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MD8338A

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Shanghai Mingda Microelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-89-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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MD8338A

Shanghai Mingda Microelectronics · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89-3

MD8338A from Shanghai Mingda Microelectronics, in a SOT-89-3. 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 reference pin; the datasheet gives GND current of 1 µA typical and 2.5 µA maximum at no load for 3.0 V ≤ VOUT(S) ≤ 5.3 V.
2 VIN power_in Input supply pin; the rated input voltage is 2.2 V to 40 V, and the absolute maximum input voltage is -0.3 V to 45 V.
3 VOUT power_out Regulated output pin rated for up to 300 mA, which must not be driven above VIN + 0.3 V because of reverse current through the parasitic diodes.

Key specifications

Parameter Value
Manufacturer Shanghai Mingda Microelectronics
Package SOT-89-3
Category Power Management (PMIC)
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
Output Voltage (3.8V variant, VOUT(S)=3.8V) VOUT(S) 0.98 1.02 ×VOUT(S) VIN= VOUT(S)+2V, IOUT=10mA 3
Temperature Stability ΔVOUT/(VOUT·ΔT) -50 50 ppm/℃ VIN = VOUT(S)+2V, IOUT=10mA, -40℃≤Ta≤125℃ 3
Line Regulation ΔVOUT/(VOUT·ΔVIN) 0.01 0.02 %/V VOUT(S)+2V≤VIN≤40V, IOUT =1mA 3
Load Regulation VOUT2 20 40 mV VIN=VOUT(S)+2V, 1mA≤IOUT≤300mA, VOUT(S)≤5.3V 3
Dropout Voltage (printed for VOUT(S)=3.3V) VDROP 4 8 mV VOUT(S)=3.3V IOUT=1mA 3
Dropout Voltage (printed for VOUT(S)=3.3V) VDROP 1300 1950 mV VOUT(S)=3.3V IOUT=300mA 3
GND Current IGND 1 1.5 2.5 uA no load, 3.0≤VOUT(S)≤5.3V 3
Input Voltage VIN 2.2 40 V 3
Maximum Output Current IOUTMAX 300 350 mA 3
Current Limit ILIM 350 550 mA VIN= VOUT(S)+2V, VOUT = 0.95×VOUT(S) 3
Input Voltage (absolute maximum) VIN -0.3 45 V 2
Power Dissipation (SOT89-3) PD 1000 mW 2
Thermal Resistance Junction-to-Board (SOT89-3) RθJB 100 ℃/W Mounted on JEDEC standard 4layer (2s2p) PCB test board 2
Operating Ambient Temperature Topr -40 85 ℃ 2
Storage Temperature Tstg -40 125 ℃ 2
ESD Protection ESD HBM 1500 V HBM 2

CAD (KiCad official)

  • Symbol: MD8338A
  • Footprint: Package_TO_SOT_SMD:SOT-89-3
  • 3D model: SOT-89-3 (KiCad packages3D, STEP)
  • 3D model files: md8338a-etched.step / md8338a-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); md8338a.step / md8338a.glb are the bare package body.

Provenance

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

  • Datasheet: Shanghai Mingda Microelectronics datasheet (10 pp, sha256 b90bf74c0495d786, retrieved 2026-10-19, 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