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AP2127K-3.3TRG1-MS

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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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AP2127K-3.3TRG1-MS

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

AP2127K-3.3TRG1-MS 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 port; the datasheet gives an input voltage range of 1.2 V to 6 V, and a 1 uF or larger input capacitor should be placed close to VIN and GND.
2 GND power_in Ground pin; the input and output capacitor ground connections must return directly to this pin using short, wide traces.
3 EN input Enable control; pulling EN low puts the device into shutdown mode, with EN rising threshold 1.7 V and EN falling threshold 0.6 V.
4 NC unconnected Floating pin, no internal connection in the fixed-output variant.
5 VOUT power_out Power output port; rated for 600 mA output current with 1100 mA typical current limit, and requires an output capacitor of 1 uF to 22 uF effective with ESR above 1 mΩ placed close to VOUT and GND.

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 6 V 7
Output voltage accuracy -2 2 % ILOAD =0.1mA 7
Input voltage range (recommended) VIN 1.2 6 V 6
Application junction temperature range -40 125 oC 6
Application ambient temperature range -40 85 oC 6
VIN to GND maximum voltage VIN -0.3 7 V 6
VOUT, EN to GND maximum voltage VOUT, EN -0.3 6 V 6
VOUT to VIN maximum voltage VOUT -6 0.3 V 6
Junction temperature 150 oC 6
Storage temperature range -60 150 oC 6
Soldering temperature (10 sec) 260 oC Soldering, 10 sec. 6
ESD HBM 2 KV HBM 6
ESD MM 200 V MM 6
ESD CDM 2 KV CDM 6
Thermal resistance SOT-23-5 junction-to-ambient θJA 200 oC/W TA = 25°C, EVB board 6
Dropout voltage at 3V output VDROP_3V 0.32 V ILOAD =600mA; VOUT ≥ 3V 7
Quiescent current IQ 2 μA ILOAD = 0mA 7
Shutdown current ISD 0.01 0.5 μA VEN = 0V, VOUT = 0V 7
EN rising threshold VIH 1.7 V EN Rising 7
EN falling threshold VIL 0.6 V EN Falling 7
EN input current IEN 10 100 nA VEN = 5V 7
Input voltage regulation ΔLINE 0.2 % ILOAD =30mA, 1.5V ≤ VIN ≤ 5.5V or (VOUT + 0.2V) ≤ VIN ≤ 5.5V 7
Load voltage regulation ΔLOAD 0.2 % 10mA ≤ ILOAD ≤ 0.3A 7
Output current limit ILIM 600 mA VOUT =0V 7
Overtemperature shutdown temperature TSD 155 °C ILOAD =10mA 7
Overtemperature shutdown hysteresis ΔTSD 15 °C 7
Discharge resistance RDC 80 Ω EN = 0V, VOUT = 0.1V 7

CAD (KiCad official)

  • Symbol: AP2127K-3.3TRG1-MS
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5 (KiCad packages3D, STEP)
  • 3D model files: ap2127k-3-3trg1-ms-etched.step / ap2127k-3-3trg1-ms-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ap2127k-3-3trg1-ms.step / ap2127k-3-3trg1-ms.glb are the bare package body.

Provenance

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

  • Datasheet: MSKSEMI datasheet (13 pp, sha256 38487c22776c83fc, retrieved 2026-10-27, 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 off (skipped (clean text read)), 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