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BCT2057EUK18-TR

Public Made by Adom

by adom

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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BCT2057EUK18-TR

BROADCHIP · Linear Voltage Regulators (LDO) · SOT-23-5

BCT2057EUK18-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, operating from 1.6V to 5.5V, with absolute maximum IN to GND of 6.5V.
2 GND power_in Ground reference pin for the regulator.
3 EN input Enable pin, active high; the regulator turns on when EN is above 1.5V and enters shutdown when EN falls below 0.3V.
4 ADJ passive Output voltage adjust pin, which is not connected (NC) on fixed-output versions, including the 1.8V BCT2057EUK18-TR.
5 OUT power_out Regulator output, with a minimum current limit of 1A and an over-current protection limit of 1.8A typical.

Key specifications

Parameter Value
Manufacturer BROADCHIP
Package SOT-23-5
Category Power Management ICs
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 6
Output Voltage Accuracy -2 2 % IOUT=1mA 6
Maximum Output Current 1 A VIN=1.6V or (VOUT+0.5V) 6
Ground Pin Current IQ 30 100 uA No load, EN=2V 6
EN Input Threshold (high) VIH 1.5 V VIN=1.6V to 5.5V, VEN=-0.3V to VIN 6
EN Input Threshold (low) VIL 0.3 V 6
EN Input Bias Current IB(SHDN) 0.01 1 uA EN=0V or EN=VIN 6
Shutdown Supply Current IQ(SHDN) 0.01 1 uA EN=0.4V 6
Operating Temperature Range -40 85 °C 5
IN to GND -0.3 6.5 V 5
EN to GND (max = VIN) -0.3 V max = VIN as printed 5
OUT to GND (max = VIN+0.3V) -0.3 V max = VIN+0.3V as printed 5
Power Dissipation SOT23-5 PD 0.5 W TA=25℃ 5
Junction Temperature TJ 150 ℃ 5
Storage Temperature Range -65 150 ℃ 5
Current Limit ILIM 1.8 A VIN=1.6V or (VOUT+0.5V) 6
Short-Circuit Current ISHORT 0.6 A VIN=1.6V or (VOUT+0.5V) 6
Dropout Voltage (1.2V<=VOUT<2.5V, 600mA) 0.35 V IOUT=600mA, 1.2V≤VOUT<2.5V 6
Dropout Voltage (1.2V<=VOUT<2.5V, 1A) 0.55 V IOUT=1A, 1.2V≤VOUT<2.5V 6
Line Regulation ΔVLNR 0.05 %/V VIN=1.6V or (VOUT+0.5V) to 5.5V, IOUT=1mA 6
Load Regulation (VOUT≤2V) ΔVLDR 0.004 %/mA IOUT=1mA to 1A, COUT=4.7uF, VOUT≤2V 6
Power Supply Rejection Ratio (217Hz) PSRR 65 dB ILOAD=50mA, COUT=4.7uF, VIN=VOUT+1V, f=217Hz 6
Power Supply Rejection Ratio (1kHz) PSRR 60 dB ILOAD=50mA, COUT=4.7uF, VIN=VOUT+1V, f=1kHz 6
Shutdown Exit Delay 30 us COUT=4.7uF, No Load 6
Thermal Shutdown Temperature TSHDN 150 °C 6
Thermal Shutdown Hysteresis ΔTSHDN 15 °C 6

CAD (KiCad official)

  • Symbol: BCT2057EUK18-TR
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5 (KiCad packages3D, STEP)
  • 3D model files: bct2057euk18-tr-etched.step / bct2057euk18-tr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); bct2057euk18-tr.step / bct2057euk18-tr.glb are the bare package body.

Provenance

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

  • Datasheet: BROADCHIP datasheet (11 pp, sha256 e2d4a8b052acbab0, retrieved 2026-10-18, 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