component

SY58874UFAC

Public Made by Adom

by adom

Silergy Corp AC-DC Controllers And Regulators, SOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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SY58874UFAC

Silergy Corp · AC-DC Controllers And Regulators · SOP-8

SY58874UFAC from Silergy Corp, in a SOP-8. 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 CS passive Peak current limit set pin; the datasheet gives the CS limit as VCS_LIMIT 530 mV, and the internal GM error amplifier output is pinned out to this pin.
2 FB input Voltage feedback pin, connected to a resistor divider to sense the output voltage; the absolute maximum rating is -0.3V to 16V and the internal reference is 1.225 V.
3 GND power_in Ground pin.
4 VCC power_in Power supply pin; the datasheet gives the absolute maximum rating as -0.3V to 20V, the turn-on threshold as 14 V and the turn-off threshold as 7.45 V.
5 LX passive Internal high-voltage MOSFET drain pin, rated 520 V (BV of HV MOSFET).
6 LX passive Internal high-voltage MOSFET drain pin, rated 520 V (BV of HV MOSFET).
7 LX passive Internal high-voltage MOSFET drain pin, rated 520 V (BV of HV MOSFET).
8 LX passive Internal high-voltage MOSFET drain pin, rated 520 V (BV of HV MOSFET).

Key specifications

Parameter Value
Manufacturer Silergy Corp
Package SOP-8
Category Power Management (PMIC)
Pins 8

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
CS pin voltage -0.3 3.6 V 3
FB pin voltage -0.3 16 V 3
VCC pin voltage -0.3 20 V 3
LX pin voltage (HV MOSFET drain) 520 V 3
Power Dissipation SO8 1.1 W TA = 25°C 3
Lead Temperature (Soldering) 260 °C Soldering, 10 sec. 3
Storage Temperature Range -65 150 °C 3
VCC Turn-on Threshold VVCC_ON 14 V 4
VCC Turn-off Threshold VVCC_OFF 7.45 V 4
VCC Shunt Voltage VVCC_SHUNT 14.8 V VVCC>2mA 4
Start up Current IST 53 µA VVCC=12V 4
Quiescent Current IQ 270 µA 4
CS Limit VCS_LIMIT 530 mV 4
Reference Voltage for Feedback VREF 1.225 V 4
Internal OVP Voltage Threshold VREF_OVP 1.4 V 4
Min ON Time TON_MIN 700 ns 4
Max ON Time TON_MAX 20 µs 4
Min OFF Time TOFF_MIN 1.7 µs 4
Max OFF Time TOFF_MAX 50 µs 4
BV of HV MOSFET VBV 520 V 4
Rdson of HV MOSFET RDSON 3.4 Ω 4
Thermal Shut Down Temperature TSD 160 ºC 4
Package thermal resistance junction-to-ambient θJA 88 °C/W Natural convection, TA=25°C, JEDEC 51-3 low-K board (Note 2) 3
Package thermal resistance junction-to-case θJC 45 °C/W 3

CAD (KiCad official)

  • Symbol: SY58874UFAC
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOP-8 (KiCad packages3D, STEP)
  • 3D model files: sy58874ufac-etched.step / sy58874ufac-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sy58874ufac.step / sy58874ufac.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Silergy Corp datasheet (8 pp, sha256 753b3ff1d4af7eaf, retrieved 2026-10-18, 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