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

Texas Instruments TPS3808EG50DBVRQ1

Name: TPS3808EG50DBVRQ1
Brand: Texas Instruments
SKU: TPS3808EG50DBVRQ1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TPS3808EG50DBVRQ1

Manufacturer:: Texas Instruments

Category:: Supervisors

Package:: SOT-23-6

Datasheet:: TPS3808EG50DBVRQ1.pdf

Description:: AUTOMOTIVE, 600NA ULTRA-LOW QUIE

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Product details

Overview

TPS3808EG50DBVRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-grade microprocessor supervisory circuit that monitors 5V power rails with ±0.5% threshold accuracy (4.65V 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 and draws only 0.6μA typical quiescent current.

For engineers reviewing the TPS3808EG50DBVRQ1 datasheet, TPS3808EG50DBVRQ1 pinout, TPS3808EG50DBVRQ1 application, or TPS3808EG50DBVRQ1 equivalent, key selection considerations include its fixed 5V monitoring threshold, SOT-23-6 package compatibility with space-constrained ADAS and digital cockpit designs, CT-pin programmable reset timing, and integrated 90kΩ MR pull-up resistor for simplified system integration.

Technical Context

The TPS3808EG50DBVRQ1 uses a precision internal reference to achieve ±0.5% undervoltage threshold accuracy at 4.65V and incorporates built-in hysteresis (1–2.5%) to prevent oscillatory reset assertion during voltage transients. Its reset delay is determined by an on-chip 220nA current source charging an external capacitor connected to the CT pin.

It features separate SENSE and VDD pins for independent monitoring and supply, an open-drain RESET output requiring an external pull-up (10kΩ–1MΩ), and a manual reset input (MR) with internal 90kΩ pull-up-enabling both autonomous power-rail supervision and processor-initiated reset coordination in automotive domain controllers.

Key Specifications

Parameter	Value and Actual Design Meaning
Threshold Voltage	4.65V nominal (±0.5% accuracy); precisely monitors 5V rails without external divider
Quiescent Current	0.6μA typical; enables always-on battery monitoring in automotive infotainment and telematics
Reset Delay Range	1.25ms–150s; set via CT pin capacitor (≥130pF), enabling compliance with diverse MCU boot timing
Operating Temp	–40°C to +125°C (T_J); qualified per AEC-Q100 Grade 1 for under-hood and cockpit applications
Supply Voltage	1.7V–6V; supports wide-input systems including 3.3V, 5V, and 12V-derived rails
Output Type	Open-drain RESET; allows level-shifting up to 6V and wired-OR with other reset sources
MR Input	Logic-compatible with 0.3V_DD/0.7V_DD thresholds and internal 90kΩ pull-up; eliminates external biasing

Pinout & Package

TPS3808EG50DBVRQ1 is housed in a compact 6-pin SOT-23 (DBV) package measuring 2.90mm × 1.60mm, optimized for high-density automotive PCB layouts.

Pin/Terminal	Circuit Role	Design Meaning
RESET	Open-drain output	Asserts low during undervoltage or MR event; requires external pull-up (10kΩ–1MΩ) to define logic-high level
GND	Ground reference	Common return path for internal circuitry and external decoupling; must be low-impedance
MR	Manual reset input	Drives RESET low when pulled ≤0.3V_DD; internally pulled up to VDD via 90kΩ resistor
CT	Reset delay programming	Connects to ground-referenced capacitor (≥130pF) to set delay from 1.25ms–150s; open = 20ms, tied to VDD = 300ms
SENSE	Monitoring input	Directly senses 5V rail (or other voltage via divider); trips at 4.65V with 1–2.5% hysteresis
VDD	Supply input	Powers internal circuitry; requires 0.1μF ceramic capacitor placed adjacent to pin

Key Features

Feature	Design Value
AEC-Q100 Grade 1 qualification	Validated for automotive use across –40°C to +125°C junction temperature
Fixed 5V threshold option	Eliminates external resistor divider, reducing BOM count and layout area in 5V-supervised systems
0.6μA quiescent current	Enables continuous supervision of battery-backed domains without measurable drain impact
Programmable reset delay	Supports precise alignment with MCU boot sequences-from fast 1.25ms recovery to 150s safety-critical timeouts
Separate SENSE/VDD pins	Allows monitoring of one rail (e.g., 5V) while powered from another (e.g., 3.3V), improving system flexibility

