature eliminates need for external calibration or trimming in production systems. |
| Ultra-low 0.6μA quiescent current | Enables permanent connection to vehicle battery without measurable drain during sleep modes. |
| Independent SENSE and VDD pins | Allows monitoring of voltage rails different from device supply (e.g., monitor 1.9V core while powered from 3.3V I/O rail). |
| Programmable reset delay | Supports both fixed delays (20ms/300ms) and wide-range capacitor-based tuning (1.25ms–150s) for flexible system boot sequencing. |
Applications
| ADAS Domain Controller | Automotive Gateway |
|---|---|
Use Scenario: Monitors 1.9V CPU core rail during cold cranking and engine start-stop cycles where voltage sags below specification. IC Role / Device Role / Timing Role: Supervises power integrity and asserts RESET until rail stabilizes above 1.77V with 20ms delay to ensure full CPU initialization. Use Value: Prevents erratic execution or memory corruption by guaranteeing clean reset before firmware execution begins. | Use Scenario: Ensures reliable boot of multi-protocol gateway MCU after ignition-on, especially when multiple CAN/FlexRay supplies ramp asynchronously. IC Role / Device Role / Timing Role: Uses MR pin to synchronize RESET across subsystems; CT capacitor sets 100ms delay matching transceiver lock time. Use Value: Eliminates race conditions between communication peripherals and application processor during power-up sequencing. |
| Digital Cockpit Processing Unit | Telematics Control Unit |
Use Scenario: Guards 1.9V GPU or display controller supply against transient dips caused by backlight switching or touch interrupt bursts. IC Role / Device Role / Timing Role: Leverages high noise immunity (5µs glitch rejection on SENSE) to avoid false resets during EMI-heavy infotainment operation. Use Value: Maintains UI continuity and prevents unexpected reboots during driver interaction without sacrificing responsiveness. | Use Scenario: Provides fail-safe reset for LTE/V2X modem subsystem during battery voltage fluctuations in parked connectivity mode. IC Role / Device Role / Timing Role: Operates from backup battery (2.5–3.6V) while monitoring primary 1.9V RF supply; CT configured for 5s delay to allow modem recovery before hard reset. Use Value: Extends functional uptime in low-power tracking applications while ensuring deterministic recovery from deep undervoltage events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G19QDBVRQ1 | Same pinout and electrical specs; differs only in marking (G vs EG prefix indicates minor revision or test bin) | No functional difference; identical AEC-Q100 qualification and performance across temperature | Select when sourcing newer manufacturing lots or requiring TI's latest wafer fab revision. |
| MAX6373HETA+T | Fixed 1.85V threshold (±1.5%), 2.5μA quiescent current, 200ms fixed delay, no CT programmability | Lacks adjustable delay and ultra-low IQ; suited for simpler cost-sensitive modules without complex boot timing | Choose only if design requires no delay tuning and can tolerate higher supply current and looser threshold accuracy. |
Compared with TPS3808EG19DBVRQ1, TPS3808G19QDBVRQ1 offers identical functionality with updated process/test, while MAX6373HETA+T trades programmability and efficiency for lower unit cost in non-critical applications.
Availability
TPS3808EG19DBVRQ1 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 TPS3808EG19DBVRQ1 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 and functional safety design.
The TPS3808E-Q1 product line was engineered specifically for automotive power-rail supervision-emphasizing ultra-low quiescent current, AEC-Q100 compliance, and robust reset timing control for safety-critical ECUs.
FAQ
What is the exact threshold voltage and accuracy of the TPS3808EG19DBVRQ1?
The TPS3808EG19DBVRQ1 has a nominal threshold voltage of 1.77V, corresponding to a 1.9V supply rail, with ±0.5% accuracy over the full –40°C to +125°C operating temperature range. This specification is confirmed in the device's Electrical Characteristics table and applies specifically to the EG19 variant, not generic family values.
Does the TPS3808EG19DBVRQ1 support programmable reset delay, and how is it implemented?
Yes, the TPS3808EG19DBVRQ1 supports programmable reset delay from 1.25ms to 150s using an external capacitor on the CT pin. A ≥130pF capacitor connected between CT and GND sets the delay; the internal 220nA current source charges it to a threshold, determining timeout. Open CT yields 20ms; resistor-to-VDD yields 300ms.
Can the TPS3808EG19DBVRQ1 monitor a voltage rail different from its own supply voltage?
Yes, the TPS3808EG19DBVRQ1 uses separate SENSE and VDD pins, allowing it to monitor a 1.9V rail (via SENSE) while being powered from a different supply such as 3.3V or 5V on VDD. This isolation ensures accurate supervision even during VDD brownouts or mixed-voltage system designs.
What is the quiescent current of the TPS3808EG19DBVRQ1, and why does it matter for automotive use?
The TPS3808EG19DBVRQ1 draws only 0.6μA typical quiescent current. This ultra-low IQ is critical for automotive always-on systems-such as telematics or body control modules-where continuous supervision must not accelerate battery discharge during extended vehicle-off periods.
Is the TPS3808EG19DBVRQ1 AEC-Q100 qualified, and what grade does it meet?
Yes, the TPS3808EG19DBVRQ1 is AEC-Q100 qualified and meets Grade 1 specifications, meaning it is rated for operation from –40°C to +125°C junction temperature and has passed stress tests including HTOL, TC, and ESD per automotive reliability standards.
TPS3808EG19DBVRQ1 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:
- 1.77V
- 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
TPS3808EG19DBVRQ1 FAQ
1.How can I place an order for TPS3808EG19DBVRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3808EG19DBVRQ1 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 TPS3808EG19DBVRQ1 reliable?
The price and inventory of TPS3808EG19DBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3808EG19DBVRQ1 is usually 5 days.
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TPS3808EG19DBVRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3808EG19DBVRQ1 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 TPS3808EG19DBVRQ1?
For technical support, including TPS3808EG19DBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3808EG19DBVRQ1 requirements.
6.How does Aetrix verify that TPS3808EG19DBVRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS3808EG19DBVRQ1 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 TPS3808EG19DBVRQ1 meets industry standards.
7.What is the process for return or replacement of TPS3808EG19DBVRQ1?
All TPS3808EG19DBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS3808EG19DBVRQ1, 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 TPS3808EG19DBVRQ1 part is unused and in its original packaging.
Return procedure for TPS3808EG19DBVRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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