component
LM2575S-3.3-MS
Public Made by Adomby adom
MSKSEMI DC-DC Converters, TO-263-5. 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
markdownLM2575S-3.3-MS
MSKSEMI · DC-DC Converters · TO-263-5
LM2575S-3.3-MS from MSKSEMI, in a TO-263-5. 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 | Vin | power_in | Positive input supply for the switching regulator, which needs a suitable input bypass capacitor; the LM2575 operating supply range is 4.75V to 40V for the 3.3V version, with an absolute maximum supply voltage of 45V. |
| 2 | Output | output | Internal switch output that switches between (VIN − VSAT) and approximately −0.5V, and the output-to-ground steady-state voltage is limited to −1V, so the PC board copper on this pin should be kept small to limit coupling. |
| 3 | Gnd | power_in | Circuit ground for the regulator, to be connected using a ground plane or single-point grounding located close to the IC. |
| 4 | Feedback | input | Senses the regulated output voltage to close the feedback loop, with a feedback pin voltage limited to −0.3V to +25V. |
| 5 | ON/OFF | input | Logic-level shutdown input in which pulling below approximately 1.3V turns the regulator on and pulling above 1.3V shuts it off, with a maximum pin voltage of 25V; if unused it can be tied to ground or left open, leaving the regulator on. |
| 6 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | MSKSEMI |
| Package | TO-263-5 |
| Category | Power Management (PMIC) |
| Pins | 6 |
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 (25 C) | VOUT | 3.168 | 3.3 | 3.432 | V | TJ = 25 C; 4.75V ≤ VIN ≤ 40V, 0.2A ≤ ILOAD ≤ 2A | 4 |
| Output voltage (full operating temperature range) | VOUT | 3.135 | 3.465 | V | Full operating temperature range; 4.75V ≤ VIN ≤ 40V, 0.2A ≤ ILOAD ≤ 2A | 4 | |
| Oscillator frequency (25 C) | fO | 127 | 150 | 173 | kHz | TJ = 25 C; Note 6 | 5 |
| Oscillator frequency (full operating temperature range) | fO | 110 | 173 | kHz | Full operating temperature range; Note 6 | 5 | |
| Saturation voltage (25 C) | VSAT | 1.16 | 1.4 | V | IOUT = 2A (Notes 7, 8); TJ = 25 C | 5 | |
| Saturation voltage (full operating temperature range) | VSAT | 1.5 | V | IOUT = 2A (Notes 7, 8); full operating temperature range | 5 | ||
| Current limit peak current (25 C) | ICL | 3.6 | 4.5 | 6.9 | A | Peak current (Notes 7, 8); TJ = 25 C | 5 |
| Current limit peak current (full operating temperature range) | ICL | 3.4 | 7.5 | A | Peak current (Notes 7, 8); full operating temperature range | 5 | |
| Output leakage current | IL | 50 | µA | Output = 0V (Notes 7, 9) | 5 | ||
| Output leakage current | IL | 2 | 30 | mA | Output = −1V (Note 10) | 5 | |
| Quiescent current | IQ | 5 | 10 | mA | Note 9 | 5 | |
| Standby quiescent current (25 C) | ISTBY | 80 | 200 | µA | ON/OFF pin = 5V (OFF) (Note 10); TJ = 25 C | 5 | |
| Standby quiescent current (full operating temperature range) | ISTBY | 250 | µA | ON/OFF pin = 5V (OFF) (Note 10); full operating temperature range | 5 | ||
| ON/OFF pin threshold voltage, low (regulator ON) | VIH | 1.3 | 0.6 | V | 5 | ||
| ON/OFF pin threshold voltage, high (regulator OFF) | VIL | 2 | 1.3 | V | 5 | ||
| ON/OFF pin input current (regulator OFF) | IH | 5 | 15 | µA | VLOGIC = 2.5V (Regulator OFF) | 6 | |
| ON/OFF pin input current (regulator ON) | IL | 0.02 | 5 | µA | VLOGIC = 0.5V (Regulator ON) | 6 | |
| ON/OFF pin input voltage | -0.3 | 25 | V | 3 | |||
| Feedback pin voltage | -0.3 | 25 | V | 3 | |||
| Output voltage to ground (steady state) | -1 | V | Steady state | 3 | |||
| Maximum supply voltage (LM2575) | 45 | V | LM2575 (standard, not HV) | 3 | |||
| Storage temperature range | -65 | 150 | °C | 3 | |||
| Maximum junction temperature | 150 | °C | 3 | ||||
| Lead temperature, vapor phase | 215 | °C | Vapor phase, 60 sec, S package | 3 | |||
| Lead temperature, infrared | 245 | °C | Infrared, 10 sec, S package | 3 | |||
| Operating temperature range (junction) | TJ | -40 | 125 | °C | 3 | ||
| Supply voltage (LM2575) | 40 | V | LM2575 (standard, not HV) | 3 | |||
| Thermal resistance, junction to case | JC | 2 | °C/W | TO-220 or TO-263 package, junction to case | 5 |
CAD (KiCad official)
- Symbol:
LM2575S-3.3-MS - Footprint:
Package_TO_SOT_SMD:TO-263-5_TabPin6 - 3D model: TO-263-5 (KiCad packages3D, STEP)
- 3D model files:
lm2575s-3-3-ms-etched.step/lm2575s-3-3-ms-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm2575s-3-3-ms.step/lm2575s-3-3-ms.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: MSKSEMI datasheet (19 pp, sha256
ba1ba56f85adba0d, retrieved 2026-10-19, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-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).