component
BD9E302EFJ-E2
Public Unreviewedby Ray
ROHM DC-DC Converters, HTSOP-8-EP. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
Open in new tab ↗
Loads on click. Unloads when scrolled away or the tab is hidden.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads on click. Unloads when scrolled away or the tab is hidden.
PCB Footprint
Open full view ↗Loads on click. Unloads when scrolled away or the tab is hidden.
Datasheet
Open in new tab ↗Loads on click. Unloads when scrolled away or the tab is hidden.
README
markdownBD9E302EFJ-E2
ROHM · DC-DC Converters · HTSOP-8-EP
BD9E302EFJ-E2 from ROHM, in a HTSOP-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 | BOOT | passive | Bootstrap capacitor terminal for high-side MOSFET gate drive. Connect a 0.1 uF ceramic capacitor between BOOT and SW; the capacitor voltage becomes the gate-drive rail for the high-side MOSFET. |
| 2 | VIN | power_in | Power supply input for the switching regulator and internal control circuits. Operating range 7.0 V to 28 V (absolute max +30 V). A 10 uF + 0.1 uF ceramic input capacitor is recommended. |
| 3 | EN | input | Enable input. Low level (<=0.8 V) forces shutdown mode; high level (>=2.5 V) enables the device. Must be driven (not left floating). Typical EN input current 4 uA at VEN=3 V. |
| 4 | AGND | power_in | Analog ground reference for the internal control circuitry. Should be tied to the system ground plane at a low-noise point separate from the switching (PGND) return. |
| 5 | FB | input | Feedback / inverting input to the gm error amplifier. Internal reference is 0.800 V (typ); an external resistor divider from VOUT sets the output voltage. Input current +/-1 uA max. |
| 6 | COMP | output | Error-amplifier output / current-comparator input. Connect an R-C phase-compensation network to AGND here to set the loop response. |
| 7 | PGND | power_in | Power ground return for the output stage (low-side MOSFET source). Carries the switching return current; route as a low-impedance plane to the input capacitor negative terminal. |
| 8 | SW | power_out | Switch node: source of the internal high-side MOSFET and drain of the low-side MOSFET. Connect the power inductor here and the 0.1 uF bootstrap capacitor to BOOT. Rated -0.5 V to VIN+0.3 V. |
| 9 | E-Pad | power_in | Exposed thermal pad on package underside. Solder to the PCB ground plane using multiple thermal vias for heat dissipation; electrically tied to internal ground. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | ROHM |
| Package | HTSOP-8-EP |
| Category | PMIC |
| Pins | 9 |
Ordering variants
Same part, different packaging or reel option.
BD9E302EFJ-E2
CAD (KiCad official)
- Symbol:
BD9E302EFJ-E2 - Footprint:
Package_SO:HTSOP-8-1EP_3.9x4.9mm_P1.27mm_EP2.4x3.2mm - 3D model: HTSOP-8-EP (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: ROHM datasheet (43 pp, sha256
d4f722bb50e05130, 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).