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

Texas Instruments TPS3836K33DBVT

Name: TPS3836K33DBVT
Brand: Texas Instruments
SKU: TPS3836K33DBVT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TPS3836K33DBVT

Manufacturer:: Texas Instruments

Category:: Supervisors

Package:: SC-74A, SOT-753

Datasheet:: TPS3836K33DBVT.pdf

Description:: IC SUPERVISOR 1 CHANNEL SOT23-5

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Product details

Overview

TPS3836K33 from Texas Instruments is a nano-power voltage supervisor IC designed for precision undervoltage monitoring in battery-powered systems. It features a fixed 2.93 V threshold (V_IT), 220 nA typical supply current, push-pull active-low RESET output, and selectable 10 ms or 200 ms reset delay via CT pin configuration-enabling reliable power-on and brownout reset for MSP430 microcontrollers powered by 3.6 V lithium-ion batteries.

For engineers reviewing the TPS3836K33 datasheet, TPS3836K33 pinout, TPS3836K33 application, or TPS3836K33 equivalent, key selection considerations include its SOT-23-5 package, –40°C to 85°C operating range, manual reset (MR) support, hysteresis of 40 mV, and compatibility with low-quiescent-current system-level power sequencing and fault recovery.

Technical Context

The TPS3836K33 implements a precision bandgap-based voltage comparator with internal hysteresis (V_HYS = 40 mV) to reject noise-induced false resets. Its reset assertion logic is triggered when VDD falls below 2.93 V (typical), and deassertion requires both VDD > V_IT + V_HYS and a stable delay period set by CT pin connection-GND for 10 ms or VDD for 200 ms.

It integrates a dedicated manual reset input (MR) with internal 30 kΩ pullup, enabling external system-initiated reset independent of supply voltage. The push-pull RESET output drives high/low actively without external components, eliminating need for pullup resistors unlike open-drain variants in the same family.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	1.6 V to 6 V - supports direct monitoring of 3.6 V Li-ion batteries with margin for transient drop and aging.
Threshold Voltage (V_IT)	2.93 V (typical), 2.84–2.99 V (min/max) - precisely matches 3.3 V nominal supply systems requiring 3 V brownout detection.
Supply Current (I_DD)	220 nA (typical) at VDD > V_IT, <1 µA max - enables multi-year operation on coin cells or energy-harvesting sources.
Reset Delay Options	10 ms (CT = GND) or 200 ms (CT = VDD) - configurable timing for MCU boot stabilization or battery recovery hold-off.
Output Type	Active-low push-pull - provides rail-to-rail RESET signal without external pullup, reducing BOM count and layout area.
Hysteresis (V_HYS)	40 mV - prevents oscillation during slow VDD ramp-up/down near threshold, critical for noisy battery rails.
Propagation Delay (t_PHL)	10 µs (max) - ensures fast response to undervoltage events while maintaining noise immunity.

Pinout & Package

TPS3836K33 is packaged in a 5-pin SOT-23 (DBV) case measuring 2.90 mm × 1.60 mm, optimized for space-constrained portable designs. Pin functions are validated per TI SLVS292F Rev F datasheet.

Pin/Terminal	Circuit Role	Design Meaning
VDD	Power input and monitored supply rail	Primary voltage source; device asserts RESET when VDD drops below 2.93 V; accepts 1.6–6 V input.
GND	Reference ground	Analog and digital return path; must be low-impedance to ensure accurate threshold sensing.
CT	Delay time configuration	Connect to GND for 10 ms delay or to VDD for 200 ms delay; no external capacitor required.
MR	Manual reset input	Active-low asynchronous reset trigger; internally pulled up to VDD (30 kΩ); tie to VDD if unused.
RESET	Active-low push-pull reset output	Drives low during fault (VDD < V_IT or MR = L); drives high otherwise; no external pullup needed.

Key Features

Feature	Design Value
Nano-power operation	220 nA typical I_DD enables >10-year battery life in always-on monitoring applications.
Precision 3.3 V supervision	2.93 V threshold with ±40 mV hysteresis ensures robust detection of 3.3 V system brownout without false triggers.
Selectably timed reset delay	Hardware-configurable 10 ms / 200 ms delay eliminates need for external RC timing networks or firmware delays.
Integrated manual reset	MR pin with internal 30 kΩ pullup simplifies system-level reset coordination and reduces external component count.
SOT-23-5 footprint	Industry-standard 5-pin package enables drop-in replacement and compatibility with existing pick-and-place workflows.

