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Texas Instruments TPS3840PL31DBVR — Power Management (PMIC / Gate Driver)

TPS3840PL31DBVR – Simple Reset/Power-On Reset IC

MPNTPS3840PL31DBVR
Active

Texas Instruments, Simple Reset/Power-On Reset, TPS3840PL31DBVR, 3.1V threshold, active low push-pull output, 619 ms typical reset timeout, -40°C to 125°C, SOT-23-5, active production.

$0.8700Ref. price · indicative, final on quote
Texas Instruments TPS3840PL31DBVR datasheet (PDF)
PackagingSC-74A, SOT-753
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

TPS3840PL31DBVR specifications
ParameterValue
TypeSimple Reset/Power-On Reset
MountingSurface Mount
Voltage - threshold3.1V
Number of voltages monitored1
Operating temperature-40°C ~ 125°C (TJ)
ResetActive Low
OutputPush-Pull, Totem Pole
PackageTape & Reel (TR) Cut Tape (CT)
Reset timeout619ms Typical
CaseSC-74A, SOT-753

Product details

Reset supervisor for a 3.1V rail

The TPS3840PL31DBVR is a simple reset/power-on reset IC from Texas Instruments that monitors a single 3.1V supply rail and asserts an active-low reset signal when the voltage drops below that threshold. The output is push-pull, totem pole — it drives the reset line high or low without needing an external pull-up resistor, which saves a component on the BOM. With a typical reset timeout of 619 ms, the part holds the system in reset long enough for the supply to stabilise after power-up, covering most MCU and FPGA power-on sequences.

Threshold and timing for the BOM

The 3.1V threshold is set internally — no external resistor divider needed. That simplifies the layout and removes a tolerance stack from the trip point. The 619 ms timeout is a typical value; the datasheet min/max bounds determine the worst-case hold time for the downstream processor. Budget the minimum timeout when calculating the power-good window.

Frequently asked questions

Is the TPS3840PL31DBVR available in a push-pull output?

Yes, the output is push-pull, totem pole — it drives the reset line high or low without an external pull-up resistor.

What is the reset timeout period for the TPS3840PL31DBVR?

The typical reset timeout is 619 ms.

Does the TPS3840PL31DBVR have a functional equivalent or replacement?

The TLV803EA29VDBZR is a similar simple reset IC with an active-low output, but it uses an open-drain output (requires a pull-up) and has a shorter minimum reset timeout of 130 ms. The TPS3840PL31DBVR's push-pull output and 619 ms timeout are distinct differences to evaluate for your design.