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bd33ka5fp-e2

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ROHM Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-252-2(DPAK). Datasheet-verified pinout, KiCad symbol/footprint/3D.

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bd33ka5fp-e2-etched.step bd33ka5fp-e2: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain S… · Ray 23d ago
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README.md bd33ka5fp-e2: specified limits as data (metadata.characteristics, 22 rows from the datasheet) · Ray 25d ago

BD33KA5FP-E2

ROHM · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-252-2(DPAK)

BD33KA5FP-E2 from ROHM, in a TO-252-2(DPAK). 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 Vcc power_in Input power supply. Recommended operating range 2.3V to 5.5V (absolute max 7.0V). Attach a decoupling capacitor (≥1μF ceramic) between Vcc and GND close to the pin.
2 N.C. unconnected Not connected on the BDxxKA5FP TO252-3 no-switch variant. Datasheet explicitly notes 'N.C.(2PIN)' for BDxxKA5FP. Leave floating or tie to GND for mechanical support.
3 Vo power_out Regulated 3.3V output, up to 500mA peak. Attach a ≥1μF low-ESR ceramic (X5R/X7R) anti-oscillation capacitor between Vo and GND. Load regulation typ. 25mV (Io=0→500mA); line regulation typ. 10mV.
4 GND power_in Device ground, exposed on the TO252-3 heat-sink tab (FIN). Datasheet explicitly notes 'GND(FIN)' for BDxxKA5FP. Solder to a wide copper ground plane for thermal dissipation (θja=104.2 ℃/W on a 70×70×1.6mm board with 7×7mm² copper).

Key specifications

Parameter Value
Manufacturer ROHM
Package TO-252-2(DPAK)
Category PMIC
Pins 4

Ordering variants

  • BD33KA5FP-E2
  • BD33KA5FP-E2WFP-E2
  • BD33KA5FP-E2WF-E2

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Output Voltage precision (general description) VOUT -1 1 % 1
Peak Output Current Io 500 mA 4
Dropout Voltage ΔVd 0.12 0.2 V Io=200mA, Vcc=0.95×Vo 4
Shut Down Current Isd 0 1 μA VCTL=0V, Io=0mA (OFFmode) 4
Bias Current Ib 350 550 μA Io=0mA 4
Line Regulation Reg.I 10 35 mV Vcc=Vo+0.5V→5.5V, Io=200mA 4
Load Regulation Reg.L 25 75 mV Io=0mA→500mA 4
Temperature Coefficient of Output Voltage Tcvo -100 100 ppm/℃ Io=5mA,Tj=0 to 125℃ 4
CTL ON Mode Voltage VCTLON 2 V ACTIVE MODE, Io=0mA 4
CTL OFF Mode Voltage VCTLOFF 0.8 V OFF MODE, Io=0mA 4
CTL Input Current ICTL 20 40 60 μA Io=0mA 4
Input Power Supply Voltage Vcc 2.3 5.5 V 4
Output Current Io 0 500 mA 4
Output Control Terminal Voltage VCTL 0 V 4
Power Supply Voltage Vcc -0.3 7 V 4
Output Control Terminal Voltage VCTL -0.3 V 4
Power Dissipation (TO252-3) Pd 1200 mW 70mm×70mm×1.6mm glass epoxy board; reduce by 9.6 mW/℃ over 25℃ 4
Operating Temperature Range Topr -40 105 ℃ 4
Ambient Storage Temperature Tstg -55 150 ℃ 4
Maximum Junction Temperature Tjmax 150 ℃ 4
Ripple Rejection R.R. 50 dB f=120Hz, ein=-10dBV, Io=100mA 4
Thermal resistance junction-to-ambient (TO252-3) θja 104.2 ℃/W Rohm standard board, 70×70×1.6mm, copper foil 7×7mm² 9

CAD (KiCad official)

  • Symbol: BD33KA5FP-E2
  • Footprint: Package_TO_SOT_SMD:TO-252-2
  • 3D model: TO-252-2(DPAK) (KiCad packages3D, STEP)
  • 3D model files: bd33ka5fp-e2-etched.step / bd33ka5fp-e2-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); bd33ka5fp-e2.step / bd33ka5fp-e2.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: ROHM datasheet (None pp, sha256 4a682178340031d0, 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).

Datasheet PDF