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

Texas Instruments TPS3836K33DBVTG4

Name: TPS3836K33DBVTG4
Brand: Texas Instruments
SKU: TPS3836K33DBVTG4
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TPS3836K33DBVTG4

Manufacturer:: Texas Instruments

Category:: Supervisors

Package:: SC-74A, SOT-753

Datasheet:: TPS3836K33DBVTG4.pdf

Description:: IC SUPERVISOR 1 CHANNEL SOT23-5

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Product details

Overview

TPS3836K33DBVTG4 from Texas Instruments is a nano-power voltage supervisor IC designed for undervoltage monitoring and system reset generation in battery-powered microcontroller systems. It features a 2.93 V threshold voltage (V_IT), 220 nA typical supply current, push-pull active-low RESET output, and selectable 10 ms or 200 ms reset delay via the CT pin - deployed in a 5-pin SOT-23 package for space-constrained MSP430-based lithium-ion battery applications.

For engineers reviewing the TPS3836K33DBVTG4 datasheet, TPS3836K33DBVTG4 pinout, TPS3836K33DBVTG4 application, or TPS3836K33DBVTG4 equivalent, key selection criteria include its precise 2.93 V supervision level, ultra-low quiescent current, manual reset (MR) support, CT-configurable delay, and compatibility with 1.6–6 V supply rails in portable embedded systems.

Technical Context

The TPS3836K33DBVTG4 implements a precision bandgap-referenced comparator to monitor VDD against a fixed internal threshold (2.93 V typical), with 40 mV hysteresis (V_HYS) to prevent chatter during threshold crossings. Its reset assertion logic responds to either VDD falling below V_IT or MR pulled low, with propagation delays under 10 µs (t_PHL).

Delay timing is controlled externally via the CT pin: grounding CT selects ~10 ms delay; connecting CT to VDD selects ~200 ms delay. The push-pull RESET output drives actively high or low without requiring an external pullup resistor, simplifying interface with MSP430 and other low-voltage MCUs.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	1.6 V to 6 V - supports direct connection to Li-ion (3.6 V), coin cell, or regulated 3.3 V/2.5 V rails.
Threshold Voltage (V_IT)	2.93 V (typical), ±2.5% over –40°C to +85°C - ensures reliable reset at 3.0 V nominal system brownout point.
Supply Current (I_DD)	220 nA (typical) at VDD > V_IT - enables multi-year operation on small batteries without compromising supervision integrity.
Reset Delay Options	10 ms (CT = GND) or 200 ms (CT = VDD) - configurable timing for safe MCU initialization or post-brownout recovery hold-off.
Output Type	Active-low push-pull RESET - eliminates need for external pullup, reduces BOM count, and ensures fast, rail-to-rail drive into MCU reset input.
Propagation Delay (t_PHL)	10 µs (max) - guarantees rapid fault response (<11 µs) to supply collapse, critical for deterministic system recovery.
Operating Temperature	–40°C to +85°C - qualified for industrial and extended-temperature portable electronics environments.

Pinout & Package

TPS3836K33DBVTG4 is housed in a 5-pin SOT-23 (DBV) package measuring 2.90 mm × 1.60 mm, optimized for high-density PCB layouts in handheld and sensor-edge devices.

Pin/Terminal	Circuit Role	Design Meaning
VDD	Power Input	Main supply voltage input (1.6–6 V); monitored by internal comparator for threshold violation detection.
GND	Ground Reference	Analog and digital ground return; required for accurate threshold reference and noise immunity.
CT	Delay Configuration	Selects reset delay: grounded → 10 ms; tied to VDD → 200 ms; no external capacitor needed.
MR	Manual Reset Input	Active-low asynchronous reset trigger; if unused, must be tied to VDD to minimize leakage current.
RESET	Supervisor Output	Active-low push-pull output; asserts low during VDD < V_IT or MR low; deasserts after delay when conditions recover.

Key Features

Feature	Design Value
Nano-power operation	220 nA typical I_DD enables >10-year battery life in always-on monitoring applications using CR2032 or Li-ion cells.
Precision 2.93 V threshold	Guaranteed 2.84–2.99 V over temperature; matches 3.0 V system rails with margin for hysteresis and aging drift.
Configurable reset timing	No external RC components required - CT pin selects between 10 ms (fast boot) and 200 ms (robust recovery) delay.
Push-pull RESET output	Drives high/low actively - eliminates pullup resistor, reduces layout area, and improves noise immunity vs open-drain alternatives.
Manual reset support	Asynchronous MR input allows host-controlled system reset independent of supply voltage state.

