component
BCT1812EUK-TR
Public Made by Adomby adom
BROADCHIP DC-DC Converters, SOT-23-5. Pinout cross-checked by two models against the datasheet, 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
markdownBCT1812EUK-TR
BROADCHIP · DC-DC Converters · SOT-23-5
BCT1812EUK-TR from BROADCHIP, in a SOT-23-5. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | EN | input | Drive EN high to turn on the regulator and low to turn off the regulator; EN rising threshold is 1.5V (typ) and falling threshold is 0.4V (typ). |
| 2 | GND | power_in | Power ground pin. |
| 3 | SW | output | Power switching output that connects the inductor to the drains of the internal high-side PMOS and low-side NMOS. |
| 4 | VIN | power_in | Power supply input with a 2.5V to 5.5V input voltage range, which must be closely decoupled to GND with a 4.7µF or greater ceramic capacitor. |
| 5 | FB | input | Output feedback pin that senses the output voltage and is regulated by the control loop to 0.6V (VFB 0.585V to 0.615V), with a resistive divider connected at FB. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | BROADCHIP |
| Package | SOT-23-5 |
| Category | Power Supply Chip |
| Pins | 5 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| VIN Input Supply Voltage | VIN | 2.5 | 5.5 | V | 4 | ||
| Feedback Voltage | VFB | 0.585 | 0.6 | 0.615 | V | 4 | |
| Input Supply Voltage (absolute maximum) | -0.3 | 6.5 | V | 3 | |||
| EN, FB, SW pin voltage | -0.3 | V | maximum printed as VIN+0.3V | 3 | |||
| Storage Temperature Range | -65 | 150 | ℃ | 3 | |||
| Junction Temperature | 150 | ℃ | 3 | ||||
| Operating Temperature Range | -40 | 85 | ℃ | 3 | |||
| VIN UVLO Threshold | VIN_MIN | 2.4 | V | VIN Rising | 4 | ||
| VIN Under Voltage Lockout Threshold Hysteresis | VIN_MIN_HYST | 200 | mV | VIN Falling | 4 | ||
| Shutdown Supply Current | ISD | 1 | uA | VEN=0V | 4 | ||
| Supply Current | IQ | 40 | uA | VEN=5V, VFB=0.63V | 4 | ||
| Top Switch On-Resistance | RDS(ON)T | 200 | mΩ | 4 | |||
| Bottom Switch On-Resistance | RDS(ON)B | 150 | mΩ | 4 | |||
| Switch Frequency | FSW | 1.5 | MHz | 4 | |||
| Top Switch Current Limit | ILIM_TOP | 1.8 | A | 4 | |||
| Max Duty Cycle | 100 | % | 4 | ||||
| Minimum On Time | TON_MIN | 100 | ns | 4 | |||
| EN Rising threshold voltage | VEN_H | 1.5 | V | VEN rising | 4 | ||
| EN Falling threshold | VEN_L | 0.4 | V | VEN falling | 4 | ||
| EN Input current | IIN | 1 | uA | VEN = 0V to VIN | 4 | ||
| Soft-Start Time | tSS | 1 | ms | 4 | |||
| Thermal Shutdown Temperature | TSD | 160 | ℃ | 4 | |||
| Thermal Shutdown Hysteresis | THYS | 15 | ℃ | 4 |
CAD (KiCad official)
- Symbol:
BCT1812EUK-TR - Footprint:
Package_TO_SOT_SMD:SOT-23-5 - 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files:
bct1812euk-tr-etched.step/bct1812euk-tr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bct1812euk-tr.step/bct1812euk-tr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: BROADCHIP datasheet (8 pp, sha256
916f30d27c5fe20a, retrieved 2026-10-18, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).