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SE8733K2B-HF

Public Made by Adom

by adom

Seaward Elec Linear Voltage Regulators (LDO), SOT-89-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Symbol & Footprint

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Contents

README

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SE8733K2B-HF

Seaward Elec · Linear Voltage Regulators (LDO) · SOT-89-3

SE8733K2B-HF from Seaward Elec, in a SOT-89-3. 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 VOUT power_out Regulated output (3.3V for this part), needs at least 1µF and recommended 10µF MLCC output capacitor; output current 150mA min, current limit 350mA.
2 GND power_in Ground, also connected to the package tab on the conductive-glue SOT89 drawing.
3 VIN power_in Power input, 4.5V to 40V operating range (absolute maximum 45V), with a 10µF capacitor placed close to the pin.

Key specifications

Parameter Value
Manufacturer Seaward Elec
Package SOT-89-3
Category Power Management ICs
Pins 3

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 Supply Voltage VIN 4.5 40 V VIN=12V; Tj=25℃ 4
Output Voltage Accuracy VOUT -1 1 % IOUT=10mA 4
Output Voltage Accuracy (2% grade) VOUT -2 2 % IOUT=10mA 4
Quiescent Current IQ 4.5 8 μA 4
Output Current IOUT 150 200 mA 4
Dropout Voltage VDROP 60 mV IOUT=10mA, ΔVOUT= - VOUT *2% 4
Dropout Voltage VDROP 600 mV IOUT=100mA, ΔVOUT= - VOUT *2% 4
Load Regulation VLR 20 mV 1mA ≤ IOUT≤ 100mA 4
Line Regulation VSR 0.08 %/V IOUT=1mA, VIN=(VOUT +4V) to 45V 4
Current Limit ILIMIT 350 mA VIN=(VOUT +1V) to 30V, RLOAD=VOUT /1A 4
Thermal Protection TSHDN 165 ℃ 4
Output Voltage Temperature Coefficient TCVOUT -100 100 ppm/℃ IOUT=10mA, -40℃≤TAMB≤100℃ 4
PSRR 100Hz PSRR 60 dB Vin=10V, VPP=0.5V, Iout=1mA, Freq=100Hz 4
PSRR 1kHz PSRR 50 dB Vin=10V, VPP=0.5V, Iout=1mA, Freq=1KHz 4
PSRR 10kHz PSRR 40 dB Vin=10V, VPP=0.5V, Iout=1mA, Freq=10KHz 4
Input Voltage VIN -0.3 45 V 3
Output Voltage VOUT -0.3 6.5 V 3
Junction Temperature TJ -40 150 ℃ 3
Storage Temperature Tstg -55 150 ℃ 3
Package Lead Soldering Temperature Tsolder 260 ℃ 10s 3
ESD Machine Mode ESD MM 200 V 3
ESD Human Body Mode ESD HBM 3000 V 3
Power Consumption PD 750 mW SOT89 3
Thermal Resistance, Junction-to-Ambient θJA 165 ℃/W SOT89 3
VIN Supply Voltage VIN 4.5 40 V 3
Thermal Resistance on PCB RθJA 45 ℃/W 3
Operating Temperature TOPT -40 105 ℃ 3

CAD (KiCad official)

  • Symbol: SE8733K2B-HF
  • Footprint: Package_TO_SOT_SMD:SOT-89-3
  • 3D model: SOT-89-3 (KiCad packages3D, STEP)
  • 3D model files: se8733k2b-hf-etched.step / se8733k2b-hf-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); se8733k2b-hf.step / se8733k2b-hf.glb are the bare package body.

Provenance

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

  • Datasheet: Seaward Elec datasheet (10 pp, sha256 0503c9eda718bcb8, retrieved 2026-10-30, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-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