component
LM2596SX-ADJ
Public Unreviewedby Ray
Texas Instruments DC-DC Converters, TO-263-5. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownLM2596SX-ADJ
Texas Instruments · DC-DC Converters · TO-263-5
LM2596SX-ADJ from Texas Instruments, 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 | Unregulated DC input supply, 4.5 V to 40 V (45 V absolute max). Bypass with a low-ESR bulk capacitor (e.g. 680 µF) close to the pin to handle the switching current. |
| 2 | Output | output | Switching output from the internal power switch. Connects to the catch diode cathode and the input side of the output inductor. Drives up to 3 A at the switching frequency of 150 kHz. |
| 3 | GND | power_in | Device ground reference. Also tied internally to the exposed metal tab of the TO-263 package for heat sinking. |
| 4 | Feedback | input | Feedback sense input for the internal error amplifier. Regulates the pin to VFB = 1.230 V (typ) via an external resistor divider from VOUT that sets the output voltage from 1.2 V to 37 V. Absolute range −0.3 V to +25 V; input bias current ~10 nA (50 nA max). |
| 5 | ON/OFF | input | Active-low TTL shutdown input. Pull LOW (<0.6 V) to enable regulation; drive HIGH (>2.0 V, up to 25 V) to place the device in standby (~80 µA typ, 250 µA max). Tie directly to GND if the shutdown function is unused. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | TO-263-5 |
| Category | PMIC |
| Pins | 5 |
Ordering variants
Same part, different packaging or reel option.
LM2596SX-ADJLM2596SX-ADJSLM2596SX-ADJT
CAD (KiCad official)
- Symbol:
LM2596SX-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: Texas Instruments datasheet (42 pp, sha256
fb1a427d7e1fb607, 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).