component
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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Contents
README
markdownBD33KA5FP-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-E2BD33KA5FP-E2WFP-E2BD33KA5FP-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.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bd33ka5fp-e2.step/bd33ka5fp-e2.glbare 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).
Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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