component
AP3428WT-7
Public Made by Adomby adom
Diodes Incorporated DC-DC Converters, TSOT-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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Contents
README
markdownAP3428WT-7
Diodes Incorporated · DC-DC Converters · TSOT-25
AP3428WT-7 from Diodes Incorporated, in a TSOT-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 | EN | input | Enable control input: forcing the pin above 1.5V enables the chip and below 0.4V shuts the device down. |
| 2 | GND | power_in | Ground pin. |
| 3 | LX | output | Drains of the internal main and synchronous power MOSFETs (switch node); LX is rated -0.3 to VIN+0.3 V, or -3 V to 7 V for less than 40 ns. |
| 4 | VIN | power_in | Bias supply and chip main power supply pin, operating over 2.5 V to 5.5 V. |
| 5 | FB | input | Feedback voltage input to the internal error amplifier, with a threshold voltage of 0.6 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| Package | TSOT-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 | VIN | -0.3 | 6 | V | 4 | ||
| EN Pin Voltage | VEN | -0.3 | V | 4 | |||
| LX Pin Voltage | VLX | -0.3 | V | 4 | |||
| LX Pin Voltage | VLX | -3 | 7 | V | <40ns | 4 | |
| Feedback Pin Voltage | VFB | -0.3 | V | 4 | |||
| Power Dissipation (TSOT25 (Type SM)) | PD | 0.4 | W | on PCB, TA = +25°C | 4 | ||
| Thermal Resistance Junction to Ambient (TSOT25 (Type SM)) | θJA | 220 | °C/W | 4 | |||
| Thermal Resistance Junction to Case (TSOT25 (Type SM)) | θJC | 130 | °C/W | Simulation | 4 | ||
| Operating Junction Temperature | TJ | 155 | °C | 4 | |||
| Storage Temperature | TSTG | -55 | 150 | °C | 4 | ||
| ESD (Machine Model) | VMM | 200 | V | Machine Model | 4 | ||
| ESD (Human Body Model) | VHBM | 2000 | V | Human Body Model | 4 | ||
| ESD (Charge Device Mode) | VCDM | 1000 | V | Charge Device Mode | 4 | ||
| Supply Voltage | VIN | 2.5 | 5.5 | V | 4 | ||
| Junction Temperature Range | TJ | -40 | 125 | °C | 4 | ||
| Operating Ambient Temperature | TA | -40 | 85 | °C | 4 | ||
| Input Voltage Range | VIN | 2.5 | 5.5 | V | 5 | ||
| Output Voltage Range | VOUT | 0.6 | V | 5 | |||
| Shutdown Current | ISD | 0.1 | 1 | µA | VEN = 0V | 5 | |
| Regulated Feedback Voltage | VFB | 0.588 | 0.6 | 0.612 | V | 5 | |
| FB Leakage Current | IFB | 0.2 | µA | VFB = 1V | 5 | ||
| Peak Inductor Current | ILIM | 1.3 | A | 5 | |||
| EN Threshold High | VENH | 1.5 | V | 5 | |||
| EN Threshold Low | VENL | 0.4 | V | 5 | |||
| EN Leakage Current | IEN | -1 | 1 | µA | VIN = VEN = 5V | 5 | |
| Input UVLO Threshold | VUVLO | 2.4 | 2.7 | V | 5 |
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 - Mate Tin Plated Leads, Solderable per MIL-STD-202, Method 208 Weight: 0.014 grams (Approximate) | 14 |
CAD (KiCad official)
- Symbol:
AP3428WT-7 - Footprint:
Package_TO_SOT_SMD:TSOT-23-5 - 3D model: TSOT-25 (KiCad packages3D, STEP)
- 3D model files:
ap3428wt-7-etched.step/ap3428wt-7-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ap3428wt-7.step/ap3428wt-7.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Diodes Incorporated datasheet (14 pp, sha256
f45194b4df69c4b8, retrieved 2026-10-18, 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).