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

Texas Instruments TPS3838L30DBVTG4

Name: TPS3838L30DBVTG4
Brand: Texas Instruments
SKU: TPS3838L30DBVTG4
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TPS3838L30DBVTG4

Manufacturer:: Texas Instruments

Category:: Supervisors

Package:: SC-74A, SOT-753

Datasheet:: TPS3838L30DBVTG4.pdf

Description:: IC SUPERVISOR 1 CHANNEL SOT23-5

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Product details

Overview

TPS3838L30DBVTG4 from Texas Instruments is a nano-power voltage supervisor IC with active-low open-drain RESET output, 2.64 V threshold voltage (V_IT), 220 nA typical supply current, and selectable 10 ms or 200 ms reset delay via CT pin - used for undervoltage monitoring in battery-powered microcontroller systems such as MSP430-based portable instrumentation.

For engineers reviewing the TPS3838L30DBVTG4 datasheet, TPS3838L30DBVTG4 pinout, TPS3838L30DBVTG4 application, or TPS3838L30DBVTG4 equivalent, key selection criteria include its open-drain RESET interface requiring external pullup, precise 2.64 V supervision level, ultra-low quiescent current, and compatibility with 1.6–6 V supply rails in space-constrained SOT-23-5 layouts.

Technical Context

The TPS3838L30DBVTG4 implements a precision bandgap-referenced comparator to monitor VDD against a fixed 2.64 V threshold (V_IT) with 40 mV hysteresis (V_HYS). Its internal timer initiates reset assertion only after VDD rises above V_IT + V_HYS, then enforces a user-selectable delay (10 ms or 200 ms) before deasserting RESET.

Manual reset (MR) provides asynchronous low-active control independent of VDD, with propagation delay under 0.3 µs. The open-drain RESET output requires an external pullup resistor and supports wired-OR configurations - distinct from push-pull variants TPS3836/TPS3837.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	1.6 V to 6 V - supports single-cell Li-ion (3.6 V), 3.3 V logic, and 2.5 V/1.8 V low-power domains without external regulation.
Threshold Voltage (V_IT)	2.64 V (typical) - precisely monitors 3.0 V nominal rails with ±3% tolerance over –40°C to 85°C, enabling reliable brownout detection.
Supply Current (I_DD)	220 nA (typical) at VDD > V_IT, VDD < 3 V - extends battery life in always-on supervisory applications beyond 10 years on a CR2032 cell.
Reset Delay Options	10 ms (CT = GND) or 200 ms (CT = VDD) - configurable timing ensures stable power-up sequencing for MCUs with varying initialization requirements.
Output Type	Active-low open-drain - enables shared reset bus with multiple devices and flexible voltage-level translation via external pullup.
Hysteresis (V_HYS)	40 mV - prevents oscillatory reset toggling during slow-rising or noisy supply transitions near threshold.
Propagation Delay (t_PHL)	10 µs (max) - guarantees fast fault response to sudden VDD collapse, critical for data retention and safe shutdown.

Pinout & Package

TPS3838L30DBVTG4 is housed in a 5-pin SOT-23 (DBV) package measuring 2.90 mm × 1.60 mm, optimized for high-density PCB layouts in portable electronics.

Pin/Terminal	Circuit Role	Design Meaning
VDD	Power input	Monitored supply rail; device operates and asserts reset when voltage falls below 2.64 V.
GND	Ground reference	Analog and digital ground return; must be low-impedance to ensure accurate threshold sensing.
CT	Delay 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 trigger; pulls RESET low immediately when asserted, overriding VDD status.
RESET	Open-drain output	Active-low signal requiring external pullup; sinks current during fault, floats high otherwise.

Key Features

Feature	Design Value
Nano-power operation	220 nA typical I_DD enables multi-year battery life in maintenance-free IoT sensors and wearables.
Fixed 2.64 V threshold	Matches 3.0 V system rails with tight tolerance, eliminating need for external resistive dividers or trimming.
Selectably timed reset	10 ms / 200 ms delay options support both fast-boot MCUs and systems requiring extended stabilization periods.
Open-drain RESET	Allows wired-OR reset busing across multiple supervisors and level-shifting to higher-voltage logic domains.
–40°C to 85°C operation	Validated performance across industrial temperature range, suitable for automotive cabin electronics and outdoor equipment.

