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

Texas Instruments TPS3838K33DRVR

Name: TPS3838K33DRVR
Brand: Texas Instruments
SKU: TPS3838K33DRVR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TPS3838K33DRVR

Manufacturer:: Texas Instruments

Category:: Supervisors

Package:: 6-WDFN Exposed Pad

Datasheet:: TPS3838K33DRVR.pdf

Description:: IC SUPERVISOR 1 CHANNEL 6WSON

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Product details

Overview

TPS3838K33DRVR 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 microcontroller systems such as MSP430-based portable instrumentation.

For engineers reviewing the TPS3838K33DRVR datasheet, TPS3838K33DRVR pinout, TPS3838K33DRVR application, or TPS3838K33DRVR equivalent, key selection considerations include its open-drain output requiring external pullup, precise 2.93 V supervision level, ultra-low quiescent current, and WSON-6 package compatibility with space-constrained battery management circuits.

Technical Context

The TPS3838K33DRVR implements a precision bandgap-referenced comparator to monitor VDD against a fixed internal threshold (2.93 V ±50 mV), with hysteresis (40 mV) preventing chatter near trip point. Its reset assertion logic responds to both VDD falling below V_IT and manual reset (MR) activation, with propagation delays under 10 µs.

Delay timing is controlled solely by the CT pin: grounded for 10 ms nominal delay, tied to VDD for 200 ms nominal delay. The open-drain RESET output requires an external pullup resistor (value specified per operating voltage), enabling wired-OR configurations and flexible voltage-level interfacing with downstream logic.

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), ±50 mV tolerance - matches 3.3 V system undervoltage lockout at ~88.8% of nominal rail
Reset Delay Options	10 ms (CT = GND) or 200 ms (CT = VDD) - ensures stable power-up sequencing or brownout recovery before MCU release
Supply Current (I_DD)	220 nA (typical) at VDD > V_IT, <3 V - enables multi-year operation on coin-cell or small Li-ion batteries
Output Type	Active-low open-drain RESET - requires external pullup; allows level-shifting and shared reset bus with other open-drain devices
Operating Temperature	–40°C to +85°C - qualified for industrial and portable consumer environments
Hysteresis (V_HYS)	40 mV - prevents oscillation during slow-rising/falling supply transitions near threshold

Pinout & Package

TPS3838K33DRVR is housed in a 2.00 mm × 2.00 mm, 6-pin WSON (DRV) package with wettable flanks, optimized for automated optical inspection and high-density PCB layouts.

Pin/Terminal	Circuit Role	Design Meaning
VDD	Power input and monitored supply rail	Primary voltage source; device asserts RESET when VDD falls below 2.93 V
GND	Reference ground	Return path for internal comparator and output stage; must be low-impedance
CT	Delay configuration control	Connect to GND for 10 ms delay, to VDD for 200 ms delay; no external capacitor required
MR	Manual reset input (active-low)	Pull low to force immediate RESET assertion; tie to VDD if unused to minimize leakage
RESET	Open-drain active-low reset output	Sinks current when asserted; requires external pullup resistor (e.g., 10–100 kΩ) to host logic rail
N/C	No-connect terminal	Internally unconnected; left floating or grounded per layout best practice - no electrical function

Key Features

Feature	Design Value
Nano-power operation	220 nA typical I_DD extends battery life in always-on monitoring applications
Fixed 2.93 V threshold	Matches 3.3 V system requirements without trimming; ±50 mV tolerance ensures robust trip margin
Selectably timed reset delay	Hardware-configurable 10 ms / 200 ms delay eliminates need for external RC timing components
Open-drain RESET output	Enables wired-OR reset busing and interface with mixed-voltage logic domains
–40°C to +85°C operation	Validated performance across industrial temperature range without derating

