Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Texas Instruments TPS3838K33DBVRG4

Name: TPS3838K33DBVRG4
Brand: Texas Instruments
SKU: TPS3838K33DBVRG4
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: TPS3838K33DBVRG4

Manufacturer:: Texas Instruments

Category:: Supervisors

Package:: SC-74A, SOT-753

Datasheet:: TPS3838K33DBVRG4.pdf

Description:: IC SUPERVISOR 1 CHANNEL SOT23-5

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:3,821

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

TPS3838K33DBVRG4 from Texas Instruments is a nano-power voltage supervisor IC with open-drain active-low RESET output, 2.93 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 lithium-ion battery-powered MSP430 microcontroller systems.

For engineers reviewing the TPS3838K33DBVRG4 datasheet, TPS3838K33DBVRG4 pinout, TPS3838K33DBVRG4 application, or TPS3838K33DBVRG4 equivalent, key selection considerations include its open-drain RESET output requiring an external pullup resistor, precise 2.93 V supervision level, ultra-low quiescent current, and compatibility with 1.6–6 V supply rails in space-constrained portable designs.

Technical Context

The TPS3838K33DBVRG4 implements a precision bandgap-based voltage comparator with 40 mV hysteresis (V_HYS) to prevent oscillation near threshold. Its internal timer initiates after V_DD exceeds V_IT + V_HYS, with delay time set by CT pin logic level: grounded for 10 ms, tied to V_DD for 200 ms.

It features manual reset (MR) with sub-μA input leakage, operates across –40°C to 85°C, and uses a 2-mm × 2-mm WSON-6 package optimized for low thermal resistance (R_θJA = 84.7°C/W). The open-drain RESET output supports flexible voltage-level translation and wired-OR configurations.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	1.6 V to 6 V - supports direct monitoring of Li-ion (3.6 V), 3.3 V, and 2.5 V rails without external regulation.
Threshold Voltage (V_IT)	2.93 V (typical) - precisely matches 3.3 V system undervoltage detection at ~10% dropout, with ±30 mV tolerance over temperature.
Supply Current (I_DD)	220 nA (typical) at V_DD > V_IT, < 3 V - enables multi-year battery life in always-on monitoring applications.
Reset Delay Options	10 ms (CT = GND) or 200 ms (CT = V_DD) - configurable timing ensures reliable MCU initialization after power stabilization.
Output Type	Active-low open-drain RESET - requires external pullup but allows level-shifting and shared reset bus with other devices.
Hysteresis (V_HYS)	40 mV - prevents false resets during slow-rising or noisy supply transitions near threshold.
Propagation Delay (t_PHL)	10 μs (max) - ensures fast fault response when V_DD drops below V_IT, critical for protecting volatile memory states.

Pinout & Package

TPS3838K33DBVRG4 is housed in a 2-mm × 2-mm, 6-pin WSON (DRV) package with wettable flanks, rated for –40°C to 85°C operation and compatible with standard reflow profiles (MSL Level-1).

Pin/Terminal	Circuit Role	Design Meaning
VDD	Power input	Monitored supply rail; device asserts RESET when voltage falls below 2.93 V.
GND	Ground reference	Return path for internal circuitry and reset timing capacitor discharge.
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 reset trigger; tie to VDD if unused to minimize leakage current.
RESET	Open-drain output	Drives low during fault; requires external pullup resistor (value specified per V_PULLUP and load).
N/C	No connect	Internally unconnected; must remain floating or grounded per layout guidelines.

Key Features

Feature	Design Value
Nano-power operation	220 nA typical I_DD enables >10-year battery life in coin-cell or Li-ion backup applications.
Selectably timed reset	Hardware-configurable 10 ms / 200 ms delay eliminates need for external RC timing components.
Open-drain RESET output	Supports mixed-voltage systems and wired-OR reset buses without level translators.
40 mV built-in hysteresis	Prevents chatter on noisy or slowly ramping supplies without external feedback components.
–40°C to 85°C operation	Validated performance across industrial temperature range without derating.