Applications

Portable Medical Sensors	MSP430-Based Data Loggers
Use Scenario: Continuous glucose monitor powered by coin-cell battery, requiring reliable power-fail detection during sensor calibration. IC Role / Device Role / Timing Role: Voltage supervisor asserting open-drain RESET to halt ADC sampling and preserve SRAM when battery drops below 2.64 V. Use Value: 220 nA quiescent current extends operational life beyond 3 years; 200 ms delay prevents false resets during transient load spikes.	Use Scenario: Environmental data logger using MSP430FR5969, capturing temperature/humidity every 5 minutes with flash write persistence. IC Role / Device Role / Timing Role: TPS3838L30DBVTG4 monitors 3.0 V LDO output and triggers hardware reset if supply sags during flash programming. Use Value: Open-drain output interfaces directly with MSP430's RST/NMI pin; 40 mV hysteresis avoids chatter during marginal supply conditions.
Lithium-Ion Battery Protection	Low-Power Wireless Transceivers
Use Scenario: Smart smoke detector with Li-ion backup, needing undervoltage lockout before battery reaches unsafe discharge levels. IC Role / Device Role / Timing Role: Supervises 3.6 V battery pack; asserts RESET to disable RF module and enter deep sleep when voltage crosses 2.64 V threshold. Use Value: 2.64 V V_IT aligns with 2.5 V minimum safe cutoff for Li-ion cells; 10 ms delay enables graceful firmware save before shutdown.	Use Scenario: BLE beacon operating on AA batteries, requiring deterministic reset behavior during cold-start and voltage recovery. IC Role / Device Role / Timing Role: Provides power-on reset and brownout detection for nRF52832 MCU, with MR tied to button for user-initiated reboot. Use Value: Manual reset input allows field service recovery without battery removal; SOT-23-5 footprint minimizes board area in compact enclosures.

Portable Medical Sensors

MSP430-Based Data Loggers

Use Scenario: Continuous glucose monitor powered by coin-cell battery, requiring reliable power-fail detection during sensor calibration.

IC Role / Device Role / Timing Role: Voltage supervisor asserting open-drain RESET to halt ADC sampling and preserve SRAM when battery drops below 2.64 V.

Use Value: 220 nA quiescent current extends operational life beyond 3 years; 200 ms delay prevents false resets during transient load spikes.

Use Scenario: Environmental data logger using MSP430FR5969, capturing temperature/humidity every 5 minutes with flash write persistence.

IC Role / Device Role / Timing Role: TPS3838L30DBVTG4 monitors 3.0 V LDO output and triggers hardware reset if supply sags during flash programming.

Use Value: Open-drain output interfaces directly with MSP430's RST/NMI pin; 40 mV hysteresis avoids chatter during marginal supply conditions.

Lithium-Ion Battery Protection

Low-Power Wireless Transceivers

Use Scenario: Smart smoke detector with Li-ion backup, needing undervoltage lockout before battery reaches unsafe discharge levels.

IC Role / Device Role / Timing Role: Supervises 3.6 V battery pack; asserts RESET to disable RF module and enter deep sleep when voltage crosses 2.64 V threshold.

Use Value: 2.64 V V_IT aligns with 2.5 V minimum safe cutoff for Li-ion cells; 10 ms delay enables graceful firmware save before shutdown.

Use Scenario: BLE beacon operating on AA batteries, requiring deterministic reset behavior during cold-start and voltage recovery.

IC Role / Device Role / Timing Role: Provides power-on reset and brownout detection for nRF52832 MCU, with MR tied to button for user-initiated reboot.

Use Value: Manual reset input allows field service recovery without battery removal; SOT-23-5 footprint minimizes board area in compact enclosures.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TPS3836L30DBVT	Push-pull active-low RESET output; no external pullup required; identical V_IT (2.64 V) and delay options.	Eliminates pullup resistor but lacks wired-OR capability; unsuitable for shared reset buses.	Select when board layout prioritizes component count reduction over bus flexibility.
MAX6326LT31D2T	3.09 V threshold, 1.6 µA I_DD, fixed 200 ms delay, SOT-23-5 package.	Higher threshold and quiescent current; not drop-in compatible due to different V_IT and timing.	Consider only if 3.09 V trip point matches system requirements and 1.6 µA I_DD is acceptable.

