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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Supervisors

Texas Instruments TPS3808G18QDBVRQ1

Name: TPS3808G18QDBVRQ1
Brand: Texas Instruments
SKU: TPS3808G18QDBVRQ1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TPS3808G18QDBVRQ1

Manufacturer:: Texas Instruments

Category:: Supervisors

Package:: SOT-23-6

Datasheet:: TPS3808G18QDBVRQ1.pdf

Description:: IC SUPERVISOR 1 CHANNEL SOT23-6

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Product details

Overview

TPS3808G18QDBVRQ1 from Texas Instruments is an automotive-grade, low-quiescent-current supervisory circuit that monitors 1.8 V system rails and asserts an open-drain RESET signal upon undervoltage or manual reset assertion. It features 0.5% threshold accuracy (1.67 V nominal), 2.4 μA typical supply current, and user-programmable reset delay from 1.25 ms to 10 s via external capacitor on CT pin. Used in DSP, FPGA, and automotive radar power sequencing.

For engineers reviewing the TPS3808G18QDBVRQ1 datasheet, TPS3808G18QDBVRQ1 pinout, TPS3808G18QDBVRQ1 application, or TPS3808G18QDBVRQ1 equivalent, key selection criteria include its AEC-Q100 qualification, SOT-23-6 package, fixed 1.67 V threshold, –40°C to +125°C operation, and compatibility with battery-powered automotive subsystems requiring precise, low-power reset supervision.

Technical Context

The TPS3808G18QDBVRQ1 implements a precision bandgap reference and comparator architecture to achieve ±0.5% VIT accuracy at 1.67 V over temperature. Its internal 90 kΩ MR pullup, 220 nA CT charging current source, and hysteresis-enabled SENSE input enable robust immunity to transients and stable reset assertion/deassertion.

It operates across 1.8 V to 6.5 V VDD, supports three delay configurations-open CT (20 ms), CT-to-VDD (300 ms), or CT-to-GND capacitor (1.25 ms–10 s)-and uses an open-drain RESET output requiring external pullup (10 kΩ–1 MΩ) for voltage-level flexibility up to 6.5 V.

Key Specifications

Parameter	Value and Actual Design Meaning
Threshold Voltage (V_IT)	1.67 V ±0.5% - precisely matches 1.8 V rail monitoring with minimal guardband required.
Quiescent Current (I_DD)	2.4 μA typical - enables multi-year battery life in always-on automotive modules.
Reset Delay Range	1.25 ms to 10 s - programmable via CT pin capacitor; supports fast boot or long hold-off timing.
Operating Temperature	–40°C to +125°C - fully qualified for under-hood automotive applications per AEC-Q100 Grade 1.
Output Type	Open-drain RESET - allows level-shifting, wired-OR, and compatibility with >VDD logic interfaces.
SENSE Input Bias	±25 nA max - minimizes loading on monitored rail and enables high-impedance sensing.
MR Pullup Resistance	90 kΩ internal - permits direct GPIO connection without external pullup; reduces BOM count.

Pinout & Package

SOT-23-6 package (2.90 mm × 1.60 mm), thermally enhanced with exposed pad option (not used in DBVRQ1 variant); suitable for space-constrained automotive PCBs.

Pin/Terminal	Circuit Role	Design Meaning
1: RESET	Open-drain output	Asserts low during reset; requires external pullup; supports voltage levels up to 6.5 V.
2: GND	Ground reference	Primary return path for internal circuitry and SENSE comparator; connects to system ground plane.
3: MR	Manual reset input	Active-low trigger; internally pulled up to VDD (90 kΩ); logic low <0.3×VDD asserts RESET.
4: CT	Delay timing control	Connect to GND via capacitor (≥100 pF) for programmable delay; open = 20 ms, tied to VDD = 300 ms.
5: SENSE	Voltage monitoring input	Monitors 1.8 V rail directly; comparator triggers at 1.67 V with 1–2% hysteresis; bias current ≤25 nA.
6: VDD	Supply input	Power source (1.8–6.5 V); requires local 0.1 µF ceramic decoupling; powers internal reference and logic.

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.
0.5% V_IT accuracy (≤3.3 V)	Reduces need for design margin; enables tighter power-rail tolerance compliance in 1.8 V systems.
220 nA CT charging current	Enables precise, temperature-stable delay timing using low-cost ceramic capacitors (no trimming needed).
SENSE transient immunity	Rejects short negative spikes (<20 µs) below V_IT, preventing false resets in noisy automotive environments.
Internal MR pullup (90 kΩ)	Eliminates external resistor; simplifies layout and reduces component count in microcontroller reset circuits.

