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AP2125K-1.8TRG1

Public Made by Adom

by adom

MSKSEMI Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-23-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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AP2125K-1.8TRG1

MSKSEMI · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-5

AP2125K-1.8TRG1 from MSKSEMI, in a SOT-23-5. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 VIN power_in Power input pin; the datasheet's recommended input voltage range is 1.2V to 5.5V, with a 1uF or larger input capacitor placed close to the VIN and GND pins.
2 GND power_in Ground pin; input and output capacitor ground connections must return to this pin using short, wide traces.
3 EN input Enable control; EN falling below 0.4V puts the device in shutdown (typical shutdown current 0.1µA), and EN must be at or above 1.0V (rising threshold) to enable the output.
4 NC unconnected Floating pin with no internal connection, to be left unconnected.
5 VOUT power_out Regulated output; use a ceramic output capacitor of 1uF to 22uF (ESR above 1mΩ) placed close to the VOUT and GND pins, with output current limited to 600mA (typical).

Key specifications

Parameter Value
Manufacturer MSKSEMI
Package SOT-23-5
Category Power Management (PMIC)
Pins 5

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Input voltage VIN 1.2 5.5 V 7
Output voltage accuracy -2 2 % ILOAD = 0.1mA 7
Output current limit ILIM 301 600 mA VOUT = 0V 7
Shutdown current ISD 0.1 0.5 μA VEN = 0V, VOUT = 0V 7
EN input current IEN 10 100 nA VEN = 5V 7
Input voltage (recommended operating) VIN 1.2 5.5 V 6
Application junction temperature range -40 125 °C 6
Application ambient temperature range -40 85 °C 6
VIN to GND -0.3 7 V 6
VOUT, EN to GND -0.3 6 V 6
VOUT to VIN -6 0.3 V 6
Soldering temperature 260 °C 10 sec. 6
Junction temperature (absolute maximum) 150 °C 6
Storage temperature range -60 150 °C 6
ESD HBM 2 KV 6
ESD MM 200 V 6
ESD CDM 2 KV 6

CAD (KiCad official)

  • Symbol: AP2125K-1.8TRG1
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5 (KiCad packages3D, STEP)
  • 3D model files: ap2125k-1-8trg1-etched.step / ap2125k-1-8trg1-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ap2125k-1-8trg1.step / ap2125k-1-8trg1.glb are the bare package body.

Provenance

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

  • Datasheet: MSKSEMI datasheet (14 pp, sha256 c28f07d50c0135a8, retrieved 2026-10-18, 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: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF