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AP139-33WG-7
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Diodes Incorporated Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-25. Pinout cross-checked by two models against the datasheet, 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
markdownAP139-33WG-7
Diodes Incorporated · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-25
AP139-33WG-7 from Diodes Incorporated, in a SOT-25. 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 | VIN | power_in | Power supply input; recommended operating range is 2.7V to 5.5V, and the absolute maximum input voltage is +6V. |
| 2 | GND | power_in | Ground reference pin; the output voltage is rated from GND - 0.3V to VIN + 0.3V. |
| 3 | EN | input | Enable pin that normally floats high; it must be above 1.7V (min) for output on and below 0.8V (max) to turn the output off, and pulling it low powers down the internal circuits. |
| 4 | BYP | passive | Bypass pin for the reference; in low-noise applications a 10nF capacitor is placed between BYP and GND. |
| 5 | VOUT | power_out | Regulated output, guaranteed at 300mA output current and requiring a low-ESR output capacitor of 1.0µF or greater to ground. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| Package | SOT-25 |
| Category | Power Management (PMIC) |
| Pins | 5 |
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 (absolute maximum) | VIN | 6 | V | 3 | |||
| Operating Junction Temperature Range (absolute maximum) | TOP | -40 | 125 | °C | 3 | ||
| Maximum Junction Temperature (absolute maximum) | TMJ | 150 | °C | 3 | |||
| Internal Power Dissipation (absolute maximum) | PD | 250 | mW | 3 | |||
| Input Voltage (recommended operating) | VIN | 2.7 | 5.5 | V | 3 | ||
| Output Current (recommended operating) | IOUT | 0 | 300 | mA | 3 | ||
| Operating Ambient Temperature (recommended operating) | TA | -40 | 85 | °C | 3 | ||
| Input Voltage | VIN | 5.5 | V | Note 5 | 3 | ||
| Quiescent Current | IQ | 45 | 60 | μA | IO = 0mA | 3 | |
| Standby Current | ISTB | 2 | 3 | μA | VIN = 5.0V, VOUT = 0V, VEN < VEL | 3 | |
| Output Voltage Accuracy | VOUT | -2 | 2 | % | IO = 1mA, VIN = 5V | 3 | |
| Dropout Voltage | VDROPOUT | 0.45 | V | IO = 1mA to 300mA; VOUT = VO(NOM) - 1.5%; VO 2.8V | 3 | ||
| Output Current | IOUT | 300 | mA | 3 | |||
| Current Limit | ILIMIT | 300 | 450 | mA | VOUT > 1.05V | 3 | |
| Short-Circuit Current | Ishort | 150 | 300 | mA | VCC = 5V, VOUT < 1.05V | 3 | |
| Line Regulation | ΔVLINE | 0.1 | 0.3 | % | IOUT = 1mA, VIN = (VOUT +1V) to 5.5V | 3 | |
| Load Regulation | ΔVLOAD | 0.3 | 1 | % | IO = 1mA to 300mA, VIN = 5V | 3 | |
| EN Input Threshold (output ON) | VEH | 1.7 | V | Output ON | 3 | ||
| EN Input Threshold (output OFF) | VEL | 0.8 | V | Output OFF | 3 | ||
| Enable Pin Current | IEN | 0.1 | μA | 3 | |||
| Thermal Resistance Junction-to-Ambient | θJA | 226 | °C/W | SOT25 (Note 6) | 3 | ||
| Thermal Resistance Junction-to-Case | θJC | 34 | °C/W | SOT25 (Note 6) | 3 |
CAD (KiCad official)
- Symbol:
AP139-33WG-7 - Footprint:
Package_TO_SOT_SMD:SOT-23-5 - 3D model: SOT-25 (KiCad packages3D, STEP)
- 3D model files:
ap139-33wg-7-etched.step/ap139-33wg-7-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ap139-33wg-7.step/ap139-33wg-7.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Diodes Incorporated datasheet (9 pp, sha256
3a62d8fc55cf7dec, retrieved 2026-10-20, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-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).