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LD7575PS

Public Made by Adom

by adom

Leadtrend Tech AC-DC Controllers and Regulators, SOIC-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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3D Model

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Datasheet

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Contents

README

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LD7575PS

Leadtrend Tech · AC-DC Controllers and Regulators · SOIC-8

LD7575PS from Leadtrend Tech, in a SOIC-8. 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 RT input Oscillator programming pin. Connect a resistor to GND to set the switching frequency (e.g. RT=100kΩ → ~65kHz typ). Recommended switching frequency range 50-130kHz.
2 COMP input Voltage feedback / compensation pin (equivalent to COMP pin of UC384X). Connect an opto-coupler to close the regulation loop. Open-loop voltage ~6.0V; green-mode threshold ~2.35V.
3 CS input Current sense input from the external MOSFET source resistor. Max input threshold 0.85V; internal leading-edge blanking ~350ns; input impedance ≥1MΩ.
4 GND power_in Device ground reference for all internal circuitry.
5 OUT output Gate drive output to the external power MOSFET. Totem-pole driver with up to 500mA sink/source; output high ≥9V, output low ≤1V at Io=20mA, VCC=15V.
6 VCC power_in Supply voltage pin. Recommended 11-25V; absolute max 30V. UVLO(on) ~16V, UVLO(off) ~10V, OVP trip ~27.5V. Bypass with 10-47µF.
7 NC unconnected Unconnected pin. Leave floating.
8 HV power_in High-voltage startup pin (rated up to 500V). Connect to the positive terminal of the bulk capacitor to provide ~1mA startup current to Vcc. Once Vcc trips UVLO(on) the HV current source is switched off to eliminate standby power loss.

Key specifications

Parameter Value
Manufacturer Leadtrend Tech
Package SOIC-8
Category PMIC
Pins 8

Ordering variants

Same part, different packaging or reel option.

  • LD7575PS
  • LD7575PSPN

CAD (KiCad official)

  • Symbol: LD7575PS
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOIC-8 (KiCad packages3D, STEP)
  • 3D model files: ld7575ps-etched.step / ld7575ps-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ld7575ps.step / ld7575ps.glb are the bare package body.

Provenance

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

  • Datasheet: Leadtrend Tech datasheet (18 pp, sha256 52a54b667919e381, retrieved 2026-08-17, tier: lcsc)
  • 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