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MX1112AS

Public Made by Adom

by adom

Wuxi Maxinmicro AC-DC Controllers And Regulators, SOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentpower management (pmic)mx1112asfactory-2.0.0extractor-text
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Contents

README

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MX1112AS

Wuxi Maxinmicro · AC-DC Controllers And Regulators · SOP-8

MX1112AS from Wuxi Maxinmicro, in a SOP-8. 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 VDD power_in Power supply pin; the recommended VDD supply range is 9-24V, the absolute maximum VDD voltage is 30V, and the device has UVLO between 7.0-9.0V (on) and 16.2-17.8V (off).
2 GND power_in Ground pin.
3 FB input Input and output voltage are sensed from the auxiliary winding through a resistor divider; the FB input voltage is rated -0.3 to 7V and the feedback reference Vref_FB is 2.475-2.525V.
4 CS input Current sense pin, with a sense resistor to ground used for cycle-by-cycle current limiting; the CS input voltage is rated -0.3 to 7V and the over current protection threshold is 485-515mV.
5 Drain passive Drain of the internal power MOSFET, which connects to the primary winding of the transformer; the drain off-state voltage is 650V.
6 Drain passive Drain of the internal power MOSFET, which connects to the primary winding of the transformer; the drain off-state voltage is 650V.
7 Drain passive Drain of the internal power MOSFET, which connects to the primary winding of the transformer; the drain off-state voltage is 650V.
8 Drain passive Drain of the internal power MOSFET, which connects to the primary winding of the transformer; the drain off-state voltage is 650V.

Key specifications

Parameter Value
Manufacturer Wuxi Maxinmicro
Package SOP-8
Category Power Management (PMIC)
Pins 8

Electrical characteristics

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

Parameter Symbol Min Typ Max Unit Conditions Page
UVLO exit threshold (VDD under voltage lockout exit) UVLO_OFF 16.2 17 17.8 V TA=25℃, VDD=19V unless noted 4
VDD under voltage lockout enter UVLO_ON 7 8 9 V TA=25℃, VDD=19V unless noted 4
Over voltage protection voltage V_OVP 25 27 29 V TA=25℃, VDD=19V unless noted 4
Reference voltage for FB threshold Vref_FB 2.475 2.5 2.525 V TA=25℃, VDD=19V unless noted 4
Minimum frequency FOSC_MIN 400 445 490 Hz TA=25℃, VDD=19V unless noted 4
Maximum cable compensation current I_CABLE 44 48 52 μA TA=25℃, VDD=19V unless noted 4
Over current protection threshold VCS 485 500 515 mV TA=25℃, VDD=19V unless noted 4
VDD normal operation current I_VDD 0.65 1 mA TA=25℃, VDD=19V unless noted 4
VDD startup current I startup 5 20 μA VDD=UVLO_OFF-1V; TA=25℃, VDD=19V unless noted 4
Maximum VDD voltage VDD_MAX 25 V TA=25℃, VDD=19V unless noted 4
Minimum off time TOFF_MIN 2 μs TA=25℃, VDD=19V unless noted 4
Maximum frequency FOSC_MAX 72 kHz TA=25℃, VDD=19V unless noted 4
Maximum over current threshold VCS_MAX 590 mV TA=25℃, VDD=19V unless noted 4
Over current threshold at light load VCS_MIN 170 mV TA=25℃, VDD=19V unless noted 4
Drain to Source breakdown voltage VDS 650 V TA=25℃, VDD=19V unless noted 4
Static Drain to Source on resistance RDS_ON 3.5 4.1 Ω TA=25℃, VDD=19V unless noted 4
Internal over temperature protection threshold OTP_in 145 ℃ TA=25℃, VDD=19V unless noted 4
Leading edge blanking time T_LEB 300 ns TA=25℃, VDD=19V unless noted 4
OCP propagation delay time Td_OCP 100 ns TA=25℃, VDD=19V unless noted 4
Drain Voltage (off state) 650 2
VDD Voltage VDD 30 V 2
FB Input Voltage -0.3 7 V 2
CS Input Voltage -0.3 7 V 2
Operating Junction Temperature TJ -40 150 ℃ 2
Storage Temperature TSTG -55 150 ℃ 2
ESD (HBM) -2 2 kV 2
Lead Temperature (Soldering) 260 ℃ Soldering, 10 secs 2
VDD supply voltage VDD 9 24 V 2
Power dissipation PD 1.1 W TA=25℃ 2
Output power 13 W Charger or adapter full AC input 2
Package thermal resistance, junction to ambient (SOP8) RθJA 90 ℃/W Drain pin connected to 200mm2 PCB copper clad 2

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part Material Colour / plating Datasheet says Page
contacts copper Note: Drain Pin Connected to 200mm2 PCB copper clad. 2

CAD (KiCad official)

  • Symbol: MX1112AS
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOP-8 (KiCad packages3D, STEP)
  • 3D model files: mx1112as-etched.step / mx1112as-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mx1112as.step / mx1112as.glb are the bare package body.

Provenance

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

  • Datasheet: Wuxi Maxinmicro datasheet (10 pp, sha256 3f26972f96a3e7f6, retrieved 2026-10-26, tier: lcsc)
  • 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