Applications

Lithium-Ion Battery Monitoring	MSP430-Based Sensor Node
Use Scenario: Monitors 3.6 V Li-ion battery voltage in wearables to prevent deep discharge and data corruption during brownout. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low RESET to MSP430 when VDD falls below 2.93 V, with 200 ms delay to avoid false triggers from transient load spikes. Use Value: Prevents MCU lockup and flash memory corruption while extending usable battery capacity by enabling graceful shutdown before 2.8 V cutoff.	Use Scenario: Provides power-on and brownout reset for ultra-low-power MSP430FR2355 in environmental sensor nodes powered by energy harvesting. IC Role / Device Role / Timing Role: Initializes MCU at power-up and holds reset until stable 3.3 V rail is confirmed; MR pin enables firmware-triggered reinitialization. Use Value: Ensures deterministic startup and recovery with sub-µA quiescent draw, preserving harvested energy budget for sensing cycles.
Portable Medical Instrument	Industrial Handheld Terminal
Use Scenario: Supervises dual-supply (3.3 V logic + 1.8 V core) in FDA-cleared glucose meter with battery backup. IC Role / Device Role / Timing Role: Primary 3.3 V rail supervisor; CT = GND configures 10 ms delay for rapid power-on reset; MR supports user-initiated self-test. Use Value: Meets IEC 62304 safety requirements for fail-safe reset behavior and eliminates need for discrete reset IC + RC network.	Use Scenario: Ensures robust reset sequencing in barcode scanner operating from 3.6 V Li-Po battery across wide temperature (-20°C to 60°C). IC Role / Device Role / Timing Role: Monitors main supply and asserts RESET to ARM Cortex-M0+ processor; hysteresis prevents oscillation during cold-start voltage ramp. Use Value: Guarantees reliable boot under variable load and temperature, reducing field returns due to boot failures.

Lithium-Ion Battery Monitoring

MSP430-Based Sensor Node

Use Scenario: Monitors 3.6 V Li-ion battery voltage in wearables to prevent deep discharge and data corruption during brownout.

IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low RESET to MSP430 when VDD falls below 2.93 V, with 200 ms delay to avoid false triggers from transient load spikes.

Use Value: Prevents MCU lockup and flash memory corruption while extending usable battery capacity by enabling graceful shutdown before 2.8 V cutoff.

Use Scenario: Provides power-on and brownout reset for ultra-low-power MSP430FR2355 in environmental sensor nodes powered by energy harvesting.

IC Role / Device Role / Timing Role: Initializes MCU at power-up and holds reset until stable 3.3 V rail is confirmed; MR pin enables firmware-triggered reinitialization.

Use Value: Ensures deterministic startup and recovery with sub-µA quiescent draw, preserving harvested energy budget for sensing cycles.

Portable Medical Instrument

Industrial Handheld Terminal

Use Scenario: Supervises dual-supply (3.3 V logic + 1.8 V core) in FDA-cleared glucose meter with battery backup.

IC Role / Device Role / Timing Role: Primary 3.3 V rail supervisor; CT = GND configures 10 ms delay for rapid power-on reset; MR supports user-initiated self-test.

Use Value: Meets IEC 62304 safety requirements for fail-safe reset behavior and eliminates need for discrete reset IC + RC network.

Use Scenario: Ensures robust reset sequencing in barcode scanner operating from 3.6 V Li-Po battery across wide temperature (-20°C to 60°C).

IC Role / Device Role / Timing Role: Monitors main supply and asserts RESET to ARM Cortex-M0+ processor; hysteresis prevents oscillation during cold-start voltage ramp.

Use Value: Guarantees reliable boot under variable load and temperature, reducing field returns due to boot failures.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TPS3836K33DBVR	Same silicon, identical electrical specs; differs only in tape-and-reel quantity (3000 pcs vs 250 pcs) and part marking (PDNI vs unspecified).	No functional difference; suitable for high-volume production where reel size impacts assembly line efficiency.	Select DBVR for automated SMT lines requiring full reels; DBVTG4 preferred for prototyping and low-volume builds.
MAX6326UR31-T	3.08 V threshold, 1.6 µA I_DD, open-drain output, fixed 200 ms delay, SOT-23-5 package.	Higher quiescent current limits battery life; open-drain requires external pullup; less precise threshold tolerance (±2.5% vs ±2.5% but higher temp drift).	Use only if 3.08 V threshold better matches system rail; otherwise TPS3836K33DBVTG4 offers superior nano-power performance and push-pull simplicity.

