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xl2596s-3-3e1

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XLSEMI XL2596S 3 3E1 DC-DC Converters, TO-263-5. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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XL2596S-3.3E1

XLSEMI XL2596S 3 3E1 · DC-DC Converters · TO-263-5

XL2596S-3.3E1 from XLSEMI XL2596S 3 3E1, 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 Supply voltage input pin. Operates from 4.5 V to 40 V DC (absolute max 45 V). Bypass to GND with a suitably large capacitor (e.g. 470 uF/35 V CIN in parallel with a 1 uF/105 ceramic) placed close to the pin to eliminate input noise.
2 OUTPUT output Power switch output pin (SW). Internal power transistor emitter/switch node that supplies power to the external L-C filter. Saturation voltage typ 1.3 V (max 1.5 V) at 3 A, switch current limit 3.6/4.8/6.9 A. Connect to the Schottky catch diode cathode and the output inductor.
3 GND power_in Ground pin. Must be placed outside of the Schottky diode-to-output-capacitor ground path to prevent switching-current spikes from injecting voltage noise into the XL2596. The TO-263-5L metal tab is also tied to GND for thermal dissipation.
4 FEEDBACK input Feedback pin (FB). Senses the output voltage through an external resistor divider and regulates against an internal 1.23 V reference. For the fixed 3.3 V version the divider is internal (R1=2.5 k, R2=4.2 k) so this pin is tied directly to the output; VFB abs-max is -0.3 V to Vin.
5 ON/OFF input Enable pin with hysteresis. Drive LOW (<0.8 V) to turn the regulator ON, HIGH (>1.4 V) to turn it OFF; floating defaults LOW (ON). Input leakage ~0.2 uA at 0.5 V (ON), ~5 uA at 2.5 V (OFF); shutdown supply current typ 80 uA. TTL-compatible.

Key specifications

Parameter Value
Manufacturer XLSEMI XL2596S 3 3E1
Package TO-263-5
Category PMIC
Pins 5

Ordering variants

  • XL2596S-3.3E1
  • XL2596S-3.3E1S-ADJE1
  • XL2596S-3.3E1S-5.0E1
  • XL2596S-3.3E1S-12E1
  • XL2596S-3.3E1T-3.3E1
  • XL2596S-3.3E1T-ADJE1
  • XL2596S-3.3E1T-5.0E1
  • XL2596S-3.3E1T-12E1

CAD (KiCad official)

  • Symbol: XL2596S-3.3E1
  • 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: XLSEMI XL2596S 3 3E1 datasheet (None pp, sha256 c2a385c60d33d0a3, retrieved 2026-08-17, tier: manufacturer)
  • 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

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Datasheet

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