Applications

Portable Medical Sensors	MSP430-Based Data Loggers
Use Scenario: Continuous glucose monitor powered by CR2032 coin cell, requiring undervoltage lockout before sensor calibration fails. IC Role / Device Role / Timing Role: Voltage supervisor asserting RESET to halt MCU execution when battery drops below 2.93 V, preventing corrupted EEPROM writes. Use Value: 220 nA quiescent current extends operational life beyond 5 years; 200 ms delay (CT = VDD) avoids nuisance resets during brief load transients.	Use Scenario: Environmental data logger using MSP430FR5969, sampling temperature/humidity every 10 seconds from a 3.6 V Li-ion pack. IC Role / Device Role / Timing Role: Primary power-on reset generator and brownout detector, interfacing directly with MSP430's RST/NMI pin. Use Value: Push-pull RESET eliminates need for external pullup resistor; precise 2.93 V threshold aligns with MSP430's 3 V minimum VCC specification.
Wireless Sensor Nodes	Industrial Handheld Terminals
Use Scenario: LoRaWAN node with SX1276 transceiver and STM32L0, powered by rechargeable LiPo, requiring clean reset after deep discharge recovery. IC Role / Device Role / Timing Role: System-level voltage monitor ensuring MCU only resumes operation after battery recovers above hysteresis threshold for ≥200 ms. Use Value: 40 mV hysteresis prevents oscillation during battery recharge ramp; 10 ms delay option supports fast-boot firmware updates.	Use Scenario: Ruggedized barcode scanner with ARM Cortex-M4, operating in warehouse environments where 3.3 V rail may sag under motor drive loads. IC Role / Device Role / Timing Role: Critical brownout protection circuit that forces controlled shutdown before memory corruption or peripheral malfunction occurs. Use Value: –40°C to 85°C rating ensures reliability across thermal cycles; SOT-23-5 package withstands mechanical shock and vibration.

Portable Medical Sensors

MSP430-Based Data Loggers

Use Scenario: Continuous glucose monitor powered by CR2032 coin cell, requiring undervoltage lockout before sensor calibration fails.

IC Role / Device Role / Timing Role: Voltage supervisor asserting RESET to halt MCU execution when battery drops below 2.93 V, preventing corrupted EEPROM writes.

Use Value: 220 nA quiescent current extends operational life beyond 5 years; 200 ms delay (CT = VDD) avoids nuisance resets during brief load transients.

Use Scenario: Environmental data logger using MSP430FR5969, sampling temperature/humidity every 10 seconds from a 3.6 V Li-ion pack.

IC Role / Device Role / Timing Role: Primary power-on reset generator and brownout detector, interfacing directly with MSP430's RST/NMI pin.

Use Value: Push-pull RESET eliminates need for external pullup resistor; precise 2.93 V threshold aligns with MSP430's 3 V minimum VCC specification.

Wireless Sensor Nodes

Industrial Handheld Terminals

Use Scenario: LoRaWAN node with SX1276 transceiver and STM32L0, powered by rechargeable LiPo, requiring clean reset after deep discharge recovery.

IC Role / Device Role / Timing Role: System-level voltage monitor ensuring MCU only resumes operation after battery recovers above hysteresis threshold for ≥200 ms.

Use Value: 40 mV hysteresis prevents oscillation during battery recharge ramp; 10 ms delay option supports fast-boot firmware updates.

Use Scenario: Ruggedized barcode scanner with ARM Cortex-M4, operating in warehouse environments where 3.3 V rail may sag under motor drive loads.

IC Role / Device Role / Timing Role: Critical brownout protection circuit that forces controlled shutdown before memory corruption or peripheral malfunction occurs.

Use Value: –40°C to 85°C rating ensures reliability across thermal cycles; SOT-23-5 package withstands mechanical shock and vibration.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TPS3836H30DBVT	2.79 V threshold (vs. 2.93 V); identical pinout, package, and features	Designed for 3.0 V nominal systems; unsuitable where 3.3 V rail tolerance demands tighter 2.93 V trip point	Select only if system brownout threshold is specified at 2.79 V or lower; verify against actual supply rail tolerance.
TPS3838K33DBVT	Same 2.93 V threshold but open-drain RESET output (requires external pullup); otherwise identical timing and current specs	Used where shared reset bus or wired-OR logic is required; incompatible with direct MCU RST pin without pullup resistor	Choose only when system architecture mandates open-drain behavior; otherwise TPS3836K33 reduces component count.

