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BCT2038EUK12-TR
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BROADCHIP Linear Voltage Regulators (LDO), SOT-23-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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BCT2038EUK12-TR
BROADCHIP · Linear Voltage Regulators (LDO) · SOT-23-5
BCT2038EUK12-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 | IN | power_in | Regulator input; supply voltage can range from 1.6V to 5.5V and the pin should be bypassed with a 1μF capacitor to GND. |
| 2 | GND | power_in | Ground reference pin for the regulator. |
| 3 | EN | input | Enable pin with an internal pull-down resistor; a logic low reduces the supply current to less than 1μA, and it must be connected to IN for normal operation. |
| 4 | BP | passive | Reference-noise bypass pin on the fixed-voltage version (this MPN is 1.2V fixed); bypass with a low-leakage 0.01μF ceramic capacitor placed very close to the pin for reduced output noise and high PSRR. |
| 5 | OUT | power_out | Regulator output. |
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 |
|---|---|---|---|---|---|---|---|
| Input Voltage | VIN | 1.6 | 5.5 | V | +25℃ | 5 | |
| Output Voltage Accuracy | -2.5 | 2.5 | % | IOUT = 0.1mA, +25℃ | 5 | ||
| Dropout Voltage (1.2V ≤ VOUT < 1.8V) | VDROP | 945 | 1280 | mV | IOUT = 500mA, +25℃ | 5 | |
| Line Regulation (VOUT < 1.8V or VOUT > 3.3V) | 0.01 | 0.1 | %/V | VIN = 1.6V or (VOUT + 0.5V) to 5.5V, IOUT = 1mA, +25℃ | 5 | ||
| Load Regulation | ΔVOUT | 12 | 40 | mV | IOUT = 0.1mA to 500mA, +25℃ | 5 | |
| Maximum Output Current | 500 | mA | +25℃, see Note 1 | 5 | |||
| Current Limit | ILIM | 560 | 800 | mA | +25℃ | 5 | |
| Short Current Limit | ISHORT | 320 | mA | VOUT = 0V, +25℃ | 5 | ||
| Ground Pin Current | IQ | 20 | 26 | µA | No Load, VEN = VIN, +25℃ | 5 | |
| Power Supply Rejection Ratio (f = 217Hz, CBP = 0µF) | PSRR | 80 | dB | CBP = 0µF, IOUT = 30mA, COUT = 1μF, VIN = 2.8V, VOUT = 1.8V, ΔVRIPPLE = 0.2VP-P, f = 217Hz, +25℃ | 5 | ||
| Power Supply Rejection Ratio (f = 1kHz, CBP = 0µF) | PSRR | 70 | dB | CBP = 0µF, IOUT = 30mA, COUT = 1μF, VIN = 2.8V, VOUT = 1.8V, ΔVRIPPLE = 0.2VP-P, f = 1kHz, +25℃ | 5 | ||
| Power Supply Rejection Ratio (f = 217Hz, CBP = 0.01µF) | PSRR | 82 | dB | CBP = 0.01μF, IOUT = 30mA, COUT = 1μF, VIN = 2.8V, VOUT = 1.8V, ΔVRIPPLE = 0.2VP-P, f = 217Hz, +25℃ | 5 | ||
| Power Supply Rejection Ratio (f = 1kHz, CBP = 0.01µF) | PSRR | 75 | dB | CBP = 0.01μF, IOUT = 30mA, COUT = 1μF, VIN = 2.8V, VOUT = 1.8V, ΔVRIPPLE = 0.2VP-P, f = 1kHz, +25℃ | 5 | ||
| Output Voltage Noise (CBP = 0µF, IOUT = 0mA) | en | 70 | µVRMS | CBP = 0µF, f = 10Hz to 100kHz, COUT = 1µF, VIN = 2.8V, VOUT = 1.8V, IOUT = 0mA, +25℃ | 5 | ||
| Output Voltage Noise (CBP = 0µF, IOUT = 30mA) | en | 100 | µVRMS | CBP = 0µF, f = 10Hz to 100kHz, COUT = 1µF, VIN = 2.8V, VOUT = 1.8V, IOUT = 30mA, +25℃ | 5 | ||
| Output Voltage Noise (CBP = 0.01µF, IOUT = 0mA) | en | 25 | µVRMS | CBP = 0.01µF, f = 10Hz to 100kHz, COUT = 1µF, VIN = 2.8V, VOUT = 1.8V, IOUT = 0mA, +25℃ | 5 | ||
| Output Voltage Noise (CBP = 0.01µF, IOUT = 30mA) | en | 65 | µVRMS | CBP = 0.01µF, f = 10Hz to 100kHz, COUT = 1µF, VIN = 2.8V, VOUT = 1.8V, IOUT = 30mA, +25℃ | 5 | ||