Applications

Automotive Radar Power Sequencing	DSP Core Voltage Monitoring
Use Scenario: Monitors 1.8 V VCORE supply for 77 GHz radar SoC during cold-start and load transients. IC Role / Device Role / Timing Role: Supervisory IC asserting open-drain RESET to halt DSP boot until VCORE stabilizes above 1.67 V. Use Value: Prevents corrupted firmware execution by enforcing minimum 1.25 ms reset hold time after VCORE recovery.	Use Scenario: Ensures clean reset of TI C6000 DSP during 1.8 V I/O rail brownout events in infotainment head units. IC Role / Device Role / Timing Role: Voltage supervisor generating synchronized RESET pulse to DSP's nRST pin via 50 kΩ pullup. Use Value: Leverages 2.4 μA quiescent current to extend backup battery runtime during vehicle sleep mode.
FPGA Configuration Integrity	ADAS Camera Module Reset Control
Use Scenario: Validates 1.8 V auxiliary supply before enabling Xilinx Zynq-7000 configuration memory load. IC Role / Device Role / Timing Role: Resets FPGA configuration controller when SENSE drops below 1.67 V; delay set to 300 ms. Use Value: Uses CT-to-VDD resistor configuration for deterministic, production-ready timing without capacitor tolerance drift.	Use Scenario: Provides fail-safe reset to Sony IMX490 image sensor and companion ISP in rear-view camera ECU. IC Role / Device Role / Timing Role: Automotive-qualified supervisor asserting RESET on 1.8 V analog front-end rail collapse. Use Value: Achieves <1.5% total V_IT error across temperature, ensuring consistent reset point despite under-hood thermal cycling.

Automotive Radar Power Sequencing

DSP Core Voltage Monitoring

Use Scenario: Monitors 1.8 V VCORE supply for 77 GHz radar SoC during cold-start and load transients.

IC Role / Device Role / Timing Role: Supervisory IC asserting open-drain RESET to halt DSP boot until VCORE stabilizes above 1.67 V.

Use Value: Prevents corrupted firmware execution by enforcing minimum 1.25 ms reset hold time after VCORE recovery.

Use Scenario: Ensures clean reset of TI C6000 DSP during 1.8 V I/O rail brownout events in infotainment head units.

IC Role / Device Role / Timing Role: Voltage supervisor generating synchronized RESET pulse to DSP's nRST pin via 50 kΩ pullup.

Use Value: Leverages 2.4 μA quiescent current to extend backup battery runtime during vehicle sleep mode.

FPGA Configuration Integrity

ADAS Camera Module Reset Control

Use Scenario: Validates 1.8 V auxiliary supply before enabling Xilinx Zynq-7000 configuration memory load.

IC Role / Device Role / Timing Role: Resets FPGA configuration controller when SENSE drops below 1.67 V; delay set to 300 ms.

Use Value: Uses CT-to-VDD resistor configuration for deterministic, production-ready timing without capacitor tolerance drift.

Use Scenario: Provides fail-safe reset to Sony IMX490 image sensor and companion ISP in rear-view camera ECU.

IC Role / Device Role / Timing Role: Automotive-qualified supervisor asserting RESET on 1.8 V analog front-end rail collapse.

Use Value: Achieves <1.5% total V_IT error across temperature, ensuring consistent reset point despite under-hood thermal cycling.

Equivalent & Alternatives

The following parts are listed as comparable options for similar supervisory circuit applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TPS3808G33QDBVRQ1	Fixed 3.07 V threshold; same package, pinout, and delay programming.	Designed for 3.3 V rail monitoring-not interchangeable for 1.8 V systems without redesign.	Select only when supervising 3.3 V supplies; identical footprint but different V_IT calibration.
MAX6373KA21+T	2.1 V threshold (±1.5%), 3.5 μA I_DD, fixed 200 ms delay, SOT-23-5 package.	Lacks CT programmability and MR input; no AEC-Q100 qualification.	Use in non-automotive, cost-sensitive industrial designs where fixed delay and lower accuracy are acceptable.

Compared with TPS3808G18QDBVRQ1, TPS3808G33QDBVRQ1 offers identical functionality but targets 3.3 V rails, while MAX6373KA21+T provides lower cost and simpler timing at the expense of automotive qualification, programmability, and threshold precision.

