component
LDK120M33R
Public Unreviewedby Ray
STMicroelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-23-5L. 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
markdownLDK120M33R
STMicroelectronics · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-5L
LDK120M33R from STMicroelectronics, in a SOT-23-5L. 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 | IN | power_in | Input supply voltage to the LDO. Operating range 1.9 V to 5.5 V (absolute max -0.3 V to +7 V). Typically bypassed with a 1 µF ceramic capacitor to GND. |
| 2 | GND | power_in | Common ground reference for the device. All voltages in the datasheet are referred to this pin. |
| 3 | EN | input | Enable logic input. Low (<=0.4 V) puts the LDO into shutdown (<1 µA); High (>=1.2 V) enables the regulator. Input current ~100 nA. Absolute max -0.3 V to VIN+0.3 V. |
| 4 | BYP | passive | Bypass capacitor pin for noise reduction on the fixed-output version. A 10 nF ceramic capacitor from BYP to GND reduces output noise (typ. 51 µVRMS with CBYP vs 148 µVRMS without). Optional - if unused, leave floating with no PCB routing. Absolute max 2 V. |
| 5 | OUT | power_out | Regulated 3.3 V output (±2% at 25 °C, ±3% over -40 °C to 125 °C). Delivers up to 200 mA. Requires a 1 µF (up to 22 µF) ceramic output capacitor for stability. Internally current-limited (~400 mA short-circuit) and thermally protected (160 °C shutdown). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | SOT-23-5L |
| Category | PMIC |
| Pins | 5 |
Ordering variants
Same part, different packaging or reel option.
LDK120M33RLDK120C33RLDK120PU33R
CAD (KiCad official)
- Symbol:
LDK120M33R - Footprint:
Package_TO_SOT_SMD:SOT-23-5 - 3D model: SOT-23-5L (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: STMicroelectronics datasheet (None pp, sha256
1684d802fa69801e, 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).