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SY8035DBC

Public Made by Adom

by adom

Silergy Corp DC-DC Converters, DFN-10(3x3). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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SY8035DBC

Silergy Corp · DC-DC Converters · DFN-10(3x3)

SY8035DBC from Silergy Corp, in a DFN-10(3x3). 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 LX output Phase node pin that connects to the inductor; its PCB copper area should be kept as small as possible to improve noise immunity.
2 LX output Phase node pin that connects to the inductor; its PCB copper area should be kept as small as possible to improve noise immunity.
3 LX output Phase node pin that connects to the inductor; its PCB copper area should be kept as small as possible to improve noise immunity.
4 PG output Open-drain power-good output that is low when the output is below 90% of the regulation voltage and high otherwise, and needs a pull-up resistor (above 100k) to the input.
5 EN input Enable control that turns the device on when pulled high (above 1.5V) and shuts it down when below 0.4V, with an integrated 1MΩ pull-down resistor.
6 FB input Output feedback input that connects to the center of the output resistor divider, with VOUT = 0.6×(1+R1/R2).
7 SS passive Soft-start programming pin; a capacitor from this pin to ground sets the soft-start time as tSS = max(600µs, CSS×0.6V/10µA).
8 SVIN power_in Signal power input that must be decoupled to GND with at least a 1µF ceramic capacitor.
9 PVIN power_in Power input (2.7V to 5.5V supply range) that must be decoupled to GND with at least a 22µF ceramic capacitor.
10 PVIN power_in Power input (2.7V to 5.5V supply range) that must be decoupled to GND with at least a 22µF ceramic capacitor.
11 GND power_in Ground pin; the center pad of the package is also used as GND and should be tied to a ground plane with vias underneath.

Key specifications

Parameter Value
Manufacturer Silergy Corp
Package DFN-10(3x3)
Category Power Management (PMIC)
Pins 11

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 2.7 5.5 V 3
Feedback Reference Voltage VREF 0.591 0.6 0.609 V 3
FB Input Current IFB -50 50 nA VFB=VIN 3
Shutdown Current ISHDN 0.1 1 µA EN=0 3
Quiescent Current IQ 150 µA IOUT=0, VFB=VREF ⋅ 105% 3
PFET RON RDS(ON)-P 45 mΩ 3
NFET RON RDS(ON)-N 35 mΩ 3
PFET Current Limit ILIM 6 A 3
EN Rising Threshold VENH 1.5 V 3
EN Falling Threshold VENL 0.4 V 3
Input UVLO Threshold VUVLO 2.7 V 3
UVLO Hysteresis VHYS 0.2 V 3
Oscillator Frequency FOSC 1 MHz IOUT=1A 3
Min ON Time 80 ns 3
Max Duty Cycle 100 % 3
Thermal Shutdown Temperature TSD 150 °C Shutdown temperature 3
Thermal Shutdown Hysteresis TSD 10 °C Hysteresis 3
Soft Start Time tSS 6 ms CSS=100nF 3
Soft Start Time without CSS tSS 0.6 ms Without CSS 3
Phase Node Discharge Resistance RDISCHG 40 Ω 3
Supply Input Voltage (absolute maximum) -0.3 6.5 V 2
Enable, FB Voltage (absolute maximum) -0.3 V Printed as VIN + 0.6V 2
Power Dissipation PD 2.6 W TA = 25°C, DFN3X3-10 2
Package Thermal Resistance junction-to-ambient θJA 38 °C/W 2
Package Thermal Resistance junction-to-case θJC 8 °C/W 2
Junction Temperature Range (absolute maximum) -40 150 °C 2
Lead Temperature (soldering, 10 sec) 260 °C Soldering, 10 sec 2
Storage Temperature Range -65 150 °C 2
ESD HBM 2 kV Human Body Model 2
ESD MM 200 V Machine Model 2
Supply Input Voltage (recommended) 2.7 5.5 V 2
Junction Temperature Range (recommended) -40 125 °C 2
Ambient Temperature Range (recommended) -40 85 °C 2

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part Material Colour / plating Datasheet says Page
contacts copper 3) The PCB copper area associated with LX pin must 7

CAD (KiCad official)

  • Symbol: SY8035DBC
  • Footprint: Package_DFN_QFN:DFN-10-1EP_3x3mm_P0.5mm_EP1.55x2.48mm
  • 3D model: DFN-10(3x3) (KiCad packages3D, STEP)
  • 3D model files: sy8035dbc-etched.step / sy8035dbc-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sy8035dbc.step / sy8035dbc.glb are the bare package body.

Provenance

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

  • Datasheet: Silergy Corp datasheet (9 pp, sha256 7f77345b846744a4, 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