component
LM4576R-5.0
Public Made by Adomby adom
HTC Korea TAEJIN Tech DC-DC Converters, TO-263-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
Generated by kicad-footprint-generator · KiCad file format 20260206
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| lm4576r-5-0-etched.step | 17d ago |
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LM4576R-5.0
HTC Korea TAEJIN Tech · DC-DC Converters · TO-263-5
LM4576R-5.0 from HTC Korea TAEJIN Tech, 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 step-down regulator; a suitable input bypass capacitor (Cin) must be present to minimize voltage transients and supply the switching currents, with the datasheet giving a 40V maximum operating supply voltage and 45V absolute maximum. |
| 2 | VOUT | power_out | Emitter of the internal output switch with a typical saturation voltage VSAT of 1.4V, and the PCB area connected to this pin should be kept to a minimum to reduce coupling to sensitive circuitry. |
| 3 | GND | power_in | Circuit ground pin; refer to the datasheet's printed circuit board layout information for its connection. |
| 4 | FEEDBACK | input | Senses the regulated output voltage to close the feedback loop through the internal R1/R2 divider on fixed versions, and on the adjustable version it is the direct error amplifier input with R1/R2 connected externally (adjustable output range 1.23V to 37V). |
| 5 | ON/OFF | input | Logic-level shutdown input where a voltage above the typical 1.4V threshold (up to +Vin) shuts the regulator off, while a voltage below 1.4V or an open pin leaves the regulator on, with total input supply current dropping to approximately 60uA when off. |
| 6 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | HTC Korea TAEJIN Tech |
| 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 TJ=25°C | VOUT | 4.8 | 5 | 5.2 | V | 8V ≤ VIN ≤ 40V, 0.2A ≤ ILOAD ≤ 3A, TJ=25℃ | 6 |
| Output Voltage TJ=-40 to +125°C | VOUT | 4.75 | 5.25 | V | 8V ≤ VIN ≤ 40V, 0.2A ≤ ILOAD ≤ 3A, TJ=-40℃ ~ +125℃ | 6 | |
| Oscillator Frequency TJ=25°C | FOSC | 255 | 300 | 345 | KHz | TJ=25℃ | 7 |
| Oscillator Frequency TJ=-40 to +125°C | FOSC | 230 | 370 | KHz | TJ=-40 to +125℃ | 7 | |
| Saturation Voltage TJ=25°C | VSAT | 1.4 | 1.6 | V | IOUT=3.0A, TJ=25℃ | 7 | |
| Saturation Voltage TJ=-40 to +125°C | VSAT | 1.8 | V | IOUT=3.0A, TJ=-40 to +125℃ | 7 | ||
| Max Duty Cycle | D/C | 93 | 98 | % | Max Duty Cycle ("0") | 7 | |
| Current Limit TJ=25°C | ICL | 4 | 5.7 | 6.9 | A | Peak current, TJ=25℃ | 7 |
| Current Limit TJ=-40 to +125°C | ICL | 3.5 | 7.5 | A | Peak current, TJ=-40 to +125℃ | 7 | |
| Output Leakage Current, Output = 0V | IL | 0.4 | 2 | mA | Output = 0V | 7 | |
| Output Leakage Current, Output = -0.8V | IL | 10 | 30 | mA | Output = -0.8V | 7 | |
| Quiescent Current | IQ | 5 | 10 | mA | TJ=25℃ | 7 | |
| Standby Quiescent Current | ISTBY | 60 | 200 | µA | ON/OFF Pin = 5.0V ("off"), TJ=25℃ | 7 | |
| ON/OFF Pin Logic Input Level High TJ=25°C | VIH | 2.2 | 1.4 | V | VOUT=0V, TJ=25℃ | 7 | |
| ON/OFF Pin Logic Input Level High TJ=-40 to +125°C | VIH | 2.4 | V | VOUT=0V, TJ=-40 to +125℃ | 7 | ||
| ON/OFF Pin Input Current High (Regulator OFF) | IIH | 12 | 30 | µA | ON/OFF Pin = 5.0V (Regulator OFF), TJ=25℃ | 7 | |
| ON/OFF Pin Input Current Low (Regulator ON) | IIL | 0 | 10 | µA | ON/OFF Pin = 0V (Regulator ON), TJ=25℃ | 7 | |
| Maximum Supply Voltage | VIN | 45 | V | 5 | |||
| On/Off Pin Input Voltage | VON/OFF | -0.3 | V | -0.3V ≤ V ≤ +Vin | 5 | ||
| FB Pin Voltage | VFB | -0.3 | V | -0.3V ≤ V ≤ +Vin | 5 | ||
| Output Voltage to Ground (Steady-State) | VOUT | -0.8 | V | Steady-state | 5 | ||
| Thermal Resistance Junction to Ambient (TO-263-5L) | θJA | 70 | ℃/W | TO-263-5L | 5 | ||
| Thermal Resistance Junction to Case (TO-263-5L) | θJC | 5 | ℃/W | TO-263-5L | 5 | ||
| Maximum Junction Temperature | TJ | 150 | ℃ | 5 | |||
| Storage Temperature Range | TSTG | -65 | 150 | ℃ | 5 | ||
| Operating Junction Temperature Range | TJ | -40 | 125 | ℃ | 5 | ||
| Maximum Supply Voltage (operating) | VIN | 40 | V | 5 | |||
| Output Current | IOUT | 3 | A | 5 |
CAD (KiCad official)
- Symbol:
LM4576R-5.0 - Footprint:
Package_TO_SOT_SMD:TO-263-5_TabPin6 - 3D model: TO-263-5 (KiCad packages3D, STEP)
- 3D model files:
lm4576r-5-0-etched.step/lm4576r-5-0-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm4576r-5-0.step/lm4576r-5-0.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: HTC Korea TAEJIN Tech datasheet (9 pp, sha256
15b8d92e46dd03cc, 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).