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HT2576S-ADJ
Public Made by Adomby adom
HTCSEMI AC-DC Controllers & Regulators, 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
markdownHT2576S-ADJ
HTCSEMI · AC-DC Controllers & Regulators · TO-263-5
HT2576S-ADJ from HTCSEMI, 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 | Supply input voltage pin; maximum supply voltage 45 V absolute maximum, 40 V operating. |
| 2 | Output | output | Switch output pin sourcing current to the inductor; steady-state output voltage to ground must not go below -1.0 V. |
| 3 | Ground | power_in | Ground pin. |
| 4 | Feedback | input | Feedback sense input; regulated to 1.23 V (Vref) on the adjustable version, with feedback bias current of 100 nA typical max at 25 C. |
| 5 | ON/OFF | input | TTL-compatible shutdown input; high (about 5 V) turns the regulator off into standby, input range -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 | HTCSEMI |
| Package | TO-263-5 |
| Category | Power Management ICs |
| 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 |
|---|---|---|---|---|---|---|---|
| Feedback Voltage | Vout | 1.217 | 1.243 | V | Vin = 12 V, ILoad = 0.5 A, Vout = 5.0 V, TJ = 25°C | 3 | |
| Feedback Voltage | Vout | 1.193 | 1.267 | V | 8.0 V ≤ Vin ≤ 40 V, 0.5 A ≤ ILoad ≤ 3.0 A, Vout = 5.0 V, TJ = 25°C | 3 | |
| Feedback Voltage | Vout | 1.18 | 1.28 | V | 8.0 V ≤ Vin ≤ 40 V, 0.5 A ≤ ILoad ≤ 3.0 A, Vout = 5.0 V, TJ = -40 to +125°C | 3 | |
| Efficiency | η | 67 | % | Vin = 12 V, ILoad = 3.0 A, Vout = 5.0 V | 3 | ||
| Feedback Bias Current | Ib | 100 | nA | Vout = 5.0 V, TJ = 25°C | 4 | ||
| Feedback Bias Current | Ib | 500 | nA | Vout = 5.0 V, TJ = -40 to +125°C | 4 | ||
| Oscillator Frequency | fosc | 42 | 63 | kHz | TJ = -40 to +125°C | 4 | |
| Saturation Voltage | Vsat | 1.8 | V | Iout = 3.0 A, TJ = 25°C | 4 | ||
| Saturation Voltage | Vsat | 2 | V | Iout = 3.0 A, TJ = -40 to +125°C | 4 | ||
| Max Duty Cycle (on) | DC | 93 | % | Feedback removed from output and connected to 0 V | 4 | ||
| Current Limit (Peak Current) | ICL | 4.2 | 6.9 | A | TJ = 25°C | 4 | |
| Current Limit (Peak Current) | ICL | 3.5 | 7.5 | A | TJ = -40 to +125°C | 4 | |
| Output Leakage Current | IL | 2 | mA | Output = 0 V, TJ = 25°C, Vin = 40 V | 4 | ||
| Output Leakage Current | IL | 30 | mA | Output = -1.0 V, TJ = 25°C, Vin = 40 V | 4 | ||
| Quiescent Current | IQ | 10 | mA | TJ = 25°C | 4 | ||
| Quiescent Current | IQ | 11 | mA | TJ = -40 to +125°C | 4 | ||
| Standby Quiescent Current | Istby | 200 | uA | ON/OFF Pin = 5.0 V (off), TJ = 25°C | 4 | ||
| ON/OFF Pin Logic Input Level High | VIH | 2.2 | V | Vout = 0 V, TJ = 25°C | 4 | ||
| ON/OFF Pin Logic Input Level High | VIH | 2.4 | V | Vout = 0 V, TJ = -40 to +125°C | 4 | ||
| ON/OFF Pin Logic Input Level Low | VIL | 1 | V | Vout = Nominal Output Voltage, TJ = 25°C | 4 | ||
| ON/OFF Pin Logic Input Level Low | VIL | 0.8 | V | Vout = Nominal Output Voltage, TJ = -40 to +125°C | 4 | ||
| ON/OFF Pin Input Current | IIH | 30 | uA | ON/OFF Pin = 5.0 V (off), TJ = 25°C | 4 | ||
| ON/OFF Pin Input Current | IIL | 10 | uA | ON/OFF Pin = 0 V (on), TJ = 25°C | 4 | ||
| Maximum Supply Voltage | Vin | 45 | V | 2 | |||
| ON/OFF Pin Input Voltage | -0.3 | V | -0.3 V ≤ V ≤ +Vin (max = +Vin) | 2 | |||
| Output Voltage to Ground (Steady-State) | -1 | V | 2 | ||||
| Storage Temperature Range | Tstg | -65 | 150 | °C | 2 | ||
| Minimum ESD Rating | 2 | kV | Human Body Model: C = 100 pF, R = 1.5 kΩ | 2 | |||
| Lead Temperature | 260 | °C | Soldering, 10 seconds | 2 | |||
| Maximum Junction Temperature | TJ | 150 | °C | 2 | |||
| Operating Junction Temperature Range | TJ | -40 | 125 | °C | 3 | ||
| Supply Voltage | Vin | 40 | V | 3 | |||
| Thermal Resistance, Junction-to-Ambient | RθJA | 70 | °C/W | TO-263, 5-Lead (D2PAK) | 2 | ||
| Thermal Resistance, Junction-to-Case | RθJC | 5 | °C/W | TO-263, 5-Lead (D2PAK) | 2 | ||
| Oscillator Frequency | fosc | 52 | kHz | Fixed frequency internal oscillator | 1 |
CAD (KiCad official)
- Symbol:
HT2576S-ADJ - Footprint:
Package_TO_SOT_SMD:TO-263-5_TabPin6 - 3D model: TO-263-5 (KiCad packages3D, STEP)
- 3D model files:
ht2576s-adj-etched.step/ht2576s-adj-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ht2576s-adj.step/ht2576s-adj.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: HTCSEMI datasheet (11 pp, sha256
5f988aa94798a70c, retrieved 2026-10-22, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-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).