Compared with TPS3838L30DBVTG4, TPS3836L30DBVT simplifies BOM by removing the pullup resistor but sacrifices bus-sharing capability, while MAX6326LT31D2T offers tighter delay accuracy at the cost of higher power and mismatched threshold - making TPS3838L30DBVTG4 optimal for ultra-low-power, multi-device reset coordination.

Availability

TPS3838L30DBVTG4 is available at Aetrix Electronics and suitable for portable medical sensors, MSP430-based data loggers, lithium-ion battery protection circuits requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for TPS3838L30DBVTG4 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 designed specifically for ultra-low-power voltage supervision in battery-critical applications - delivering nanoscale current draw, factory-trimmed thresholds, and flexible reset timing without compromising reliability.

FAQ

What is the exact threshold voltage of the TPS3838L30DBVTG4?

The TPS3838L30DBVTG4 has a nominal threshold voltage (V_IT) of 2.64 V, with a guaranteed range of 2.56 V to 2.69 V over –40°C to 85°C. This value is factory-trimmed and applies specifically to the 'L30' variant, distinguishing it from other members of the TPS383x family such as TPS3838K33 (2.93 V) or TPS3838H30 (2.79 V).

Does the TPS3838L30DBVTG4 require an external pullup resistor on the RESET pin?

Yes, the TPS3838L30DBVTG4 features an open-drain RESET output and requires an external pullup resistor. The recommended value is specified in the datasheet's Recommended Operating Conditions table and depends on the target logic-high voltage level and acceptable rise time; typical values range from 10 kΩ to 100 kΩ for 3.3 V systems.

How is the reset delay time selected on the TPS3838L30DBVTG4?

The reset delay time on the TPS3838L30DBVTG4 is selected via the CT pin: connect CT to GND for a typical 10 ms delay, or to VDD for a typical 200 ms delay. No external capacitor is needed - the timing is internally generated and calibrated, ensuring consistent behavior across temperature and process variation.

Can the TPS3838L30DBVTG4 operate from a 1.8 V supply?

No, the TPS3838L30DBVTG4 is not rated for reliable operation at 1.8 V. Its minimum recommended supply voltage is 1.6 V, but the 2.64 V threshold means it will assert RESET continuously below that level. For 1.8 V systems, the TPS3838E18 variant (1.71 V threshold) is the appropriate choice within the same family.

What is the maximum supply voltage rating for the TPS3838L30DBVTG4?

The TPS3838L30DBVTG4 has an absolute maximum supply voltage (VDD) rating of 7 V. However, the recommended operating range is 1.6 V to 6 V. Exceeding 6 V risks violating functional specifications and may accelerate parametric drift or reduce long-term reliability, even if within absolute maximum limits.

TPS3838L30DBVTG4 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:: 2.64V

Output:: Open Drain or Open Collector

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

TPS3838L30DBVTG4 FAQ

1.How can I place an order for TPS3838L30DBVTG4 through Aetrix?

Please submit a Request for Quotation (RFQ) for TPS3838L30DBVTG4 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 TPS3838L30DBVTG4 reliable?

The price and inventory of TPS3838L30DBVTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3838L30DBVTG4 is usually 5 days.

3.What payment methods are accepted for TPS3838L30DBVTG4?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3838L30DBVTG4 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TPS3838L30DBVTG4?

TPS3838L30DBVTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TPS3838L30DBVTG4 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 TPS3838L30DBVTG4?

For technical support, including TPS3838L30DBVTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3838L30DBVTG4 requirements.

6.How does Aetrix verify that TPS3838L30DBVTG4 is sourced from the original manufacturer or authorized distributors?

All TPS3838L30DBVTG4 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 TPS3838L30DBVTG4 meets industry standards.

7.What is the process for return or replacement of TPS3838L30DBVTG4?

All TPS3838L30DBVTG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS3838L30DBVTG4, 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 TPS3838L30DBVTG4 part is unused and in its original packaging.

Return procedure for TPS3838L30DBVTG4:

1.Submit a request within 90 days.

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

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