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TPS3820-50DBVR

Public Unreviewed

by Ray

Texas Instruments Supervisor and Reset ICs, SOT-23-5. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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TPS3820-50DBVR

Texas Instruments · Supervisor and Reset ICs · SOT-23-5

TPS3820-50DBVR from Texas Instruments, in a SOT-23-5. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 RESET output Active-low reset output, push-pull. Driven low while VDD is below the 4.55 V threshold (VIT-) and held low for the reset delay period (typ 200 ms) after VDD recovers, or during a manual/watchdog reset. VOL = 0.4 V max at IOL = 3 mA; VOH = VDD - 1.5 V at IOH = -120 uA.
2 GND power_in Ground reference for the device.
3 MR input Manual reset input, active low. Pulling MR low forces RESET low; RESET stays low as long as MR is low and for the reset delay after MR returns high. Internal ~52 kOhm pull-up to VDD; leave open or tie to VDD if unused. VIL <= 0.3 x VDD, VIH >= 0.7 x VDD.
4 WDI input Watchdog input. If WDI stays high or low longer than the watchdog timeout (typ 200 ms for TPS3820) a reset is triggered; a rising or falling edge on WDI clears the timer. Tie to high impedance if unused to avoid spurious resets. VIL <= 0.3 x VDD, VIH >= 0.7 x VDD.
5 VDD power_in Supply input and monitored voltage. Operating range 1.1 V to 5.5 V (absolute max 6 V); monitored against the fixed 4.55 V negative-going threshold for the -50 variant. Bypass with a 0.1 uF ceramic near the pin.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SOT-23-5
Category PMIC
Pins 5

Ordering variants

Same part, different packaging or reel option.

  • TPS3820-50DBVR
  • TPS3820-50DBVRDBVT

CAD (KiCad official)

  • Symbol: TPS3820-50DBVR
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5 (KiCad packages3D, STEP)

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Texas Instruments datasheet (35 pp, sha256 f0ddd0a85e54c699, retrieved 2026-08-17, tier: lcsc)
  • Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
  • Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF