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AP2125N-3.0TRG1

Public Made by Adom

by adom

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

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AP2125N-3.0TRG1

MSKSEMI · Linear Voltage Regulators (LDO) · SOT-23

AP2125N-3.0TRG1 from MSKSEMI, in a SOT-23. 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 GND power_in Ground pin; input and output capacitor grounds must return to this pin with short, thick traces.
2 VOUT power_out Regulated 3.0V output (±2% accuracy) delivering up to 300mA, with a 1uF to 22uF output capacitor placed close to this pin.
3 VIN power_in Power input accepting 1.2V to 5.5V (absolute maximum 7V), with a 1uF or larger input capacitor placed close to this pin.

Key specifications

Parameter Value
Manufacturer MSKSEMI
Package SOT-23
Category Power Management
Pins 3

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
SNS input current ISNS 0.5 μA SNS = VOUT 7
Quiescent current IQ 2 μA ILOAD = 0mA 7
Shutdown current ISD 0.1 0.5 μA VEN = 0V, VOUT = 0V 7
EN input current IEN 10 100 nA VEN = 5V 7
Output current limit ILIM 301 600 mA VOUT = 0V 7
Line regulation ΔLINE 0.2 % ILOAD =30mA, 1.5V ≤ VIN ≤ 5.5V or (VOUT + 0.2V) ≤ VIN ≤ 5.5V 7
Load regulation ΔLOAD 0.2 % 10mA ≤ ILOAD ≤ 0.3A 7
EN threshold rising VIH 1 V EN Rising 7
EN threshold falling VIL 0.4 V EN Falling 7
Dropout voltage VDROP_3V 0.18 V ILOAD =300mA, VOUT ≥ 3V 7
Thermal shutdown temperature TSD 155 °C ILOAD =10mA 7
Thermal shutdown hysteresis ΔTSD 15 °C 7
Discharge resistance RDC 30 Ω EN = 0V , VOUT = 0.1V 7
PSRR PSRR 80 dB ILOAD =5mA, VOUT =1.2V, VIN = 2V, f = 100Hz 7
PSRR PSRR 75 dB ILOAD =5mA, VOUT =1.2V, VIN = 2V, f = 1kHz 7
Output noise 120 μVRMS BW = 10Hz to 100kHz, COUT =1μF, VIN = 3.5V, ILOAD =0.1A, VOUT =2.8V 7
VIN to GND VIN -0.3 7 V 6
VOUT, EN to GND VOUT, EN -0.3 6 V 6
VOUT to VIN -6 0.3 V 6
Junction temperature TJ 150 °C 6
Storage temperature -60 150 °C 6
Lead soldering temperature 260 °C Soldering, 10 sec. 6
Thermal resistance junction to ambient θJA 250 °C/W TA = 25°C, EVB board 6
Recommended input voltage VIN 1.2 5.5 V 6
Operating junction temperature TJ -40 125 °C 6
Operating ambient temperature TA -40 85 °C 6

CAD (KiCad official)

  • Symbol: AP2125N-3.0TRG1
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: ap2125n-3-0trg1-etched.step / ap2125n-3-0trg1-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ap2125n-3-0trg1.step / ap2125n-3-0trg1.glb are the bare package body.

Provenance

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

  • Datasheet: MSKSEMI datasheet (13 pp, sha256 38b8599b7551d689, retrieved 2026-10-22, 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-sonnet-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