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ZLDO1117QK50TC
Public Unreviewedby Ray
Diodes Incorporated Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-252. 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
markdownZLDO1117QK50TC
Diodes Incorporated · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-252
ZLDO1117QK50TC from Diodes Incorporated, in a TO-252. 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 | GND | power_in | Ground reference pin for the fixed-output ZLDO1117Q-50 variant. On adjustable variants this same pin is the ADJ feedback node; on this 5.0V fixed-mode part it is tied internally to the reference divider and must be connected to system ground. |
| 2 | VOUT | power_out | Regulated 5.0V output of the LDO, capable of sourcing up to 1A. Requires a minimum 4.7µF capacitor to ground (0.05Ω ≤ ESR ≤ 0.5Ω) for stability; a larger output capacitor improves AC load response. The exposed tab is also VOUT. |
| 3 | VIN | power_in | Input supply pin, 2.7V to 18V. A large storage capacitor (0.05Ω ≤ ESR ≤ 0.5Ω) should be placed close to this pin so the input does not sag below the minimum dropout during load transients. VIN must be at least ~1.3V above VOUT for proper regulation (6.3V minimum for 5.0V output at full load). |
| TAB | VOUT | power_out | Exposed thermal tab electrically tied to VOUT. Solder to the PCB copper pour associated with the output net to conduct heat and improve power dissipation (θJA = 73 °C/W, θJC = 12 °C/W for TO252). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| Package | TO-252 |
| Category | PMIC |
| Pins | 4 |
Ordering variants
Same part, different packaging or reel option.
ZLDO1117QK50TCZLDO1117QG50TA
CAD (KiCad official)
- Symbol:
ZLDO1117QK50TC - Footprint:
Package_TO_SOT_SMD:TO-252-2 - 3D model: TO-252 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Diodes Incorporated datasheet (14 pp, sha256
52a05840bdb17cd6, 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).