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ETA1621S2G

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by Ray

etasolution DC-DC Converters, SOT-23-6. Datasheet-verified pinout, KiCad symbol/footprint/3D.

componentpmiceta1621s2g
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3D Model

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Symbol & Footprint

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Datasheet

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Contents

README

markdown

ETA1621S2G

etasolution · DC-DC Converters · SOT-23-6

ETA1621S2G from etasolution, in a SOT-23-6. 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 SW power_out Switching node / inductor connection. Connect an inductor between SW and IN. Internally connected to the drain of the integrated 20V/2.8A NMOS power switch; absolute max 22V, current limit 2.8A typ.
2 GND power_in Ground pin. Source return for the internal NMOS power switch and reference for the feedback divider.
3 FB input Feedback input. Connect an external resistor divider from the output to FB and GND to set VOUT. Regulated to 600 mV typical (582-618 mV); FB input current is 50 nA max. Vout = (R1+R2)/R2 x 0.6V.
4 EN input Multi-functional enable / PWM-dimming control pin. Logic high (>=1.2V) enables the IC; logic low (<=0.6V) disables. Accepts a 25-100 kHz PWM signal to reduce the FB regulation voltage (VFB = Duty x 600 mV) for output voltage programming or LED dimming. Must not be left floating.
5 IN power_in Input supply pin. Operating range 2.5-6V (absolute max 6V). Bypass with a 4.7 uF or larger ceramic capacitor to GND. UVLO rising threshold 2.15V typ with 140 mV hysteresis.
6 NC unconnected Not connected. Leave this pin floating.

Key specifications

Parameter Value
Manufacturer etasolution
Package SOT-23-6
Category PMIC
Pins 6

Ordering variants

Same part, different packaging or reel option.

  • ETA1621S2G

CAD (KiCad official)

  • Symbol: ETA1621S2G
  • Footprint: Package_TO_SOT_SMD:SOT-23-6
  • 3D model: SOT-23-6 (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: etasolution datasheet (5 pp, sha256 6bf258b81cfecc46, retrieved 2026-08-17, tier: lcsc)
  • 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