component
ap3125aktr-g1
Public Unreviewedby Ray
Diodes Incorporated AC-DC Controllers and Regulators, SOT-26. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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README
markdownAP3125AKTR-G1
Diodes Incorporated · AC-DC Controllers and Regulators · SOT-26
AP3125AKTR-G1 from Diodes Incorporated, in a SOT-26. 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 | GND | power_in | Signal ground. Current return for driver and control circuits. |
| 2 | FB | input | Feedback input directly connected to opto-coupler. Input impedance ~15kΩ, sources ~0.27mA when pulled low; controls peak inductor current via IPK=(VFB-0.8)/(3·RS). VFB>4.5V for ~70ms triggers OLP hiccup; VFB<1.55V stops drive pulses (zero-duty threshold). Green-mode threshold ~2.1V. |
| 3 | CTRL | bidirectional | Latch trigger pin. Sources ~100μA; low-threshold trigger 1V (typ) and high-threshold trigger 3V (typ) invoke latch protection. Leave open if unused; connect an NTC thermistor to GND for external OTP protection. Max sourcing current must be limited below 5mA. |
| 4 | SENSE | input | Current sense input for primary MOSFET source current. Max sense voltage 0.95V (typ) with VFB=4.5V; FOCP threshold 1.7V (typ) with ~100ns delay; internal 250ns leading-edge blanking. Requires small RC filter/series resistor to protect against turn-off undershoot beyond -0.3V. |
| 5 | VCC | power_in | Supply voltage of driver and control circuits. Recommended 10-25V; UVLO(on)=15.8V typ, UVLO(off)=7.6V typ, VCC maintain ~9.1V, VCC OVP ~28.5V, internal clamp ~34V, absolute max 30V. Startup current ~1μA typ; operating current ~0.7-1.2mA. |
| 6 | GATE | output | Gate driver output for external power MOSFET. Output clamping voltage ~13V (typ), rise time ~150ns and fall time ~50ns into 1nF at VCC=13V, max output current 350mA. Max duty cycle 75% typ. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| Package | SOT-26 |
| Category | PMIC |
| Pins | 6 |
Ordering variants
AP3125AKTR-G1AP3125AKTR-G1VKTR-G1AP3125AKTR-G1LKTR-G1AP3125AKTR-G1RKTR-G1
CAD (KiCad official)
- Symbol:
AP3125AKTR-G1 - Footprint:
Package_TO_SOT_SMD:SOT-23-6 - 3D model: SOT-26 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Diodes Incorporated datasheet (None pp, sha256
5c4b09361eff7f55, 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).