Applications

Battery-Powered MCU Supervision	Lithium-Ion Pack Monitoring
Use Scenario: Monitors 3.6 V Li-ion battery voltage feeding an MSP430 microcontroller in a wireless sensor node. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low RESET to hold MCU in reset until battery recovers above 2.93 V + 40 mV for ≥200 ms. Use Value: Prevents erratic MCU behavior during brownout, enabling clean restart only after stable power restoration.	Use Scenario: Integrated into portable medical device with single-cell Li-ion battery and low-power display controller. IC Role / Device Role / Timing Role: Detects end-of-discharge condition (<2.93 V) and triggers graceful shutdown sequence via open-drain RESET signal. Use Value: Extends usable battery capacity by avoiding premature cutoff while ensuring safe minimum operating voltage.
Industrial Data Logger	Smart Meter Power Sequencing
Use Scenario: Embedded in environmental data logger powered by primary alkaline cells with backup supercapacitor. IC Role / Device Role / Timing Role: Supervises main 3.3 V rail and asserts RESET on undervoltage, with MR pin used for firmware-initiated reset. Use Value: Guarantees deterministic boot state after power interruption, preserving flash write integrity during logging cycles.	Use Scenario: Used in utility smart meter to coordinate power-up sequencing between metrology ASIC and communication module. IC Role / Device Role / Timing Role: Generates synchronized 200 ms delayed RESET pulse after main 3.3 V rail stabilizes, ensuring proper initialization order. Use Value: Eliminates need for discrete RC network and reduces BOM count while maintaining precise timing control.

Battery-Powered MCU Supervision

Lithium-Ion Pack Monitoring

Use Scenario: Monitors 3.6 V Li-ion battery voltage feeding an MSP430 microcontroller in a wireless sensor node.

IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low RESET to hold MCU in reset until battery recovers above 2.93 V + 40 mV for ≥200 ms.

Use Value: Prevents erratic MCU behavior during brownout, enabling clean restart only after stable power restoration.

Use Scenario: Integrated into portable medical device with single-cell Li-ion battery and low-power display controller.

IC Role / Device Role / Timing Role: Detects end-of-discharge condition (<2.93 V) and triggers graceful shutdown sequence via open-drain RESET signal.

Use Value: Extends usable battery capacity by avoiding premature cutoff while ensuring safe minimum operating voltage.

Industrial Data Logger

Smart Meter Power Sequencing

Use Scenario: Embedded in environmental data logger powered by primary alkaline cells with backup supercapacitor.

IC Role / Device Role / Timing Role: Supervises main 3.3 V rail and asserts RESET on undervoltage, with MR pin used for firmware-initiated reset.

Use Value: Guarantees deterministic boot state after power interruption, preserving flash write integrity during logging cycles.

Use Scenario: Used in utility smart meter to coordinate power-up sequencing between metrology ASIC and communication module.

IC Role / Device Role / Timing Role: Generates synchronized 200 ms delayed RESET pulse after main 3.3 V rail stabilizes, ensuring proper initialization order.

Use Value: Eliminates need for discrete RC network and reduces BOM count while maintaining precise timing control.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TPS3836K33DBVR	Push-pull active-low RESET output; no external pullup required; same 2.93 V threshold and 220 nA I_DD.	Eliminates pullup resistor but lacks wired-OR capability; incompatible with mixed-voltage reset buses.	Select when board space is constrained and reset line drives only one load.
MAX6326UT33D3+	3.3 V fixed threshold, 1.6 μA I_DD, 140 ms fixed delay, SOT23-5 package; no CT pin or manual reset.	Higher quiescent current limits battery life; fixed delay removes timing flexibility; no MR pin for software-triggered reset.	Select only when lowest cost and minimal feature set are prioritized over nano-power and configurability.

