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ZLDO1117QKTC

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Diodes Incorporated Linear Voltage Regulators (LDO), TO-252. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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ZLDO1117QKTC

Diodes Incorporated · Linear Voltage Regulators (LDO) · TO-252

ZLDO1117QKTC from Diodes Incorporated, in a TO-252. 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 ADJ/GND power_in A resistor divider from this pin to the VOUT pin and ground sets the output voltage, and the pin is ground only for fixed-mode versions.
2 VOUT power_out The regulator output requires a minimum 4.7µF capacitor with 0.05Ω ≤ ESR ≤ 0.5Ω connected from this pin to ground for stability.
3 VIN power_in The input pin must always be at least 1.3V higher than VOUT for correct regulation, with an input supply voltage rating of -0.03 to +18 V relative to ground.

Key specifications

Parameter Value
Manufacturer Diodes Incorporated
Package TO-252
Category Power Management ICs
Pins 3

Electrical characteristics

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

Parameter Symbol Min Typ Max Unit Conditions Page
Input Voltage (recommended) VIN 2.7 18 V Note 5: VIN must be 1.5V greater than output voltage for correct operation 3
Output Current IO 0.01 1 A 3
Operating Junction Temperature Range TJ -40 125 °C Notes 6, 7 3
Operating Ambient Temperature Range TA -40 105 °C Notes 7, 8 3
Input Supply Voltage (Relative to Ground) VIN -0.03 18 V Relative to ground 2
Junction Temperature TJ 150 °C 2
Storage Temperature TST -65 150 °C 2
ESD Human Body Model HBM 4000 V Human Body Model 2
ESD Machine Model MM 400 V Machine Model 2
ESD Charged Device Model CDM 1000 V Charged Device Model 2
Reference Voltage (ADJ) 1.238 1.25 1.263 V ZLDO1117Q-ADJ; (VIN - VOUT) = 2V, IO = 10mA, TJ +25°C 4
Reference Voltage (ADJ), FT 1.225 1.275 V ZLDO1117Q-ADJ; VOUT + 1.4V < VIN < 10V, 10mA < IO < 1A, FT (-40°C to +125°C) 4
Line Regulation (ADJ) 0.1 % ZLDO1117Q-ADJ; IO = 10mA, VOUT + 1.5V < VIN < 12V, TJ +25°C 4
Line Regulation (ADJ), FT 0.2 % ZLDO1117Q-ADJ; IO = 10mA, VOUT + 1.5V < VIN < 12V, FT 4
Load Regulation (ADJ) 0.2 % ZLDO1117Q-ADJ; VIN = 3.3V, VADJ = 0, 10mA < IO < 1A, TJ +25°C 4
Load Regulation (ADJ), FT 0.4 % ZLDO1117Q-ADJ; VIN = 3.3V, VADJ = 0, 10mA < IO < 1A, FT 4
Dropout Voltage 1.11 1.2 V ZLDO1117Q-ADJ; IO = 1A, ΔVOUT = 1%VOUT, TJ +25°C 4
Current Limit 1.1 A ZLDO1117Q-ADJ; (VIN - VOUT) = 5V, FT 4
Minimum Load Current 2 5 mA ZLDO1117Q-ADJ; VIN < 18V, FT 4
GND Current 35 120 µA ZLDO1117Q-ADJ; VIN = 7V, FT 4
Thermal Regulation 0.1 %/W 30ms pulse, TJ +25°C 4
Junction-to-Ambient Thermal Resistance (TO252 DPAK) θJA 73 °C/W Note 10: TA = +27°C, no air flow, 2in x 2in polyimide PCB, 1oz copper, 2cm x 2cm pad 3
Junction-to-Case Thermal Resistance (TO252 DPAK) θJC 12 °C/W 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 tin • Terminals: Finish: Matte Tin Plated Leads, Solderable per M2003 JESD22-B102 • Weight: 13

CAD (KiCad official)

  • Symbol: ZLDO1117QKTC
  • Footprint: Package_TO_SOT_SMD:TO-252-2
  • 3D model: TO-252 (KiCad packages3D, STEP)
  • 3D model files: zldo1117qktc-etched.step / zldo1117qktc-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); zldo1117qktc.step / zldo1117qktc.glb are the bare package body.

Provenance

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

  • Datasheet: Diodes Incorporated datasheet (14 pp, sha256 52a05840bdb17cd6, retrieved 2026-10-28, tier: manufacturer)
  • 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