component
LM2596S-12-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
markdownLM2596S-12-MS
MSKSEMI · DC-DC Converters · TO-263-5
LM2596S-12-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, rated up to 40V for the LM2596 (57V for the LM2596HV), and needs a suitable input bypass capacitor close to the pin. |
| 2 | Output | output | Internal switch output that swings between (Vin − VSAT) and approximately −0.5V at a duty cycle of about VOUT/VIN, so the copper area on this pin should be kept minimal to limit coupling. |
| 3 | Gnd | power_in | Circuit ground for the regulator, which is the reference for the ON/OFF threshold and the input and output capacitors. |
| 4 | Feedback | input | Senses the regulated output voltage to close the feedback loop, with an absolute maximum pin voltage of −0.3V to +25V. |
| 5 | ON/OFF | input | Shutdown control where pulling below about 1.3V turns the regulator on and pulling above 1.3V (maximum 25V) shuts it down, with the regulator on when the pin is left open or tied to ground. |
| 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 | VOUT | 11.52 | 12 | 12.48 | V | TJ = 25°C; 15V ≤ VIN ≤ 40V, 0.2A ≤ ILOAD ≤ 3A | 4 |
| Output voltage (full operating temperature range) | VOUT | 11.4 | 12 | 12.6 | V | Full operating temperature range; 15V ≤ VIN ≤ 40V, 0.2A ≤ ILOAD ≤ 3A | 4 |
| Oscillator frequency | fO | 127 | 150 | 173 | kHz | TJ = 25°C (Note 6) | 5 |
| Oscillator frequency (full operating temperature range) | fO | 110 | 150 | 173 | kHz | Full operating temperature range (Note 6) | 5 |
| Saturation voltage | VSAT | 1.16 | 1.4 | V | TJ = 25°C; IOUT = 3A (Notes 7, 8) | 5 | |
| Saturation voltage (full operating temperature range) | VSAT | 1.16 | 1.5 | V | Full operating temperature range; IOUT = 3A (Notes 7, 8) | 5 | |
| Current limit peak current | ICL | 3.6 | 4.5 | 6.9 | A | TJ = 25°C (Notes 7, 8) | 5 |
| Current limit peak current (full operating temperature range) | ICL | 3.4 | 4.5 | 7.5 | A | Full operating temperature range (Notes 7, 8) | 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 | ISTBY | 80 | 200 | µA | TJ = 25°C; ON/OFF pin = 5V (OFF) (Note 10) | 5 | |
| Standby quiescent current (full operating temperature range) | ISTBY | 80 | 250 | µA | Full operating temperature range; ON/OFF pin = 5V (OFF) (Note 10) | 5 | |
| ON/OFF pin logic input threshold voltage, low (regulator ON) | VIH | 1.3 | 0.6 | V | Test Circuit Figure 1 | 5 | |
| ON/OFF pin logic input threshold voltage, high (regulator OFF) | VIL | 2 | V | Test Circuit Figure 1 | 5 | ||
| ON/OFF pin input current | IH | 5 | 15 | µA | VLOGIC = 2.5V (Regulator OFF) | 6 | |
| ON/OFF pin input current | IL | 0.02 | 5 | µA | VLOGIC = 0.5V (Regulator ON) | 6 | |
| Thermal resistance, junction to case | θJC | 2 | °C/W | TO-220 or TO-263 package, junction to case | 5 | ||
| Thermal resistance, junction to ambient (TO-263, 0.5 in² copper) | θJA | 50 | °C/W | TO-263 package tab soldered to single PCB with 0.5 in² (1 oz.) copper area (Note 12) | 5 | ||
| Thermal resistance, junction to ambient (TO-263, 2.5 in² copper) | θJA | 30 | °C/W | TO-263 package tab soldered to single-sided PCB with 2.5 in² (1 oz.) copper area (Note 13) | 5 | ||
| Thermal resistance, junction to ambient (TO-263, 3 in² copper double-sided) | θJA | 20 | °C/W | TO-263 package tab soldered to double-sided PCB with 3 in² (1 oz.) copper on LM2596S side and ~16 in² on other side (Note 14) | 5 | ||
| Maximum supply voltage (LM2596) | 45 | V | LM2596 (non-HV) version | 3 | |||
| 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 | |||
| ESD susceptibility, human body model | 2 | kV | Human body model | 3 | |||
| Storage temperature range | -65 | 150 | °C | 3 | |||
| Maximum junction temperature | 150 | °C | 3 | ||||
| Lead temperature, S package vapor phase | 215 | °C | Vapor phase (60 sec.), S package | 3 | |||
| Lead temperature, S package infrared | 245 | °C | Infrared (10 sec.), S package | 3 | |||
| Operating junction temperature range | TJ | -40 | 125 | °C | 3 | ||
| Supply voltage (LM2596) | VIN | 40 | V | LM2596 (non-HV) version | 3 |
CAD (KiCad official)
- Symbol:
LM2596S-12-MS - Footprint:
Package_TO_SOT_SMD:TO-263-5_TabPin6 - 3D model: TO-263-5 (KiCad packages3D, STEP)
- 3D model files:
lm2596s-12-ms-etched.step/lm2596s-12-ms-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm2596s-12-ms.step/lm2596s-12-ms.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: MSKSEMI datasheet (19 pp, sha256
0157580195f9795e, 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).