Compared with TPS3836K33DBVR, the TPS3836K33DBVTG4 provides identical supervision functionality in the same package but optimized for small-batch procurement; versus MAX6326UR31-T, it delivers 7× lower supply current and eliminates external pullup components - directly reducing system power and BOM cost.

Availability

TPS3836K33DBVTG4 is available at Aetrix Electronics and suitable for lithium-ion battery management, MSP430-based sensor nodes, and portable medical instrumentation requiring stable component supply, long-lifecycle assurance, and guaranteed traceable sourcing.

Supply support for TPS3836K33DBVTG4 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 low-power design, precision analog, and industrial-grade reliability.

The TPS383x family was engineered specifically for ultra-low-power voltage supervision in battery-critical applications - emphasizing nano-ampere quiescent current, factory-trimmed thresholds, and minimal external component count for portable and energy-harvesting systems.

FAQ

What is the exact threshold voltage of the TPS3836K33DBVTG4?

The TPS3836K33DBVTG4 has a nominal threshold voltage (V_IT) of 2.93 V, with a guaranteed range of 2.84 V to 2.99 V over the full –40°C to +85°C operating temperature range. This value is factory-trimmed and specified in the Electrical Characteristics table of the official TI datasheet SLVS292F.

Does the TPS3836K33DBVTG4 require an external pullup resistor on the RESET pin?

No, the TPS3836K33DBVTG4 features a push-pull active-low RESET output and does not require an external pullup resistor. This distinguishes it from open-drain variants like the TPS3838 and reduces BOM count and board space in designs using the TPS3836K33DBVTG4.

How is the reset delay time configured on the TPS3836K33DBVTG4?

The reset delay time on the TPS3836K33DBVTG4 is selected via the CT pin: connect CT to GND for a typical 10 ms delay, or connect CT to VDD for a typical 200 ms delay. No external capacitor is needed - the timing is internally generated and factory-characterized.

Can the TPS3836K33DBVTG4 operate from a 1.8 V supply?

Yes, the TPS3836K33DBVTG4 operates from 1.6 V to 6 V, so it functions correctly at 1.8 V. However, its 2.93 V threshold means it will assert RESET continuously below that level - making it unsuitable for supervising 1.8 V rails. It is intended for 3.0–3.6 V systems like Li-ion battery interfaces.

What is the maximum supply current of the TPS3836K33DBVTG4 when VDD is below the threshold?

When VDD falls below the threshold voltage (V_IT), the TPS3836K33DBVTG4 draws up to 15 µA (maximum), per the IDD specification in Section 7.6 of the datasheet. This elevated current occurs only during fault condition and remains stable across temperature.

TPS3836K33DBVTG4 Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: -

Package/Case:: SC-74A, SOT-753

Packaging:: Tape & Reel (TR)

Product Status:: Discontinued at Digi-Key

Programmable:: Not Verified

Type:: Simple Reset/Power-On Reset

Number of Voltages Monitored:: 1

Voltage - Threshold:: 2.93V

Output:: Push-Pull, Totem Pole

Reset:: Active Low

Reset Timeout:: 10ms Minimum

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-5

TPS3836K33DBVTG4 FAQ

1.How can I place an order for TPS3836K33DBVTG4 through Aetrix?

Please submit a Request for Quotation (RFQ) for TPS3836K33DBVTG4 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 TPS3836K33DBVTG4 reliable?

The price and inventory of TPS3836K33DBVTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3836K33DBVTG4 is usually 5 days.

3.What payment methods are accepted for TPS3836K33DBVTG4?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3836K33DBVTG4 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TPS3836K33DBVTG4?

TPS3836K33DBVTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TPS3836K33DBVTG4 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 TPS3836K33DBVTG4?

For technical support, including TPS3836K33DBVTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3836K33DBVTG4 requirements.

6.How does Aetrix verify that TPS3836K33DBVTG4 is sourced from the original manufacturer or authorized distributors?

All TPS3836K33DBVTG4 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 TPS3836K33DBVTG4 meets industry standards.

7.What is the process for return or replacement of TPS3836K33DBVTG4?

All TPS3836K33DBVTG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS3836K33DBVTG4, 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 TPS3836K33DBVTG4 part is unused and in its original packaging.

Return procedure for TPS3836K33DBVTG4:

1.Submit a request within 90 days.

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

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