Applications

Portable Medical Sensors	MSP430-Based Data Loggers
Use Scenario: Continuous monitoring of disposable wearable sensors powered by CR2032 coin cells. IC Role / Device Role / Timing Role: Voltage supervisor asserting RESET when battery drops below 2.93 V to prevent corrupted memory writes or sensor calibration drift. Use Value: 220 nA quiescent current enables >5-year shelf life; open-drain output interfaces directly with MSP430's internal pullup or external 3.3 V rail.	Use Scenario: Battery-backed environmental data logger sampling temperature/humidity every 10 minutes. IC Role / Device Role / Timing Role: Ensures clean MCU reset during Li-ion battery voltage sag (<2.93 V) caused by cold-temperature discharge or aging. Use Value: 200 ms delay (CT = VDD) prevents spurious resets during transient sags; hysteresis avoids chatter near threshold.
Wireless IoT End Nodes	Low-Power Industrial Controllers
Use Scenario: NB-IoT module sleeping >99% of time, waking only to transmit sensor data over cellular network. IC Role / Device Role / Timing Role: Supervises primary 3.6 V Li-ion supply and triggers hardware reset if voltage collapses during RF transmission burst. Use Value: 10 ms delay (CT = GND) provides fast recovery after brief brownouts; WSON-6 footprint minimizes PCB area in compact modules.	Use Scenario: Programmable logic controller (PLC) I/O module powered from isolated 3.3 V DC-DC converter. IC Role / Device Role / Timing Role: Monitors converter output and holds downstream FPGA in reset until stable 3.3 V is confirmed for ≥200 ms. Use Value: Fixed 2.93 V threshold aligns with industrial 3.3 V rail tolerances; –40°C to +85°C rating ensures reliability in factory environments.

Portable Medical Sensors

MSP430-Based Data Loggers

Use Scenario: Continuous monitoring of disposable wearable sensors powered by CR2032 coin cells.

IC Role / Device Role / Timing Role: Voltage supervisor asserting RESET when battery drops below 2.93 V to prevent corrupted memory writes or sensor calibration drift.

Use Value: 220 nA quiescent current enables >5-year shelf life; open-drain output interfaces directly with MSP430's internal pullup or external 3.3 V rail.

Use Scenario: Battery-backed environmental data logger sampling temperature/humidity every 10 minutes.

IC Role / Device Role / Timing Role: Ensures clean MCU reset during Li-ion battery voltage sag (<2.93 V) caused by cold-temperature discharge or aging.

Use Value: 200 ms delay (CT = VDD) prevents spurious resets during transient sags; hysteresis avoids chatter near threshold.

Wireless IoT End Nodes

Low-Power Industrial Controllers

Use Scenario: NB-IoT module sleeping >99% of time, waking only to transmit sensor data over cellular network.

IC Role / Device Role / Timing Role: Supervises primary 3.6 V Li-ion supply and triggers hardware reset if voltage collapses during RF transmission burst.

Use Value: 10 ms delay (CT = GND) provides fast recovery after brief brownouts; WSON-6 footprint minimizes PCB area in compact modules.

Use Scenario: Programmable logic controller (PLC) I/O module powered from isolated 3.3 V DC-DC converter.

IC Role / Device Role / Timing Role: Monitors converter output and holds downstream FPGA in reset until stable 3.3 V is confirmed for ≥200 ms.

Use Value: Fixed 2.93 V threshold aligns with industrial 3.3 V rail tolerances; –40°C to +85°C rating ensures reliability in factory environments.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TPS3836K33DBVR	SOT-23-5 package; push-pull active-low RESET; no external pullup required	Better suited for designs where board space permits larger SOT-23 and pullup resistor elimination is prioritized	Choose when minimizing BOM count outweighs footprint size; same threshold and delay options
TPS3838K33DBVR	SOT-23-5 package; open-drain active-low RESET; identical electrical specs but different package	Preferred where existing SOT-23 footprints exist and rework cost exceeds WSON adoption effort	Choose for drop-in replacement in legacy SOT-23 designs; verify thermal performance vs. WSON

Compared with TPS3836K33DBVR, TPS3838K33DRVR trades push-pull convenience for smaller WSON-6 size and better thermal resistance (R_θJA = 84.7°C/W vs. 153.6°C/W), while matching all supervision parameters; versus TPS3838K33DBVR, it offers identical functionality in a more compact, thermally efficient package.