| Output Voltage Temperature Coefficient | TCVOUT | 30 | ppm/℃ | IOUT = 0.1mA, Full (-40℃ to +85℃) | 5 | ||
| EN Input Threshold High | VIH | 1.5 | V | VIN = 1.6V to 5.5V, Full | 6 | ||
| EN Input Threshold Low | VIL | 0.4 | V | VIN = 1.6V to 5.5V, Full | 6 | ||
| EN Input Bias Current (high) | IBH | 0.8 | 2 | µA | VEN = 5.5V, Full | 6 | |
| EN Input Bias Current (low) | IBL | 0.01 | 1 | µA | VEN = 0V, Full | 6 | |
| Shutdown Supply Current | ISHDN | 0.01 | 1 | µA | VEN = 0V, Full | 6 | |
| Start-Up Time | tSTR | 30 | µs | COUT = 1μF, No Load, CBP = 0µF, +25℃ | 6 | ||
| RON of Discharge MOSFET | RON | 50 | Ω | VIN = 4.0V, VEN = 0V, +25℃ | 6 | ||
| Thermal Shutdown Temperature | TSHDN | 140 | ℃ | 6 | |||
| Thermal Shutdown Hysteresis | ΔTSHDN | 15 | ℃ | 6 | |||
| Operating Voltage Range | VIN | 1.6 | 5.5 | V | 3 | ||
| Operating Temperature Range | TA | -40 | 85 | ℃ | 3 | ||
| IN to GND | VIN | -0.3 | 6 | V | 3 | ||
| EN to GND | VEN | -0.3 | 6 | V | 3 | ||
| OUT, BP/FB to GND | -0.3 | V | Upper limit printed as (VIN +0.3V) | 3 | |||
| Junction Temperature | TJ | 150 | ℃ | 3 | |||
| Storage Temperature Range | TSTG | -65 | 150 | ℃ | 3 |
CAD (KiCad official)
- Symbol:
BCT2038EUK12-TR - Footprint:
Package_TO_SOT_SMD:SOT-23-5 - 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files:
bct2038euk12-tr-etched.step/bct2038euk12-tr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bct2038euk12-tr.step/bct2038euk12-tr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: BROADCHIP datasheet (18 pp, sha256
85f29f031228797a, retrieved 2026-10-17, 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).
# BCT2038EUK12-TR
**BROADCHIP** · Linear Voltage Regulators (LDO) · SOT-23-5
BCT2038EUK12-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 | IN | power_in | Regulator input; supply voltage can range from 1.6V to 5.5V and the pin should be bypassed with a 1μF capacitor to GND. |
| 2 | GND | power_in | Ground reference pin for the regulator. |
| 3 | EN | input | Enable pin with an internal pull-down resistor; a logic low reduces the supply current to less than 1μA, and it must be connected to IN for normal operation. |
| 4 | BP | passive | Reference-noise bypass pin on the fixed-voltage version (this MPN is 1.2V fixed); bypass with a low-leakage 0.01μF ceramic capacitor placed very close to the pin for reduced output noise and high PSRR. |
| 5 | OUT | power_out | Regulator output. |
## 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 |
|---|---|---|---|---|---|---|---|
| Input Voltage | VIN | 1.6 | | 5.5 | V | +25℃ | 5 |
| Output Voltage Accuracy | | -2.5 | | 2.5 | % | IOUT = 0.1mA, +25℃ | 5 |
| Dropout Voltage (1.2V ≤ VOUT < 1.8V) | VDROP | | 945 | 1280 | mV | IOUT = 500mA, +25℃ | 5 |
| Line Regulation (VOUT < 1.8V or VOUT > 3.3V) | | | 0.01 | 0.1 | %/V | VIN = 1.6V or (VOUT + 0.5V) to 5.5V, IOUT = 1mA, +25℃ | 5 |
| Load Regulation | ΔVOUT | | 12 | 40 | mV | IOUT = 0.1mA to 500mA, +25℃ | 5 |
| Maximum Output Current | | | | 500 | mA | +25℃, see Note 1 | 5 |
| Current Limit | ILIM | | 560 | 800 | mA | +25℃ | 5 |
| Short Current Limit | ISHORT | | | 320 | mA | VOUT = 0V, +25℃ | 5 |
| Ground Pin Current | IQ | | 20 | 26 | µA | No Load, VEN = VIN, +25℃ | 5 |
