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XH2576-3.3

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XINLUDA DC-DC Converters, TO-263-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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XH2576-3.3

XINLUDA · DC-DC Converters · TO-263-5

XH2576-3.3 from XINLUDA, in a TO-263-5. 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 VIN power_in Supply input pin to the collector of the high-side transistor; connect to the power supply and input bypass capacitor CIN, keeping the VIN to CIN and GND path as short as possible.
2 OUTPUT output Emitter of the power transistor and switching node; attach to the inductor and the cathode of the external diode.
3 GROUND power_in Ground pin; the path to CIN must be as short as possible.
4 FEEDBACK input Feedback sense input; connect to the midpoint of the feedback divider to set VOUT for the ADJ version, or connect directly to the output capacitor for fixed output versions.
5 ON/OFF input Enable input to the regulator: high = OFF, low = ON; connect to GND to enable the regulator and do not leave this pin floating.
6 EP passive Exposed pad (from the footprint; not named in the datasheet pin table).

Key specifications

Parameter Value
Manufacturer XINLUDA
Package TO-263-5
Category Power Management ICs
Pins 6

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Output voltage VOUT 3.234 3.3 3.366 V VIN = 12 V, ILOAD = 0.5 A 4
Output voltage VOUT 3.168 3.3 3.432 V TJ = 25 C, 6 V <= VIN <= 40 V, 0.5 A <= ILOAD <= 3 A 4
Output voltage VOUT 3.135 3.465 V Applies over full operating temperature range, 6 V <= VIN <= 40 V, 0.5 A <= ILOAD <= 3 A 4
Oscillator frequency fO 47 52 58 kHz TJ = 25 C 5
Oscillator frequency fO 42 63 kHz Applies over full operating temperature range 5
Saturation voltage VSAT 1.4 1.8 V IOUT = 3 A, TJ = 25 C 6
Saturation voltage VSAT 2 V IOUT = 3 A, applies over full operating temperature range 6
DC max duty cycle (ON) 93 98 % 6
Current limit ICL 4.2 5.8 6.9 A TJ = 25 C 6
Current limit ICL 3.5 7.5 A Applies over full operating temperature range 6
Output leakage current IL 2 7.5 mA Output = 0 V 6
Output leakage current IL 7.5 30 mA Output = -1 V 6
Quiescent current IQ 5 10 mA 6
Standby quiescent current ISTBY 50 200 uA ON/OFF Pin = 5 V (OFF) 6
ON/OFF pin logic input level high VIH 2.2 V VOUT = 0 V, TJ = 25 C 6
ON/OFF pin logic input level high VIH 1.4 2.4 V VOUT = 0 V, applies over full operating temperature range 6
ON/OFF pin logic input level low VIL 1.2 V VOUT = Nominal Output Voltage, TJ = 25 C 6
ON/OFF pin logic input level low VIL 0.8 V VOUT = Nominal Output Voltage, applies over full operating temperature range 6
ON/OFF pin input current high IIH 12 30 uA ON/OFF Pin = 5 V (OFF) 6
ON/OFF pin input current low IIL 0 10 uA ON/OFF Pin = 0 V (ON) 6
Operating temperature -40 125 C Recommended operating junction temperature range 3
Supply voltage 40 V 3
Maximum supply voltage 45 V XH2576 3
ON/OFF pin input voltage -0.3 V -0.3 V <= V <= +VIN 3
Output voltage to ground (steady-state) -1 V Steady-state 3
ESD human-body model V(ESD) -2000 2000 V HBM, per ANSI/ESDA/JEDEC JS-001 3
Maximum junction temperature TJ 150 C 3
Storage temperature Tstg -65 150 C 3
Junction-to-ambient thermal resistance RthetaJA 42.6 C/W TO-263 3
Junction-to-case (top) thermal resistance RthetaJC(top) 43.3 C/W TO-263 3
Junction-to-board thermal resistance RthetaJB 22.4 C/W TO-263 3
Junction-to-top characterization parameter psiJT 10.7 C/W TO-263 3
Junction-to-board characterization parameter psiJB 21.3 C/W TO-263 3
Junction-to-case (bottom) thermal resistance RthetaJC(bot) 0.4 C/W TO-263 3

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 Figure 26 and Figure 32). For the TO-263 style package, both the tab and pin 3 are ground and either connection may be used, as they are both part of the same copper lead frame 19

CAD (KiCad official)

  • Symbol: XH2576-3.3
  • Footprint: Package_TO_SOT_SMD:TO-263-5_TabPin6
  • 3D model: TO-263-5 (KiCad packages3D, STEP)
  • 3D model files: xh2576-3-3-etched.step / xh2576-3-3-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); xh2576-3-3.step / xh2576-3-3.glb are the bare package body.

Provenance

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

  • Datasheet: XINLUDA datasheet (22 pp, sha256 e5e68f874b1bfac3, retrieved 2026-10-27, 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