component
PAM2421AECADJR
Public Unreviewedby Ray
Diodes Incorporated DC-DC Converters, SOIC-8-EP. 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
markdownPAM2421AECADJR
Diodes Incorporated · DC-DC Converters · SOIC-8-EP
PAM2421AECADJR from Diodes Incorporated, in a SOIC-8-EP. 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 | PGND | power_in | Power ground. Return for the internal power MOSFET switch current; route with short, wide traces to the input bypass capacitor return. |
| 2 | IN | power_in | Supply input. Operating input voltage range 2.7V to 5.5V. Bypass locally to PGND with a low-ESR ceramic capacitor. |
| 3 | EN | input | Enable control input. Logic high (>=1.4V) enables the IC; logic low (<=0.4V) disables it (shutdown current ~0.1uA). Do not leave floating; tie to IN if unused. |
| 4 | COMP | output | Error amplifier compensation node. Connect an external RC network from this pin to AGND to set the loop compensation. |
| 5 | AGND | power_in | Analog ground. Reference for the internal analog circuitry; connect to PGND at a single quiet point. |
| 6 | FB | input | Feedback input. Connect a resistor divider from VOUT to FB to AGND to program the output voltage. FB is regulated to 1.262V; FB input current typ 0nA (80nA max). |
| 7 | SS | passive | Soft-start control input. A capacitor (e.g. 10nF) from SS to ground programs the soft-start ramp; charged by a 4.5uA internal current source. Discharged to ground in shutdown; may be left floating if soft-start is not needed. |
| 8 | SW | power_out | Switch output; drain of the internal power MOSFET. Connect to the boost inductor and Schottky rectifier anode. Rated to +28V absolute maximum; keep trace short and away from sensitive nodes to minimize EMI. |
| 9 | EP | power_in | Exposed thermal pad on package underside. Must be connected to ground for proper thermal performance. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| Package | SOIC-8-EP |
| Category | PMIC |
| Pins | 9 |
Ordering variants
Same part, different packaging or reel option.
PAM2421AECADJR
CAD (KiCad official)
- Symbol:
PAM2421AECADJR - Footprint:
Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm - 3D model: SOIC-8-EP (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Diodes Incorporated datasheet (10 pp, sha256
a1cb3234ac92d092, 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).