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

Texas Instruments TPS3809I50DBVRG4

Name: TPS3809I50DBVRG4
Brand: Texas Instruments
SKU: TPS3809I50DBVRG4
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TPS3809I50DBVRG4

Manufacturer:: Texas Instruments

Category:: Supervisors

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: TPS3809I50DBVRG4.pdf

Description:: IC SUPERVISOR 1 CHANNEL SOT23-3

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Product details

Overview

TPS3809I50DBVRG4 from Texas Instruments is a 3-pin SOT-23 precision supply voltage supervisor IC designed for power-on reset and brownout detection in processor-based systems. It features a fixed 4.55 V threshold voltage, 200 ms reset delay (typ), 9 μA typical supply current, push-pull active-low RESET output, and operates across –40°C to +85°C - used in servers, motor drives, and building automation for reliable system initialization.

For engineers reviewing the TPS3809I50DBVRG4 datasheet, TPS3809I50DBVRG4 pinout, TPS3809I50DBVRG4 application, or TPS3809I50DBVRG4 equivalent, key selection criteria include its precise 4.55 V trip point, SOT-23 (DBV) package compatibility with MAX809 footprints, low quiescent current, and absence of external components in reset circuit design.

Technical Context

The TPS3809I50DBVRG4 integrates an internal 1.137 V reference, comparator, timer, and push-pull output stage to generate a clean, glitch-free active-low RESET signal. Its threshold is set by a factory-trimmed internal resistor divider, delivering ±1.1% accuracy over temperature (4.45 V to 4.65 V).

During power-up, RESET asserts when VDD exceeds 1.1 V and remains active until VDD rises above 4.55 V, then holds for 200 ms (typ) before deassertion; on undervoltage, RESET reasserts immediately when VDD falls below the hysteresis-adjusted threshold (4.55 V ± 60 mV).

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	2 V to 6 V - supports wide input rail tolerance and accommodates post-regulator monitoring.
Threshold Voltage (V_IT)	4.55 V (typ), 4.45–4.65 V (min/max) - precisely monitors 5 V supply rails with minimal deviation.
Reset Delay Time (t_d)	200 ms (typ), 120–280 ms (min/max) - ensures sufficient hold time for full processor/core initialization.
Supply Current (I_DD)	9 μA (typ) at 2 V - enables ultra-low-power operation in battery-backed or energy-sensitive systems.
Output Type	Push-pull active-low RESET - eliminates need for external pull-up resistor and reduces BOM count.
Threshold Hysteresis	60 mV - prevents oscillation during slow-rising or noisy supply transitions near trip point.
Operating Temperature	–40°C to +85°C - qualified for industrial-grade embedded and infrastructure applications.

Pinout & Package

SOT-23 (DBV) package: 2.90 mm × 1.60 mm body, 1.45 mm max height, 3-pin surface-mount outline with GND (Pin 1), RESET (Pin 2), and VDD (Pin 3).

Pin/Terminal	Circuit Role	Design Meaning
GND	Ground reference	Low-impedance return path for internal circuitry; must be connected directly to system ground plane.
RESET	Active-low reset output	Push-pull driver capable of sinking 5 mA; asserts low during power-up/brownout and deasserts after 200 ms delay.
VDD	Supply input	Monitored voltage rail; requires 0.1 µF ceramic bypass capacitor to GND for stable threshold performance.

Key Features

Feature	Design Value
Fixed 4.55 V threshold	Factory-trimmed internal divider ensures ±1.1% accuracy without calibration or external resistors.
200 ms programmable delay	Internal timer guarantees minimum reset pulse width independent of external RC networks.
9 μA typical supply current	Enables use in always-on monitoring circuits without impacting system standby power budget.
Push-pull RESET output	Eliminates external pull-up resistor, reduces board space, and improves noise immunity vs open-drain alternatives.
Pin-for-pin compatible with MAX809	Direct drop-in replacement for legacy designs using MAX809J50, simplifying upgrade paths and inventory consolidation.

