component
ZLDO1117QG33TA
Public Made by Adomby adom
Diodes Incorporated Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.
3D Model
Open in new tab ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
PCB Footprint
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
Datasheet
Open in new tab ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
Contents
README
markdownZLDO1117QG33TA
Diodes Incorporated · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223
ZLDO1117QG33TA from Diodes Incorporated, in a SOT-223. 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 | ADJ/GND | power_in | Ground pin for the fixed-mode (3.3V) variant ZLDO1117QG33TA. In adjustable variants, a resistor divider from this pin to VOUT sets the output voltage; for the fixed 3.3V version this pin is tied to system ground. |
| 2 | VOUT | power_out | Regulated 3.3V output (2% tolerance, up to 1A). A minimum 4.7uF capacitor (0.05Ω <= ESR <= 0.5Ω) must be connected from this pin to ground to ensure stability. A larger output capacitor is recommended for improved AC load response. Also connected to the exposed tab. |
| 3 | VIN | power_in | Input supply pin (-0.03V to +18V absolute max; 2.7V to 18V recommended). Typically a large storage capacitor (0.05Ω <= ESR <= 0.5Ω) is connected from this pin to ground to keep the input from sagging below the minimum dropout voltage during load transients. VIN must remain at least 1.3V above VOUT (1.5V for correct operation) for the device to regulate properly. |
| TAB | VOUT (Tab) | power_out | Exposed metal tab electrically connected to VOUT. Used as the primary thermal path; solder to a copper heat-spreading pad on the PCB. Theta_JC = 16 °C/W and Theta_JA = 107 °C/W for SOT-223. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| Package | SOT-223 |
| Category | PMIC |
| Pins | 4 |
Ordering variants
Same part, different packaging or reel option.
ZLDO1117QG33TAZLDO1117QK33TC
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 (+25°C) | VOUT | 3.267 | 3.3 | 3.333 | V | IO = 10mA, VIN = 5.3V | 4 |
| Output Voltage (FT) | VOUT | 3.235 | 3.365 | V | 0 < IO < 1A, 4.7V < VIN < 12V | 4 | |
| Line Regulation (+25°C) | 0.1 | % | IO = 0mA, VOUT + 1.5V < VIN < 12V | 4 | |||
| Line Regulation (FT) | 0.2 | % | IO = 0mA, VOUT + 1.5V < VIN < 12V, FT | 4 | |||
| Load Regulation (+25°C) | 6.6 | mV | VIN = 4.8V, 0 < IO < 1A | 4 | |||
| Load Regulation (FT) | 13 | mV | VIN = 4.8V, 0 < IO < 1A, FT | 4 | |||
| Dropout Voltage | VIN - VOUT | 1.11 | 1.2 | V | IO = 1A, ΔVOUT = 1%VOUT | 4 | |
| Quiescent Current (FT) | 4 | 10 | mA | VIN < 18V, IO = 0mA, FT | 4 | ||
| Thermal Regulation | 0.1 | %/W | 30ms pulse, +25°C | 4 | |||
| Ripple Rejection | 60 | 80 | dB | VIN = VOUT + 3V, f = 120Hz, COUT = 25µF Tantalum, IOUT = 100mA | 4 | ||
| Input Voltage (recommended) | VIN | 2.7 | 18 | V | 3 | ||
| Output Current (recommended) | IO | 0.01 | 1 | A | 3 | ||
| Operating Junction Temperature Range | TJ | -40 | 125 | °C | 3 | ||
| Operating Ambient Temperature Range | TA | -40 | 105 | °C | 3 | ||
| Input Supply Voltage (absolute maximum) | VIN | -0.03 | 18 | V | Relative to Ground | 2 | |
| Junction Temperature (absolute maximum) | TJ | 150 | °C | 2 | |||
| Storage Temperature | TST | -65 | 150 | °C | 2 | ||
| ESD Susceptibility HBM | HBM | 4000 | V | Human Body Model | 2 | ||
| ESD Susceptibility MM | MM | 400 | V | Machine Model | 2 | ||
| ESD Susceptibility CDM | CDM | 1000 | V | Charged Device Model | 2 | ||
| Junction-to-Ambient Thermal Resistance (SOT223) | θJA | 107 | °C/W | Note 9: TA = +27°C, no air flow, 2oz copper, 5.6mm x 5.6mm pad | 3 | ||
| Junction-to-Case Thermal Resistance (SOT223) | θJC | 16 | °C/W | Note 9: TA = +27°C, no air flow, 2oz copper, 5.6mm x 5.6mm pad | 3 | ||
| Temperature Stability | 0.5 | % | IO = 10mA | 4 |
CAD (KiCad official)
- Symbol:
ZLDO1117QG33TA - Footprint:
Package_TO_SOT_SMD:SOT-223-3_TabPin2 - 3D model: SOT-223 (KiCad packages3D, STEP)
- 3D model files:
zldo1117qg33ta-etched.step/zldo1117qg33ta-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);zldo1117qg33ta.step/zldo1117qg33ta.glbare the bare package body.
3D model downloads
Two STEP files. Same geometry, different body top:
| File | Size | Use it when |
|---|---|---|
zldo1117qg33ta.step |
64 KB | You want the bare part, or you mark your own boards. |
zldo1117qg33ta-etched.step |
2.1 MB | You want the part with ZLDO1117QG33TA already on it. |
The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 525 faces against 75 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Diodes Incorporated datasheet (14 pp, sha256
52a05840bdb17cd6, 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).