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SY6281AAC

Public Made by Adom

by adom

Silergy Corp Power Distribution Switches, SOT-23-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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SY6281AAC

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.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sy6281aac.step / sy6281aac.glb are 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, 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