Applications

Server Power Sequencing	Industrial Motor Drive Control
Use Scenario: Monitors 5 V auxiliary supply in rack-mounted server management controllers to ensure proper boot sequence before enabling main CPU and memory rails. IC Role / Device Role / Timing Role: Precision voltage supervisor providing power-on reset assertion and brownout detection with 200 ms hold time. Use Value: Prevents firmware corruption and hardware lockup by guaranteeing full initialization of PMICs and baseboard management controllers before release.	Use Scenario: Integrated into gate driver power supply monitoring for 3-phase inverter modules in HVAC and pump drives. IC Role / Device Role / Timing Role: Active-low reset generator triggered by 5 V logic supply dip during high-current switching transients. Use Value: Enables immediate fault shutdown and safe restart via microcontroller reset, avoiding IGBT shoot-through or torque loss.
Smart Building Automation Panel	Electricity Meter MCU Supervision
Use Scenario: Ensures reliable startup of ARM Cortex-M based controllers in DIN-rail mounted HVAC controllers exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Industrial-grade voltage monitor with –40°C to +85°C operation and 4.55 V trip point aligned to metering SoC supply rails. Use Value: Eliminates cold-start failures and improves field reliability in unheated enclosures without adding thermal derating margin.	Use Scenario: Supervises 5 V DC-DC output powering metrology ASIC and secure bootloader in Class 0.2 electricity meters. IC Role / Device Role / Timing Role: Low-quiescent-current supervisor maintaining accurate reset timing under battery backup conditions. Use Value: Guarantees valid metering data integrity during AC line dropout by holding MCU in reset until stable 5 V rail is restored.

Server Power Sequencing

Industrial Motor Drive Control

Use Scenario: Monitors 5 V auxiliary supply in rack-mounted server management controllers to ensure proper boot sequence before enabling main CPU and memory rails.

IC Role / Device Role / Timing Role: Precision voltage supervisor providing power-on reset assertion and brownout detection with 200 ms hold time.

Use Value: Prevents firmware corruption and hardware lockup by guaranteeing full initialization of PMICs and baseboard management controllers before release.

Use Scenario: Integrated into gate driver power supply monitoring for 3-phase inverter modules in HVAC and pump drives.

IC Role / Device Role / Timing Role: Active-low reset generator triggered by 5 V logic supply dip during high-current switching transients.

Use Value: Enables immediate fault shutdown and safe restart via microcontroller reset, avoiding IGBT shoot-through or torque loss.

Smart Building Automation Panel

Electricity Meter MCU Supervision

Use Scenario: Ensures reliable startup of ARM Cortex-M based controllers in DIN-rail mounted HVAC controllers exposed to wide ambient temperature swings.

IC Role / Device Role / Timing Role: Industrial-grade voltage monitor with –40°C to +85°C operation and 4.55 V trip point aligned to metering SoC supply rails.

Use Value: Eliminates cold-start failures and improves field reliability in unheated enclosures without adding thermal derating margin.

Use Scenario: Supervises 5 V DC-DC output powering metrology ASIC and secure bootloader in Class 0.2 electricity meters.

IC Role / Device Role / Timing Role: Low-quiescent-current supervisor maintaining accurate reset timing under battery backup conditions.

Use Value: Guarantees valid metering data integrity during AC line dropout by holding MCU in reset until stable 5 V rail is restored.

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage supervisor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLV809E50DBVR	Same 4.55 V threshold, identical SOT-23 pinout, but lower 3.5 μA supply current and improved 0.5% threshold accuracy.	Preferred for ultra-low-power battery-backed systems where <5 μA standby current is critical.	Select TLV809E50DBVR if extended shelf life or energy harvesting compatibility is required; otherwise TPS3809I50DBVRG4 offers proven industrial robustness.
MAX809SEUR+T	4.63 V threshold (±2.5%), 140 ms reset delay, higher 15 μA supply current, same SOT-23 footprint.	Legacy-compatible alternative with looser tolerance; suitable for non-critical 5 V monitoring where cost is primary.	Choose MAX809SEUR+T only for cost-sensitive replacements where 80 mV higher trip point and reduced accuracy are acceptable.