| Power Supply Rejection Ratio (f = 217Hz, CBP = 0µF) | PSRR | | 80 | | dB | CBP = 0µF, IOUT = 30mA, COUT = 1μF, VIN = 2.8V, VOUT = 1.8V, ΔVRIPPLE = 0.2VP-P, f = 217Hz, +25℃ | 5 |
| Power Supply Rejection Ratio (f = 1kHz, CBP = 0µF) | PSRR | | 70 | | dB | CBP = 0µF, IOUT = 30mA, COUT = 1μF, VIN = 2.8V, VOUT = 1.8V, ΔVRIPPLE = 0.2VP-P, f = 1kHz, +25℃ | 5 |
| Power Supply Rejection Ratio (f = 217Hz, CBP = 0.01µF) | PSRR | | 82 | | dB | CBP = 0.01μF, IOUT = 30mA, COUT = 1μF, VIN = 2.8V, VOUT = 1.8V, ΔVRIPPLE = 0.2VP-P, f = 217Hz, +25℃ | 5 |
| Power Supply Rejection Ratio (f = 1kHz, CBP = 0.01µF) | PSRR | | 75 | | dB | CBP = 0.01μF, IOUT = 30mA, COUT = 1μF, VIN = 2.8V, VOUT = 1.8V, ΔVRIPPLE = 0.2VP-P, f = 1kHz, +25℃ | 5 |
| Output Voltage Noise (CBP = 0µF, IOUT = 0mA) | en | | 70 | | µVRMS | CBP = 0µF, f = 10Hz to 100kHz, COUT = 1µF, VIN = 2.8V, VOUT = 1.8V, IOUT = 0mA, +25℃ | 5 |
| Output Voltage Noise (CBP = 0µF, IOUT = 30mA) | en | | 100 | | µVRMS | CBP = 0µF, f = 10Hz to 100kHz, COUT = 1µF, VIN = 2.8V, VOUT = 1.8V, IOUT = 30mA, +25℃ | 5 |
| Output Voltage Noise (CBP = 0.01µF, IOUT = 0mA) | en | | 25 | | µVRMS | CBP = 0.01µF, f = 10Hz to 100kHz, COUT = 1µF, VIN = 2.8V, VOUT = 1.8V, IOUT = 0mA, +25℃ | 5 |
| Output Voltage Noise (CBP = 0.01µF, IOUT = 30mA) | en | | 65 | | µVRMS | CBP = 0.01µF, f = 10Hz to 100kHz, COUT = 1µF, VIN = 2.8V, VOUT = 1.8V, IOUT = 30mA, +25℃ | 5 |
| Output Voltage Temperature Coefficient | TCVOUT | | | 30 | ppm/℃ | IOUT = 0.1mA, Full (-40℃ to +85℃) | 5 |
| EN Input Threshold High | VIH | 1.5 | | | V | VIN = 1.6V to 5.5V, Full | 6 |
| EN Input Threshold Low | VIL | | | 0.4 | V | VIN = 1.6V to 5.5V, Full | 6 |
| EN Input Bias Current (high) | IBH | | 0.8 | 2 | µA | VEN = 5.5V, Full | 6 |
| EN Input Bias Current (low) | IBL | | 0.01 | 1 | µA | VEN = 0V, Full | 6 |
| Shutdown Supply Current | ISHDN | | 0.01 | 1 | µA | VEN = 0V, Full | 6 |
| Start-Up Time | tSTR | | 30 | | µs | COUT = 1μF, No Load, CBP = 0µF, +25℃ | 6 |
| RON of Discharge MOSFET | RON | | 50 | | Ω | VIN = 4.0V, VEN = 0V, +25℃ | 6 |
| Thermal Shutdown Temperature | TSHDN | | 140 | | ℃ | | 6 |
| Thermal Shutdown Hysteresis | ΔTSHDN | | 15 | | ℃ | | 6 |
| Operating Voltage Range | VIN | 1.6 | | 5.5 | V | | 3 |
| Operating Temperature Range | TA | -40 | | 85 | ℃ | | 3 |
| IN to GND | VIN | -0.3 | | 6 | V | | 3 |
| EN to GND | VEN | -0.3 | | 6 | V | | 3 |
| OUT, BP/FB to GND | | -0.3 | | | V | Upper limit printed as (VIN +0.3V) | 3 |
| Junction Temperature | TJ | | | 150 | ℃ | | 3 |
| Storage Temperature Range | TSTG | -65 | | 150 | ℃ | | 3 |
## CAD (KiCad official)
- Symbol: `BCT2038EUK12-TR`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files: `bct2038euk12-tr-etched.step` / `bct2038euk12-tr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bct2038euk12-tr.step` / `bct2038euk12-tr.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [BROADCHIP datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588945667398385664) (18 pp, sha256 `85f29f031228797a`, retrieved 2026-10-17, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-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).
[Datasheet PDF](docs/bct2038euk12-tr-datasheet.pdf)