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LM2576S-3.3-MS

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MSKSEMI DC-DC Converters, TO-263-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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LM2576S-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.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lm2576s-3-3-ms.step / lm2576s-3-3-ms.glb are 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, primary claude-haiku-5-5 (text), consensus claude-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).

Datasheet PDF