Compared with TLV809E50DBVR and MAX809SEUR+T, the TPS3809I50DBVRG4 delivers tighter threshold accuracy than MAX809 while offering broader industrial temperature qualification than TLV809E - making it optimal for infrastructure applications demanding both precision and reliability.

Availability

TPS3809I50DBVRG4 is available at Aetrix Electronics and suitable for servers, motor drives, and building automation systems requiring stable component supply, long-term lifecycle support, and consistent electrical performance across production batches.

Supply support for TPS3809I50DBVRG4 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 specializing in analog, embedded processing, and power management technologies, with decades of experience in high-reliability industrial and infrastructure solutions.

The TPS3809 family was engineered specifically for robust, low-component-count power supervision in DSP and microprocessor systems - emphasizing precision threshold stability, minimal quiescent power, and seamless integration into compact PCB layouts.

FAQ

What is the exact threshold voltage of the TPS3809I50DBVRG4?

The TPS3809I50DBVRG4 has a nominal threshold voltage of 4.55 V, with a guaranteed range of 4.45 V to 4.65 V over the full –40°C to +85°C operating temperature range. This value is factory-trimmed and does not require external calibration or resistor networks.

Does the TPS3809I50DBVRG4 require an external pull-up resistor on the RESET pin?

No, the TPS3809I50DBVRG4 uses a push-pull output stage for the RESET pin, eliminating the need for an external pull-up resistor. This reduces component count, saves board space, and improves noise immunity compared to open-drain supervisors.

What is the reset delay time specification for the TPS3809I50DBVRG4?

The TPS3809I50DBVRG4 provides a typical reset delay time (t_d) of 200 ms after VDD rises above the 4.55 V threshold. The datasheet specifies a min/max range of 120 ms to 280 ms, ensuring reliable system initialization across process and temperature variations.

Is the TPS3809I50DBVRG4 pin-compatible with the MAX809 series?

Yes, the TPS3809I50DBVRG4 is explicitly designed as pin-for-pin compatible with the MAX809 family, including MAX809J50. It shares identical SOT-23 (DBV) pinout (GND, RESET, VDD), enabling direct replacement in existing layouts without PCB changes.

What package type and marking does the TPS3809I50DBVRG4 use?

The TPS3809I50DBVRG4 is supplied in a 3-pin SOT-23 (DBV) package with dimensions 2.90 mm × 1.60 mm and maximum height 1.45 mm. Its top-side marking is "PDCI", per TI's official packaging documentation and reel labeling standards.

TPS3809I50DBVRG4 Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: -

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Programmable:: Not Verified

Type:: Simple Reset/Power-On Reset

Number of Voltages Monitored:: 1

Voltage - Threshold:: 4.55V

Output:: Push-Pull, Totem Pole

Reset:: Active Low

Reset Timeout:: 120ms Minimum

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

TPS3809I50DBVRG4 FAQ

1.How can I place an order for TPS3809I50DBVRG4 through Aetrix?

Please submit a Request for Quotation (RFQ) for TPS3809I50DBVRG4 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 TPS3809I50DBVRG4 reliable?

The price and inventory of TPS3809I50DBVRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3809I50DBVRG4 is usually 5 days.

3.What payment methods are accepted for TPS3809I50DBVRG4?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3809I50DBVRG4 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TPS3809I50DBVRG4?

TPS3809I50DBVRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TPS3809I50DBVRG4 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 TPS3809I50DBVRG4?

For technical support, including TPS3809I50DBVRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3809I50DBVRG4 requirements.

6.How does Aetrix verify that TPS3809I50DBVRG4 is sourced from the original manufacturer or authorized distributors?

All TPS3809I50DBVRG4 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 TPS3809I50DBVRG4 meets industry standards.

7.What is the process for return or replacement of TPS3809I50DBVRG4?

All TPS3809I50DBVRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS3809I50DBVRG4, 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 TPS3809I50DBVRG4 part is unused and in its original packaging.

Return procedure for TPS3809I50DBVRG4:

1.Submit a request within 90 days.

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

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