Applications

ADAS Domain Controller	Automotive Gateway
Use Scenario: Monitors primary 5V supply powering radar fusion processors and camera interface ICs during cold cranking and load dump events. IC Role / Device Role / Timing Role: Supervises 5V rail integrity and asserts RESET if voltage drops below 4.65V; delay set to 100ms to avoid false triggers during transient dips. Use Value: Prevents corrupted sensor data ingestion and unsafe actuation by ensuring processor reset occurs only after stable 5V restoration.	Use Scenario: Ensures reliable startup and fault recovery of multi-protocol gateway MCU handling CAN FD, Ethernet, and LIN communication stacks. IC Role / Device Role / Timing Role: Provides synchronized reset initiation across subsystems using MR pin driven by gateway firmware upon watchdog timeout. Use Value: Guarantees deterministic recovery from communication lockups without requiring hardware redesign or additional reset logic.
Digital Cockpit Processing Unit	Telematics Control Unit
Use Scenario: Supervises 5V power to application SoC and GPU in head-up display and infotainment clusters exposed to wide thermal cycling. IC Role / Device Role / Timing Role: Uses SOT-23-6 footprint and 0.6μA I_DD to minimize board area and leakage in always-on display wake-up circuits. Use Value: Maintains functional safety compliance (ISO 26262 ASIL-B ready) while extending battery runtime in parked vehicle modes.	Use Scenario: Monitors 5V supply feeding cellular modem, GNSS receiver, and secure element in vehicle-to-cloud connectivity modules. IC Role / Device Role / Timing Role: Configured with 150s CT delay to accommodate extended modem initialization sequences after deep sleep wake-up. Use Value: Avoids premature MCU reset during modem firmware handshake, eliminating repeated network reconnection attempts.

ADAS Domain Controller

Automotive Gateway

Use Scenario: Monitors primary 5V supply powering radar fusion processors and camera interface ICs during cold cranking and load dump events.

IC Role / Device Role / Timing Role: Supervises 5V rail integrity and asserts RESET if voltage drops below 4.65V; delay set to 100ms to avoid false triggers during transient dips.

Use Value: Prevents corrupted sensor data ingestion and unsafe actuation by ensuring processor reset occurs only after stable 5V restoration.

Use Scenario: Ensures reliable startup and fault recovery of multi-protocol gateway MCU handling CAN FD, Ethernet, and LIN communication stacks.

IC Role / Device Role / Timing Role: Provides synchronized reset initiation across subsystems using MR pin driven by gateway firmware upon watchdog timeout.

Use Value: Guarantees deterministic recovery from communication lockups without requiring hardware redesign or additional reset logic.

Digital Cockpit Processing Unit

Telematics Control Unit

Use Scenario: Supervises 5V power to application SoC and GPU in head-up display and infotainment clusters exposed to wide thermal cycling.

IC Role / Device Role / Timing Role: Uses SOT-23-6 footprint and 0.6μA I_DD to minimize board area and leakage in always-on display wake-up circuits.

Use Value: Maintains functional safety compliance (ISO 26262 ASIL-B ready) while extending battery runtime in parked vehicle modes.

Use Scenario: Monitors 5V supply feeding cellular modem, GNSS receiver, and secure element in vehicle-to-cloud connectivity modules.

IC Role / Device Role / Timing Role: Configured with 150s CT delay to accommodate extended modem initialization sequences after deep sleep wake-up.

Use Value: Avoids premature MCU reset during modem firmware handshake, eliminating repeated network reconnection attempts.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TPS3808G50DBVRQ1	Same pinout and electrical specs; differs only in production lot traceability and packaging marking per TI's Q1 revision control	No functional difference; used interchangeably in new designs and legacy BOM updates	Select TPS3808G50DBVRQ1 for standard automotive qualification with identical performance
MAX6326LT50D3+T	Fixed 5V threshold, 200ms factory-set delay, 1.5μA I_DD, SOT23-6 package; no CT/MR programmability	Lacks adjustable delay and manual reset-suitable only where fixed timing suffices and MR coordination is unnecessary	Choose MAX6326LT50D3+T only when design constraints prohibit external capacitor routing or require zero-config reset behavior

Compared with TPS3808EG50DBVRQ1, TPS3808G50DBVRQ1 offers identical functionality with updated manufacturing traceability, while MAX6326LT50D3+T trades programmability for lower design complexity-making it viable only in fixed-timing, non-MR automotive subsystems.

