component
BD90640EFJ-CE2
Public Unreviewedby Ray
ROHM DC-DC Converters, ESOP-8. 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
markdownBD90640EFJ-CE2
ROHM · DC-DC Converters · ESOP-8
BD90640EFJ-CE2 from ROHM, in a ESOP-8. 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 | RT | passive | Switching frequency setting resistor connection. Connect resistor R_RT (22 kΩ-330 kΩ) from RT to GND to set f_SW between 50 kHz and 600 kHz (≈27 kΩ → 500 kHz). Internal reference on RT is ≈0.8 V. |
| 2 | SW | power_out | Switching output. Drain of the integrated P-ch Power MOSFET (R_ON 0.16 Ω typ). Connect to the external inductor / catch diode node. Rated 4 A max output switch current for BD90640; withstands the full V_IN swing. |
| 3 | EN/SYNC | input | Enable / external clock synchronization input. IC is enabled when V_EN/SYNC > 2.6 V (typ threshold 1.9 V) and shut down when < 0.8 V. Also accepts an external clock to synchronize the internal oscillator within ±20 % of the RT-programmed frequency. Absolute max V_EN/SYNC ≤ V_IN. |
| 4 | GND | power_in | Ground reference for the IC. The HTSOP-J8 exposed thermal pad (backside) is also tied to GND and must be soldered to the PCB ground copper for thermal dissipation (P_D = 3.10 W on recommended board). |
| 5 | VC | output | Error amplifier output / loop compensation node. Connect external R-C phase-compensation network from VC to GND. Internal source/sink currents ±54 µA typ; g_m ≈ 270 µA/V. Absolute max 7 V. |
| 6 | VIN | power_in | Power supply input to the control circuitry. Operating range 3.5 V to 36 V (initial startup > 3.9 V), absolute max 42 V. Must be shorted to PVIN (pin 7) externally per Note 1. |
| 7 | PVIN | power_in | Power stage supply input feeding the source of the integrated P-ch Power MOSFET. Must be tied to VIN (pin 6) externally. Bypass with a low-ESR ceramic capacitor (≥2.4 µF effective) close to the pin. |
| 8 | FB | input | Output voltage feedback input to the error amplifier. Regulated to V_REF = 0.800 V (±2 % over −40 °C to +125 °C). Set output voltage with a resistor divider from V_O to FB to GND. Input bias current ±1 µA max; absolute max 7 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | ROHM |
| Package | ESOP-8 |
| Category | PMIC |
| Pins | 8 |
Ordering variants
Same part, different packaging or reel option.
BD90640EFJ-CE2BD90620EFJ-CE2BD90610EFJ-CE2BD90640HFP-CBD90620HFP-C
CAD (KiCad official)
- Symbol:
BD90640EFJ-CE2 - Footprint:
Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm - 3D model: ESOP-8 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: ROHM datasheet (43 pp, sha256
94ffa542eb12f492, 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).