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MS78L33

Public Made by Adom

by adom

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

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MS78L33

MSKSEMI · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89

MS78L33 from MSKSEMI, in a SOT-89. 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 VO power_out Regulated 3.3V output, with a 0.1µF output capacitor (CO) to ground in the typical application circuit; internal short-circuit current limiting, maximum output current 100 mA.
2 GND power_in Ground reference for the regulator, common to the input and output capacitors in the application circuit.
3 VI power_in Unregulated input voltage with a 0.33µF input capacitor (CI) to ground; absolute maximum 30 V for 3.3V-9V versions, and the dropout voltage is 1.7 V maximum.

Key specifications

Parameter Value
Manufacturer MSKSEMI
Package SOT-89
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 VO 3.168 3.3 3.432 V Tj=25℃, 5.3V≤Vi≤20V, IO=1mA-40mA 3
Output voltage VO 3.135 3.465 V 5.3V≤Vi≤20V, IO=1mA-40mA 3
Load regulation Regload 60 mV Tj=25℃, IO=1mA-100mA 3
Load regulation Regload 30 mV Tj=25℃, IO=1mA-40mA 3
Line regulation Regline 150 mV 5.3V≤Vi≤20V, Tj=25℃ 3
Line regulation Regline 100 mV 6.3V≤Vi≤20V, Tj=25℃ 3
Input bias current IIB 6 mA Tj=25℃ 3
Input bias current IIB 5.5 mA Tj=125℃ 3
Input bias current change △IIB 1.5 mA 6.3V≤Vi≤20V 3
Input bias current change △IIB 0.1 mA 1mA≤IO≤40mA 3
Ripple rejection RR 41 49 dB IO=40mA, 6.3V≤Vi≤16.3V, f=120Hz, Tj=25℃ 3
Dropout voltage VI-VO 1.7 V Tj=25℃ 3
Input voltage (output 3.3V-9V variant range) VI 30 V Printed range (3.3V-9V) 2
Maximum output current ICM 100 mA 2
Power dissipation PD 500 mW 2
Operating junction temperature TOPR -40 125 ℃ 2
Storage temperature range Tj,Tstg -40 150 ℃ 2
Output noise voltage VN 40 μV 10Hz≤f≤100KHz 3

CAD (KiCad official)

  • Symbol: MS78L33
  • Footprint: Package_TO_SOT_SMD:SOT-89-3
  • 3D model: SOT-89 (KiCad packages3D, STEP)
  • 3D model files: ms78l33-etched.step / ms78l33-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ms78l33.step / ms78l33.glb are the bare package body.

Provenance

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

  • Datasheet: MSKSEMI datasheet (9 pp, sha256 b3c395624ab350b1, retrieved 2026-10-18, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-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