Availability

TPS3808G18QDBVRQ1 is available at Aetrix Electronics and suitable for automotive radar, ADAS camera modules, and DSP power sequencing requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle support.

Supply support for TPS3808G18QDBVRQ1 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, with leadership in automotive, industrial, and power management ICs.

The TPS3808Gxx-Q1 product line delivers low-power, high-accuracy voltage supervision for automotive electronics, specifically engineered for reliable reset generation in safety-critical ADAS and infotainment subsystems.

FAQ

What is the exact threshold voltage of the TPS3808G18QDBVRQ1?

The TPS3808G18QDBVRQ1 has a nominal threshold voltage (V_IT) of 1.67 V with ±0.5% accuracy over temperature (–40°C to +125°C). This value is factory-trimmed and specified in the Electrical Characteristics table of the SBVS085J datasheet. It is designed to monitor 1.8 V rails with appropriate noise margin and does not require external adjustment.

Does the TPS3808G18QDBVRQ1 support programmable reset delay, and how is it configured?

Yes, the TPS3808G18QDBVRQ1 supports programmable reset delay via the CT pin. Leaving CT open yields a 20 ms delay; connecting CT to VDD through a 40–200 kΩ resistor gives 300 ms; connecting CT to GND via a ≥100 pF capacitor enables user-defined delays from 1.25 ms to 10 s. The delay is generated by an internal 220 nA current source charging the capacitor to 1.23 V.

Is the TPS3808G18QDBVRQ1 qualified for automotive applications?

Yes, the TPS3808G18QDBVRQ1 is AEC-Q100 Grade 1 qualified (–40°C to +125°C) and explicitly designed for automotive use. It meets stringent reliability, ESD (±2000 V HBM), and thermal performance requirements documented in the SBVS085J datasheet, making it suitable for radar, camera, and infotainment ECUs.

What package type and pin count does the TPS3808G18QDBVRQ1 use?

The TPS3808G18QDBVRQ1 uses the SOT-23-6 package (DBV suffix), measuring 2.90 mm × 1.60 mm. It has six pins: RESET, GND, MR, CT, SENSE, and VDD - arranged in standard SOT-23 top-view order. No thermal pad is present in this DBVRQ1 variant.

Can the TPS3808G18QDBVRQ1 monitor voltages other than 1.8 V?

No - the TPS3808G18QDBVRQ1 is a fixed-threshold device calibrated for 1.67 V (1.8 V rail). To monitor other voltages, select the corresponding part: e.g., TPS3808G33QDBVRQ1 for 3.3 V (3.07 V threshold) or TPS3808G01QDBVRQ1 for adjustable thresholds down to 0.405 V. Cross-referencing the Device Comparison Table confirms V_IT is part-number-specific.

TPS3808G18QDBVRQ1 Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: -

Package/Case:: SOT-23-6

Packaging:: Tape & Reel (TR)

Product Status:: Active

Programmable:: Not Verified

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:: Adjustable/Selectable

Operating Temperature:: -40°C ~ 125°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-6

TPS3808G18QDBVRQ1 FAQ

1.How can I place an order for TPS3808G18QDBVRQ1 through Aetrix?

Please submit a Request for Quotation (RFQ) for TPS3808G18QDBVRQ1 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 TPS3808G18QDBVRQ1 reliable?

The price and inventory of TPS3808G18QDBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3808G18QDBVRQ1 is usually 5 days.

3.What payment methods are accepted for TPS3808G18QDBVRQ1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3808G18QDBVRQ1 transactions.

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4.How is shipping managed for TPS3808G18QDBVRQ1?

TPS3808G18QDBVRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TPS3808G18QDBVRQ1 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 TPS3808G18QDBVRQ1?

For technical support, including TPS3808G18QDBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3808G18QDBVRQ1 requirements.

6.How does Aetrix verify that TPS3808G18QDBVRQ1 is sourced from the original manufacturer or authorized distributors?

All TPS3808G18QDBVRQ1 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 TPS3808G18QDBVRQ1 meets industry standards.

7.What is the process for return or replacement of TPS3808G18QDBVRQ1?

All TPS3808G18QDBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS3808G18QDBVRQ1, 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 TPS3808G18QDBVRQ1 part is unused and in its original packaging.

Return procedure for TPS3808G18QDBVRQ1:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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