component

SA3525SCTR

Public Made by Adom

by adom

Hangzhou Silan Microelectronics DC-DC Converters, SOP-16. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.

componentpmicsa3525sctr
Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity

3D Model

Open in new tab ↗
Loads on click. Unloads only if this page sits in the background.

Symbol & Footprint

Schematic Symbol

Open full view ↗
Loads on click. Unloads only if this page sits in the background.

PCB Footprint

Open full view ↗
Loads on click. Unloads only if this page sits in the background.

Datasheet

Open in new tab ↗
Loads on click. Unloads only if this page sits in the background.
Download PDF
Contents

README

markdown

SA3525SCTR

Hangzhou Silan Microelectronics · DC-DC Converters · SOP-16

SA3525SCTR from Hangzhou Silan Microelectronics, in a SOP-16. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 E/A- input Error amplifier inverting input. Feedback voltage-divider node for the internal error amplifier (open-loop gain ~80 dB, CMRR ~90 dB).
2 E/A+ input Error amplifier non-inverting input. Typically tied to the 5.1 V VREF through a divider to set the regulation setpoint. Common-mode range 1.5 V to 5.2 V.
3 /SYNC bidirectional Oscillator sync I/O. Active-low sync input (threshold ~2 V, input current ~1.3 mA at 3.5 V) allowing an external clock to synchronize the internal oscillator; also outputs the internal sync pulse.
4 OSCOUT output Oscillator clock output. Provides the internal oscillator waveform (clock amplitude ~4 V, width ~0.6 µs typ) for external timing or blanking use.
5 CT passive Oscillator timing capacitor connection. External CT to GND sets oscillator frequency together with RT (fOSC up to 400 kHz with CT = 470 pF, RT = 2 kΩ).
6 RT passive Oscillator timing resistor connection. External RT to GND sets the CT charge current and hence the oscillator frequency.
7 Discharge output Timing-capacitor discharge pin. Provides the CT discharge path to program the oscillator deadtime; typically connected through a resistor between CT and this pin.
8 Soft-Start passive Soft-start capacitor input. An external capacitor to GND is charged by the internal ~51 µA source (25-80 µA) to slowly ramp the PWM duty cycle at startup.
9 EAOUT output Error amplifier output / PWM comparator compensation node. Loop compensation network (R/C to E/A-) attaches here; voltage on this pin (VTH1=0.9 V to VTH2=3.2 V typ) sets the PWM duty cycle (0 to 49%).
10 /Shutdown input External shutdown input. Pulling this pin above VTH(SD) (~1.3 V typ) forces the outputs low and discharges the soft-start capacitor. Input current ~0.3 mA at 2.5 V.
11 AOUT output Push-pull PWM output A. Alternates with BOUT at half oscillator frequency; sinks/sources up to 400 mA peak (500 mA abs max). VOH ~19 V at 20 mA sourcing when VC = 20 V.
12 GND power_in Signal ground reference for the IC and return for all logic, oscillator, error amp, and output driver currents.
13 VC power_in Output-stage collector bias supply. Separate power rail (up to 40 V abs max) for the AOUT/BOUT push-pull totem drivers, allowing the gate-drive rail to differ from the VCC control-logic supply.
14 BOUT output Push-pull PWM output B. Complements AOUT with 180° phase offset for driving external totem-pole MOSFET or transformer-coupled gate stages; same 400 mA peak drive spec.
15 VCC power_in Main bias supply input. Operating range 8-35 V (40 V abs max), quiescent current ~12 mA typ (20 mA max). UVLO threshold ~8.8 V typ turns the outputs off below the lockout point.
16 VREF power_out 5.1 V ±1% precision reference output. Sourced up to 20 mA for external divider/bias use (50 mA abs max, short-circuit current ~80 mA); typically bypassed with 0.1 µF to GND.

Key specifications

Parameter Value
Manufacturer Hangzhou Silan Microelectronics
Package SOP-16
Category PMIC
Pins 16

Ordering variants

Same part, different packaging or reel option.

  • SA3525SCTR
  • SA3525SCTRDC

CAD (KiCad official)

  • Symbol: SA3525SCTR
  • Footprint: Package_SO:SOIC-16_3.9x9.9mm_P1.27mm
  • 3D model: SOP-16 (KiCad packages3D, STEP)
  • 3D model files: sa3525sctr-etched.step / sa3525sctr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sa3525sctr.step / sa3525sctr.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
sa3525sctr.step 217 KB You want the bare part, or you mark your own boards.
sa3525sctr-etched.step 2.8 MB You want the part with SA3525SCTR already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 687 faces against 267 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

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

  • Datasheet: Hangzhou Silan Microelectronics datasheet (8 pp, sha256 a7e088aa93d1a759, retrieved 2026-08-17, tier: lcsc)
  • Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
  • Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF