component
LM2576S-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
markdownLM2576S-3.3-MS
MSKSEMI · DC-DC Converters · TO-263-5
LM2576S-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 | Input supply voltage; the LM2576 operating supply range is 40 V to 57 V for the HV version, with an absolute maximum supply voltage of 45 V (LM2576) and 57 V (LM2576HV). |
| 2 | Output | output | Switching output that drives the external inductor and catch diode; it must not go below -1 V to ground in steady state. |
| 3 | Gnd | power_in | Ground reference pin for the regulator and the external components. |
| 4 | Feedback | input | Output voltage feedback input, which is set to 1.23 V reference for the adjustable version and is internally fixed for the 3.3 V version. |
| 5 | ON/OFF | input | Shutdown control that is active low or floating (TTL level, VIH 2.2/2.4 V min, VIL 1.0/0.8 V max), and its absolute input range is -0.3 V to +VIN. |
| 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 |
|---|---|---|---|---|---|---|---|
| VOUT Output Voltage (VIN =12V, ILOAD =0.5A) | VOUT | 3.234 | 3.3 | 3.366 | V | VIN =12V, ILOAD =0.5A | 4 |
| VOUT Output Voltage LM2576, room-temperature limits (standard face) | VOUT | 3.168 | 3.3 | 3.432 | V | 6V ≤ VIN ≤ 40V, 0.5A ≤ ILOAD ≤ 3A | 4 |
| VOUT Output Voltage LM2576, temperature-extreme limits (bold face) | VOUT | 3.135 | 3.3 | 3.465 | V | 6V ≤ VIN ≤ 40V, 0.5A ≤ ILOAD ≤ 3A | 4 |
| Oscillator Frequency, room-temperature limits | fO | 47 | 52 | 58 | kHz | Note 8 | 6 |
| Oscillator Frequency, temperature-extreme limits | fO | 42 | 52 | 63 | kHz | Note 8 | 6 |
| DC Max Duty Cycle (ON) | DC | 93 | 98 | % | Note 5 | 6 | |
| Current Limit, room-temperature limits | ICL | 4.2 | 5.8 | 6.9 | A | Notes 4, 8 | 6 |
| Current Limit, temperature-extreme limits | ICL | 3.5 | 5.8 | 7.5 | A | Notes 4, 8 | 6 |
| Saturation Voltage, room-temperature limit | VSAT | 1.4 | 1.8 | V | IOUT =3A (Note 4) | 6 | |
| Saturation Voltage, temperature-extreme limit | VSAT | 1.4 | 2 | V | IOUT =3A (Note 4) | 6 | |
| Output Leakage Current (limit printed as 30 mA max) | IL | 7.5 | 30 | mA | Output = -1V | 6 | |
| Output Leakage Current (second unlabeled limit, 2 mA max) | IL | 2 | mA | Output = -1V | 6 | ||
| Quiescent Current | IQ | 5 | 10 | mA | Note 6 | 6 | |
| Standby Quiescent Current | ISTBY | 50 | 200 | µA | ON/OFF Pin = 5V (OFF) | 6 | |
| ON/OFF Pin Logic Input Level VIH, room-temperature limit | VIH | 2.2 | 1.4 | V | VOUT = 0V | 6 | |
| ON/OFF Pin Logic Input Level VIH, temperature-extreme limit | VIH | 2.4 | 1.4 | V | VOUT = 0V | 6 | |
| ON/OFF Pin Logic Input Level VIL, room-temperature limit | VIL | 1.2 | 1 | V | VOUT = Nominal Output Voltage | 6 | |
| ON/OFF Pin Logic Input Level VIL, temperature-extreme limit | VIL | 1.2 | 0.8 | V | VOUT = Nominal Output Voltage | 6 | |
| ON/OFF Pin Input Current IIH | IIH | 12 | 30 | µA | ON/OFF Pin = 5V (OFF) | 6 | |
| ON/OFF Pin Input Current IIL | IIL | 0 | 10 | µA | ON/OFF Pin = 0V (ON) | 6 | |
| Maximum Supply Voltage (LM2576) | 45 | V | 4 | ||||
| ON/OFF Pin Input Voltage | -0.3 | V | -0.3V ≤ V ≤ +VIN | 4 | |||
| Output Voltage to Ground (Steady State) | -1 | V | Steady state | 4 | |||
| Storage Temperature Range | -65 | 150 | °C | 4 | |||
| Maximum Junction Temperature | 150 | °C | 4 | ||||
| Minimum ESD Rating | 2 | kV | C= 100pF, R = 1.5 kΩ | 4 | |||
| Lead Temperature | 260 | °C | Soldering, 10 Seconds | 4 | |||
| Supply Voltage (LM2576) | 40 | V | LM2576 | 4 | |||
| Operating Junction Temperature Range | TJ | -40 | 125 | °C | 4 |
CAD (KiCad official)
- Symbol:
LM2576S-3.3-MS - Footprint:
Package_TO_SOT_SMD:TO-263-5_TabPin6 - 3D model: TO-263-5 (KiCad packages3D, STEP)
- 3D model files:
lm2576s-3-3-ms-etched.step/lm2576s-3-3-ms-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm2576s-3-3-ms.step/lm2576s-3-3-ms.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: MSKSEMI datasheet (12 pp, sha256
bc60041f4dd916f0, retrieved 2026-10-18, 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).