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LM2576S-15
Public Made by Adomby adom
HGSEMI 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-15
HGSEMI · DC-DC Converters · TO-263-5
LM2576S-15 from HGSEMI, 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 | Unregulated input supply; maximum 40V for LM2576 (60V for LM2576HV). |
| 2 | Output | output | Switch output of the regulator, which sources up to 3A with 5.8A typical current limit. |
| 3 | Ground | power_in | Ground pin; the package tab is also connected to GND. |
| 4 | Feedback | input | Feedback sense input; on the fixed 15V version it senses the output voltage, and it is tied to the output. |
| 5 | ON/OFF | input | Active-low shutdown input with TTL logic levels (VIH 2.2V/2.4V min, VIL 1.0V/0.8V max); taking it to 5V turns the output off with 50uA typical standby current. |
| 6 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | HGSEMI |
| 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 (VIN=25V, Iload=0.5A) | VOUT | 14.7 | 15 | 15.3 | V | VIN = 25V, I负载 = 0.5A | 7 |
| Output voltage (18V≤VIN≤40V, 0.5A≤Iload≤3A) | VOUT | 14.25 | 15 | 15.75 | V | 18V≦VIN≦40V, 0.5A≦I负载≦3A | 7 |
| Oscillator frequency | fO | 42 | 52 | 63 | kHz | 注 10 | 8 |
| Duty cycle (on), max | DC | 93 | 98 | % | 注 4 | 8 | |
| Current limit | ICL | 3.5 | 5.8 | 7.5 | A | 注 3,10 | 8 |
| Saturation voltage | VSAT | 1.4 | 2 | V | IOUT =3A (注 3) | 8 | |
| Output leakage current | IL | 7.5 | mA | 输出= 0V (注 5,6) | 8 | ||
| Output leakage current | IL | 2 | mA | 输出= -1V (注 5,6) | 8 | ||
| Output leakage current | IL | 30 | mA | 输出= -1V (注 5,6) | 8 | ||
| Quiescent current | IQ | 5 | 10 | mA | 注 5 | 8 | |
| Standby quiescent current | ISTBY | 50 | 200 | µA | 通/断管脚=5V (截至断) | 8 | |
| Supply voltage (LM2576) | VIN | 40 | V | 5 | |||
| Operating junction temperature range | TA | -40 | 125 | ℃ | 5 | ||
| Supply voltage (LM2576) | VIN | 40 | V | 5 | |||
| ON/OFF pin input voltage | VON_OFF | -0.3 | V | upper limit printed as +VIN | 5 | ||
| Output voltage to ground (steady state) | -1 | V | steady state | 5 | |||
| Storage temperature range | TSTG | -65 | 150 | ℃ | 5 | ||
| Maximum junction temperature | TJ | 150 | ℃ | 5 | |||
| ESD rating | ESD | 2 | kV | C = 100 pF, R = 1.5 kΩ | 5 | ||
| Lead temperature (soldering, 10 s), TO-220/TO-263 | TLEAD | 245 | ℃ | 焊接 10 秒, TO-220/TO-263 | 5 | ||
| Junction-to-ambient thermal resistance (TO-263) | RθJA | 42.6 | ℃/W | TO-263 column | 5 | ||
| Junction-to-case (top) thermal resistance (TO-263) | RθJC(top) | 43.3 | ℃/W | TO-263 column | 5 | ||
| Junction-to-board thermal resistance (TO-263) | RθJB | 22.4 | ℃/W | TO-263 column | 5 | ||
| Junction-to-top characterization parameter (TO-263) | ψJT | 10.7 | ℃/W | TO-263 column | 5 | ||
| Junction-to-board characterization parameter (TO-263) | ψJB | 21.3 | ℃/W | TO-263 column | 5 | ||
| Junction-to-case (bottom) thermal resistance (TO-263) | RθJC (bot) | 0.4 | ℃/W | TO-263 column | 5 | ||
| Junction-to-ambient thermal resistance, S package | θJA | 50 | ℃/W | S 型封装 (注 9), 0.5 in² copper | 8 |
CAD (KiCad official)
- Symbol:
LM2576S-15 - Footprint:
Package_TO_SOT_SMD:TO-263-5_TabPin6 - 3D model: TO-263-5 (KiCad packages3D, STEP)
- 3D model files:
lm2576s-15-etched.step/lm2576s-15-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm2576s-15.step/lm2576s-15.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: HGSEMI datasheet (14 pp, sha256
eddc94f04fe787be, retrieved 2026-10-18, tier: lcsc) - Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- 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).