Availability

TPS3838K33DRVR is available at Aetrix Electronics and suitable for portable medical sensors, MSP430-based data loggers, and wireless IoT end nodes requiring stable component supply with guaranteed long-term manufacturability.

Supply support for TPS3838K33DRVR 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 and precision analog IP.

The TPS383x family was designed specifically for ultra-low-power voltage supervision in battery-critical applications - emphasizing nanoscale quiescent current, fixed-precision thresholds, and minimal external component count.

FAQ

What is the exact reset threshold voltage of the TPS3838K33DRVR?

The TPS3838K33DRVR has a nominal reset threshold voltage (V_IT) of 2.93 V, with a guaranteed range of 2.84 V to 2.99 V across –40°C to +85°C. This value is factory-trimmed and fixed for the K33 variant, eliminating need for external resistor networks or calibration.

Does the TPS3838K33DRVR require an external pullup resistor on the RESET pin?

Yes, the TPS3838K33DRVR features an open-drain RESET output and requires an external pullup resistor. TI recommends values between 10 kΩ and 100 kΩ depending on host logic voltage and rise-time requirements; typical use cases employ 47 kΩ to 3.3 V.

How is the reset delay time selected on the TPS3838K33DRVR?

The reset delay time on the TPS3838K33DRVR is selected by the CT pin: connect CT to GND for a nominal 10 ms delay, or to VDD for a nominal 200 ms delay. No external capacitor is needed - timing is internally generated and factory-characterized.

What package type does the TPS3838K33DRVR use, and what are its dimensions?

The TPS3838K33DRVR uses the DRV package - a 2.00 mm × 2.00 mm, 6-pin WSON (Wettable Flank Small Outline No-Lead) package with 0.5 mm pitch. It is RoHS-compliant, halogen-free, and qualified for reflow per JEDEC J-STD-020.

Can the TPS3838K33DRVR monitor supplies below 1.8 V?

No - the TPS3838K33DRVR is specified for operation with supply voltages from 1.6 V to 6 V, but its internal 2.93 V threshold is fixed and not adjustable. For sub-1.8 V supervision, TI's TPS383xE18 (1.71 V threshold) or TPS3840 series would be appropriate alternatives.

TPS3838K33DRVR Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: -

Package/Case:: 6-WDFN Exposed Pad

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:: 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:: 6-WSON (2x2)

TPS3838K33DRVR FAQ

1.How can I place an order for TPS3838K33DRVR through Aetrix?

Please submit a Request for Quotation (RFQ) for TPS3838K33DRVR 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 TPS3838K33DRVR reliable?

The price and inventory of TPS3838K33DRVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3838K33DRVR is usually 5 days.

3.What payment methods are accepted for TPS3838K33DRVR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3838K33DRVR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TPS3838K33DRVR?

TPS3838K33DRVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TPS3838K33DRVR 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 TPS3838K33DRVR?

For technical support, including TPS3838K33DRVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3838K33DRVR requirements.

6.How does Aetrix verify that TPS3838K33DRVR is sourced from the original manufacturer or authorized distributors?

All TPS3838K33DRVR 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 TPS3838K33DRVR meets industry standards.

7.What is the process for return or replacement of TPS3838K33DRVR?

All TPS3838K33DRVR units undergo pre-shipment inspection (PSI). If there is an issue with TPS3838K33DRVR, 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 TPS3838K33DRVR part is unused and in its original packaging.

Return procedure for TPS3838K33DRVR:

1.Submit a request within 90 days.

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

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