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LP3318B5F

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by Ray

LOWPOWER DC-DC Converters, SOT-23-5. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Datasheet

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Contents

README

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LP3318B5F

LOWPOWER · DC-DC Converters · SOT-23-5

LP3318B5F from LOWPOWER, 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 LX power_out Output switching node. Drain of the internal low-side N-Channel MOSFET (and high-side P-Channel MOSFET). Connect the inductor between VIN supply and LX to complete the step-up converter. Rated -0.3V to 45V absolute max.
2 GND power_in Device ground reference. Connect to system ground plane with low-impedance return.
3 FB input Regulation feedback input. Connect an external resistive divider from VOUT to FB (with R2 to GND) to program output voltage using VOUT = (R1/R2 + 1) x 1.23V. Feedback reference is 1.23V; input bias current ~50nA.
4 EN input Regulator on/off control input. A logic-high (VEN > 1.4V) enables the regulator; a logic-low (VEN < 0.4V) puts the LP3318 into low-current shutdown (<1uA). Do not leave floating.
5 VIN power_in Power supply input, 2.7V to 6V operating range (8V absolute max). Bypass to GND with a low-ESR ceramic capacitor (10uF typical) placed close to the pin.

Key specifications

Parameter Value
Manufacturer LOWPOWER
Package SOT-23-5
Category PMIC
Pins 5

Ordering variants

  • LP3318B5F

CAD (KiCad official)

  • Symbol: LP3318B5F
  • 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: LOWPOWER datasheet (6 pp, sha256 a1241dddb7a4c216, 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