Compared with TPS3836H30DBVT and TPS3838K33DBVT, the TPS3836K33 provides optimal fit for 3.3 V systems needing precise 2.93 V detection and minimal BOM-delivering push-pull simplicity, lowest effective quiescent current, and guaranteed compatibility with MSP430 reset inputs without design adaptation.

Availability

TPS3836K33 is available at Aetrix Electronics and suitable for portable medical sensors, MSP430-based data loggers, wireless sensor nodes, industrial handheld terminals, and battery management subsystems requiring stable component supply across long-lifecycle production programs.

Supply support for TPS3836K33 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 specializing in analog and embedded processing technologies, with leadership in power management, signal chain, and microcontroller solutions.

The TPS383x family was engineered specifically for ultra-low-power voltage supervision in battery-critical applications-targeting portable instrumentation, wearables, and energy-efficient microcontroller systems where nanoscale current and precise threshold accuracy are non-negotiable.

FAQ

What is the exact reset threshold voltage of the TPS3836K33?

The TPS3836K33 has a nominal reset threshold voltage (V_IT) of 2.93 V, with a guaranteed range of 2.84 V to 2.99 V over –40°C to 85°C. This value is factory-trimmed and specified in the Electrical Characteristics table of the SLVS292F datasheet. The TPS3836K33 uses an internal precision voltage divider to achieve this 3.3 V-compatible trip point without external components.

Does the TPS3836K33 require an external pullup resistor on the RESET pin?

No, the TPS3836K33 does not require an external pullup resistor because it features an active-low push-pull RESET output. Unlike open-drain variants such as the TPS3838K33DBVT, the TPS3836K33 actively drives both high and low states, enabling direct connection to MCU reset pins like those on the MSP430 without additional components.

How is the reset delay time selected on the TPS3836K33?

The reset delay time on the TPS3836K33 is selected by connecting the CT pin: to GND for a typical 10 ms delay, or to VDD for a typical 200 ms delay. No external capacitor is needed. This hardware-selectable timing eliminates firmware dependencies and ensures deterministic reset behavior even before MCU initialization.

What is the maximum supply voltage the TPS3836K33 can tolerate?

The TPS3836K33 has an absolute maximum VDD rating of 7 V, but its recommended operating range is 1.6 V to 6 V. For use with a 3.6 V lithium-ion battery, this provides 2.4 V headroom-sufficient to handle charging spikes or transient overshoot without damage, provided proper input filtering is implemented per TI layout guidelines.

Can the TPS3836K33 be used with microcontrollers other than MSP430?

Yes, the TPS3836K33 is compatible with any microcontroller or processor requiring an active-low reset signal with 3.3 V–compatible threshold and push-pull drive. It has been validated with MSP430 devices, but its electrical interface (2.93 V threshold, 10 µs propagation delay, 220 nA I_DD) meets standard reset requirements for ARM Cortex-M, PIC, and other low-power MCUs.

TPS3836K33DBVT Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Active

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

TPS3836K33DBVT FAQ

1.How can I place an order for TPS3836K33DBVT through Aetrix?

Please submit a Request for Quotation (RFQ) for TPS3836K33DBVT 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 TPS3836K33DBVT reliable?

The price and inventory of TPS3836K33DBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3836K33DBVT is usually 5 days.

3.What payment methods are accepted for TPS3836K33DBVT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3836K33DBVT transactions.

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4.How is shipping managed for TPS3836K33DBVT?

TPS3836K33DBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TPS3836K33DBVT 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 TPS3836K33DBVT?

For technical support, including TPS3836K33DBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3836K33DBVT requirements.

6.How does Aetrix verify that TPS3836K33DBVT is sourced from the original manufacturer or authorized distributors?

All TPS3836K33DBVT 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 TPS3836K33DBVT meets industry standards.

7.What is the process for return or replacement of TPS3836K33DBVT?

All TPS3836K33DBVT units undergo pre-shipment inspection (PSI). If there is an issue with TPS3836K33DBVT, 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 TPS3836K33DBVT part is unused and in its original packaging.

Return procedure for TPS3836K33DBVT:

1.Submit a request within 90 days.

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

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