Compared with TPS3836K33DBVR and MAX6326UT33D3+, the TPS3838K33DBVRG4 uniquely balances ultra-low power, hardware-selectable delay, manual reset, and open-drain flexibility - making it optimal for battery-critical, multi-rail, or field-upgradable systems where timing control and interface compatibility are essential.

Availability

TPS3838K33DBVRG4 is available at Aetrix Electronics and suitable for battery-powered microcontrollers, portable instrumentation, and low-power IoT edge nodes requiring stable component supply and long-term lifecycle support.

Supply support for TPS3838K33DBVRG4 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 high-reliability IC design.

The TPS383x family was engineered specifically for ultra-low-power voltage supervision in energy-constrained applications such as wearables, remote sensors, and battery-backed memory systems - emphasizing nanoscale current consumption and robust threshold accuracy.

FAQ

What is the exact threshold voltage of the TPS3838K33DBVRG4?

The TPS3838K33DBVRG4 has a nominal threshold voltage (V_IT) of 2.93 V, with guaranteed min/max values of 2.84 V and 2.99 V across –40°C to 85°C. This value is factory-trimmed and applies specifically to the K33 variant, confirmed in Section 7.6 of the SLVS292F datasheet.

Does the TPS3838K33DBVRG4 require an external pullup resistor on the RESET pin?

Yes, the TPS3838K33DBVRG4 uses an open-drain RESET output and requires an external pullup resistor. The recommended value depends on V_PULLUP and load capacitance; TI specifies 50 kΩ for 3.3 V systems in Recommended Operating Conditions (Section 7.4), ensuring valid logic-high levels while minimizing current draw.

How is the reset delay time selected on the TPS3838K33DBVRG4?

The reset delay time on the TPS3838K33DBVRG4 is selected via the CT pin: connecting CT to GND configures a 10 ms delay (typical), while connecting CT to V_DD selects 200 ms (typical). No external capacitor is needed - timing is internally generated and validated across temperature and voltage.

Can the TPS3838K33DBVRG4 operate from a 1.8 V supply?

No - the TPS3838K33DBVRG4 is a 3.3 V threshold variant designed for monitoring 3.3 V rails, but its supply voltage range is 1.6 V to 6 V. It can monitor lower rails (e.g., 1.8 V) only if configured as a dedicated supervisor for that rail using the appropriate variant (e.g., TPS3838E18), not the K33 part number.

What is the maximum allowable voltage on the VDD pin of the TPS3838K33DBVRG4?

The absolute maximum rating for VDD on the TPS3838K33DBVRG4 is 7 V (Section 7.1). Operation above 6 V is outside Recommended Operating Conditions and may impact reliability or parametric performance; sustained exposure to >7 V risks permanent damage per the Absolute Maximum Ratings table.

TPS3838K33DBVRG4 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:: 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

TPS3838K33DBVRG4 FAQ

1.How can I place an order for TPS3838K33DBVRG4 through Aetrix?

Please submit a Request for Quotation (RFQ) for TPS3838K33DBVRG4 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 TPS3838K33DBVRG4 reliable?

The price and inventory of TPS3838K33DBVRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3838K33DBVRG4 is usually 5 days.

3.What payment methods are accepted for TPS3838K33DBVRG4?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3838K33DBVRG4 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TPS3838K33DBVRG4?

TPS3838K33DBVRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TPS3838K33DBVRG4 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 TPS3838K33DBVRG4?

For technical support, including TPS3838K33DBVRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3838K33DBVRG4 requirements.

6.How does Aetrix verify that TPS3838K33DBVRG4 is sourced from the original manufacturer or authorized distributors?

All TPS3838K33DBVRG4 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 TPS3838K33DBVRG4 meets industry standards.

7.What is the process for return or replacement of TPS3838K33DBVRG4?

All TPS3838K33DBVRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS3838K33DBVRG4, 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 TPS3838K33DBVRG4 part is unused and in its original packaging.

Return procedure for TPS3838K33DBVRG4:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…