component
SY6281AAC
Public Made by Adomby adom
Silergy Corp Power Distribution Switches, SOT-23-5. 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
markdownSY6281AAC
Silergy Corp · Power Distribution Switches · SOT-23-5
SY6281AAC from Silergy Corp, in a SOT-23-5. 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 | OUT | power_out | Output pin of the power switch; at shutdown OUT can be forced higher than IN without back-feeding (reverse blocking), and the output is discharged through RDIS (150 Ω typ) during shutdown. |
| 2 | GND | power_in | Ground pin; per Note 2 it is also the case position used for the θJC measurement of the SOT-23-5 package. |
| 3 | ISET | passive | Current limit programming pin; connect a resistor Rset from this pin to GND, with Ilim (A) = 6800 / Rset (Ω), giving 0.75 to 1.25 A at Rset = 6.8 kΩ and a stated Ilim range of 0.4 A (min) to 2 A (max). |
| 4 | ENB | input | Active-low ON/OFF control: pull low to enable the IC and do not float the pin; ENB rising threshold is 2 V and falling threshold is 0.8 V, with 1 µA max leakage at 5.5 V. |
| 5 | IN | power_in | Input supply pin; operating range is 2.4 V to 5.5 V, with an IN UVLO threshold of 2.3 V and 0.1 V hysteresis. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Silergy Corp |
| Package | SOT-23-5 |
| Category | Power Management (PMIC) |
| Pins | 5 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Input Voltage Range | VIN | 2.4 | 5.5 | V | 3 | ||
| Shutdown Input Current | ISHDN | 0.1 | 1 | µA | Open load, IC Disabled. | 3 | |
| Over Current Limit | ILIM | 0.75 | 1 | 1.25 | A | RSET=6.8kΩ | 3 |
| Over Current Limit minimum | ILIM(min) | 0.4 | A | 3 | |||
| Over Current Limit maximum | ILIM(max) | 2 | A | 3 | |||
| Input Voltage Range (recommended) | VIN | 2.4 | 5.5 | V | IN pin | 2 | |
| All other pins voltage (recommended) | 0 | 5.5 | V | All other pins | 2 | ||
| Junction Temperature Range (recommended) | -40 | 125 | °C | 2 | |||
| Ambient Temperature Range (recommended) | TA | -40 | 85 | °C | 2 | ||
| All pins voltage (absolute maximum) | 6 | V | All pins | 2 | |||
| Storage Temperature Range | -65 | 150 | °C | 2 | |||
| Junction Temperature Range (absolute maximum) | 150 | °C | 2 | ||||
| Lead Temperature (soldering) | 260 | °C | Soldering, 10 sec. | 2 | |||
| Power Dissipation | PD | 0.6 | W | TA = 25°C, SOT23-5 | 2 | ||
| Package Thermal Resistance junction-to-ambient | θJA | 200 | °C/W | 2 | |||
| Package Thermal Resistance junction-to-case | θJC | 130 | °C/W | 2 | |||
| Quiescent Supply Current | IQ | 25 | µA | Open load, IC Enabled. | 3 | ||
| FET RON | RDS(ON)1 | 80 | mΩ | 3 | |||
| ENB Rising Threshold | VENB(H) | 2 | V | 3 | |||
| ENB Falling Threshold | VENB(L) | 0.8 | V | 3 | |||
| ENB Leakage | IENB | 1 | µA | VENB=5.5V | 3 | ||
| IN UVLO Threshold | VIN,UVLO | 2.3 | V | 3 | |||
| IN UVLO Hysteresis | VIN,HYS | 0.1 | V | 3 | |||
| Turn-ON Time | TON | 120 | us | RL=10Ω | 3 | ||
| Turn-OFF Time | TOFF | 10 | us | RL=10Ω, CL=1uF | 3 | ||
| OUT Shutdown Discharge Resistance | RDIS | 150 | Ω | 3 | |||
| Thermal Shutdown Temperature | TSD | 130 | ℃ | 3 | |||
| Thermal Shutdown Hysteresis | 20 | ℃ | 3 |
CAD (KiCad official)
- Symbol:
SY6281AAC - Footprint:
Package_TO_SOT_SMD:SOT-23-5 - 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files:
sy6281aac-etched.step/sy6281aac-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sy6281aac.step/sy6281aac.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Silergy Corp datasheet (4 pp, sha256
0ed88887c9dc3202, retrieved 2026-10-17, 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).