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Texas Instruments TPS3840DL27DBVR — Power Management (PMIC / Gate Driver)

TI TPS3840DL27DBVR Power Supply Monitor, 2.7 V Threshold

MPNTPS3840DL27DBVR
Active

Texas Instruments TPS3840DL27DBVR power supply monitor, 2.7 V threshold, active-low open-drain output, 619 ms typical reset timeout, -40°C to 125°C junction temperature, SOT-23-5 package.

$0.9100Ref. price · indicative, final on quote
Texas Instruments TPS3840DL27DBVR datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

TPS3840DL27DBVR specifications
ParameterValue
TypePower Supply Monitor
MountingSurface Mount
Voltage - threshold2.7V
Number of voltages monitored1
Operating temperature-40°C~125°C(TJ)
ResetActive Low
OutputOpen Drain or Open Collector
PackageTape & Reel (TR); Cut Tape (CT)
Reset timeout619ms Typical
CaseSC-74A, SOT-753

Product details

The TPS3840DL27DBVR is a single-channel power supply monitor from Texas Instruments that asserts a reset when the monitored voltage drops below 2.7 V. The output is active-low open-drain.

619 ms timeout — long enough for the rail to settle

The reset timeout is 619 ms typical. That window gives the bulk decoupling capacitors on the rail time to charge to the regulated voltage before the processor is released from reset. If the downstream device needs a shorter or longer delay, this part is fixed — no external capacitor to trim it — so the 619 ms figure is a design-in parameter, not a tuning option.

Temperature range and package — industrial and automotive capable

Frequently asked questions

What is the exact reset threshold voltage of TPS3840DL27DBVR?

The reset threshold voltage is 2.7 V. The monitor asserts reset when the supply drops below that level and releases it after the 619 ms timeout once the voltage rises above the threshold.

What is the typical reset timeout for TPS3840DL27DBVR?

The typical reset timeout is 619 ms. This is a fixed delay — no external capacitor is needed to set it.

Is TPS3840DL27DBVR active low or active high?

The reset output is active low. The open-drain output pulls low when the supply is below the threshold and goes high-impedance (released) after the timeout when the supply recovers.