component

lm2576s-adj

Public Unreviewed

by Ray

UMW DC-DC Converters, TO-263-5. Datasheet-verified pinout, KiCad symbol/footprint/3D.

componentpmiclm2576s-adj
Overview Files Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity

3D Model

Open in new tab ↗
Contents

README

markdown

LM2576S-ADJ

UMW · DC-DC Converters · TO-263-5

LM2576S-ADJ from UMW, in a TO-263-5. 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 VIN power_in Input supply voltage. Operating range 4.5V to 40V (60V for HV version); absolute maximum 45V (63V HV). Bypass with a 100µF, 75V aluminum electrolytic close to the pin.
2 Output output Switching output from the internal 3A power switch. Connects to the catch diode (e.g. MBR360/1N5822) and the buck inductor (typ. 100µH). Steady-state output voltage to ground rated to -1V min; switch saturation ~1.4V at 3A.
3 GND power_in Device ground. Use single-point grounding or a ground plane; return input and output capacitor grounds here to minimize switching-loop area.
4 Feedback input Output voltage feedback input to the internal error amplifier. Internal reference VREF = 1.23V; set output with VOUT = VREF*(1 + R2/R1), R1 between 1k and 5k. Feedback bias current 50nA typ (100/500nA max).
5 ON/OFF input Active-low shutdown input; regulator is ON with pin low or floating and OFF with pin high. VIH >= 2.2V (min) to shut down, VIL <= 1.0V (max) for ON. Input voltage limited to -0.3V <= V <= VIN; standby current ~50µA when off.

Key specifications

Parameter Value
Manufacturer UMW
Package TO-263-5
Category PMIC
Pins 5

Ordering variants

  • LM2576S-ADJ
  • LM2576S-ADJLM2576HVS-ADJ
  • LM2576S-ADJLM2576T-ADJ
  • LM2576S-ADJLM2576HVT-ADJ

CAD (KiCad official)

  • Symbol: LM2576S-ADJ
  • Footprint: Package_TO_SOT_SMD:TO-263-5_TabPin6
  • 3D model: TO-263-5 (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: UMW datasheet (None pp, sha256 10275fb18a78ad8b, 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

Symbol & Footprint

Schematic Symbol

Open full view ↗

PCB Footprint

Open full view ↗