component
MS78L33
Public Made by Adomby 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.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownMS78L33
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.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ms78l33.step/ms78l33.glbare 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, primaryclaude-sonnet-5-5(text+vision), consensusclaude-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).