Availability

TPS3808EG50DBVRQ1 is available at Aetrix Electronics and suitable for ADAS domain controllers, automotive gateways, and digital cockpit processing units requiring stable component supply, long-term automotive lifecycle support, and AEC-Q100-compliant supervision.

Supply support for TPS3808EG50DBVRQ1 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, functional safety, and power management.

The TPS3808E-Q1 product line delivers ultra-low-power, AEC-Q100-qualified supervisory circuits designed specifically for automotive power-rail monitoring in ADAS, cockpit, and connectivity systems where reliability, precision, and long-term supply stability are critical.

FAQ

What is the exact threshold voltage and accuracy of the TPS3808EG50DBVRQ1?

The TPS3808EG50DBVRQ1 has a nominal undervoltage threshold of 4.65V with ±0.5% accuracy over temperature (–40°C to +125°C). This specification applies specifically to the EG50 variant and is verified per AEC-Q100 test conditions. The device achieves this precision using an internal bandgap reference and trimmed comparator, eliminating need for external calibration in 5V rail supervision.

How is the reset delay time configured on the TPS3808EG50DBVRQ1?

The TPS3808EG50DBVRQ1 reset delay is configured via the CT pin: leaving CT open yields ~20ms, connecting CT to VDD through a 40kΩ–200kΩ resistor yields ~300ms, and connecting CT to GND via a ≥130pF capacitor enables user-adjustable delays from 1.25ms to 150s. The delay is generated by an internal 220nA current source charging the external capacitor, and the TPS3808EG50DBVRQ1 datasheet provides Equation 1 for precise calculation.

Does the TPS3808EG50DBVRQ1 require an external pull-up resistor on the RESET pin?

Yes, the TPS3808EG50DBVRQ1 RESET pin is open-drain and requires an external pull-up resistor between 10kΩ and 1MΩ to define the logic-high state. This resistor may connect to a voltage higher than VDD (up to 6V), enabling level-shifted reset signaling. The TPS3808EG50DBVRQ1 itself does not integrate a pull-up; omission results in undefined RESET behavior during deassertion.

Can the TPS3808EG50DBVRQ1 monitor voltages other than 5V?

The TPS3808EG50DBVRQ1 is factory-trimmed for 5V (4.65V threshold) supervision and is not adjustable-its SENSE pin directly monitors 5V rails. To supervise other voltages, select alternate variants (e.g., TPS3808EG33DBVRQ1 for 3.3V) or use the adjustable TPS3808EG01DBVRQ1 with external resistor divider. Using TPS3808EG50DBVRQ1 for non-5V rails violates its specified operating conditions and invalidates threshold accuracy.

What is the purpose of the separate SENSE and VDD pins on the TPS3808EG50DBVRQ1?

The separate SENSE and VDD pins allow the TPS3808EG50DBVRQ1 to monitor one voltage rail (e.g., 5V) while being powered from another (e.g., 3.3V or 12V-derived 5V), decoupling supervision function from local supply noise and enabling flexible power architecture. This isolation improves immunity to VDD transients and permits monitoring of unregulated or higher-voltage rails without exposing internal circuitry to overvoltage stress.

TPS3808EG50DBVRQ1 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:: 4.65V

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

TPS3808EG50DBVRQ1 FAQ

1.How can I place an order for TPS3808EG50DBVRQ1 through Aetrix?

Please submit a Request for Quotation (RFQ) for TPS3808EG50DBVRQ1 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 TPS3808EG50DBVRQ1 reliable?

The price and inventory of TPS3808EG50DBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3808EG50DBVRQ1 is usually 5 days.

3.What payment methods are accepted for TPS3808EG50DBVRQ1?

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4.How is shipping managed for TPS3808EG50DBVRQ1?

TPS3808EG50DBVRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TPS3808EG50DBVRQ1 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 TPS3808EG50DBVRQ1?

For technical support, including TPS3808EG50DBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3808EG50DBVRQ1 requirements.

6.How does Aetrix verify that TPS3808EG50DBVRQ1 is sourced from the original manufacturer or authorized distributors?

All TPS3808EG50DBVRQ1 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 TPS3808EG50DBVRQ1 meets industry standards.

7.What is the process for return or replacement of TPS3808EG50DBVRQ1?

All TPS3808EG50DBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS3808EG50DBVRQ1, 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 TPS3808EG50DBVRQ1 part is unused and in its original packaging.

Return procedure for TPS3808EG50DBVRQ1:

1.Submit a request within 90 days.

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

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