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SCT2231TVAR
Public Made by Adomby adom
SCT DC-DC Converters, SOT-563-6. 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
markdownSCT2231TVAR
SCT · DC-DC Converters · SOT-563-6
SCT2231TVAR from SCT, in a SOT-563-6. 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 | VIN | power_in | Power supply input that supplies the IC and the step-down converter switches and must be driven from a 4.2V to 17V source. |
| 2 | SW | power_out | Power switching output node that feeds the LC output filter, with a capacitor required from SW to BST to power the high-side switch. |
| 3 | GND | power_in | Power ground that must be soldered directly to the ground plane. |
| 4 | BST | power_in | Supply for the high-side power MOSFET gate driver that requires a 0.1uF or greater ceramic capacitor between BST and SW. |
| 5 | EN | input | Enable logic input with precision thresholds of 1.2V rising and 1.1V falling, where floating the pin enables the device. |
| 6 | FB | input | Feedback sensing input connected to a resistor divider from VOUT, which the device regulates to the internal 0.8V typical reference. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | SCT |
| Package | SOT-563-6 |
| Category | Power Management ICs |
| Pins | 6 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Supply Voltage | VIN | -0.3 | 20 | V | Over operating free-air temperature unless otherwise noted | 2 | |
| Switch Node Voltage | VSW | -1 | 20 | V | Over operating free-air temperature unless otherwise noted | 2 | |
| Switch Node Transient Voltage | VSW(<10ns) | -2.5 | 22 | V | <10ns | 2 | |
| Bootstrap Voltage | VBST | -0.3 | 6 | V | Referenced to VSW: VSW-0.3 to VSW+6 | 2 | |
| Feedback Voltage | VFB | -0.3 | 6.5 | V | Over operating free-air temperature unless otherwise noted | 2 | |
| Enable/UVLO Voltage | VEN | -0.3 | 6.5 | V | Over operating free-air temperature unless otherwise noted | 2 | |
| Operating junction temperature | TJ | -40 | 125 | °C | Over operating free-air temperature unless otherwise noted | 2 | |
| Storage temperature | TSTG | -65 | 150 | °C | Over operating free-air temperature unless otherwise noted | 2 | |
| Input voltage range | VIN | 4.2 | 17 | V | Over operating free-air temperature range unless otherwise noted | 3 | |
| Operating junction temperature | TJ | -40 | 125 | °C | Over operating free-air temperature range unless otherwise noted | 3 | |
| Human Body Model ESD | VESD | -2 | 2 | kV | HBM per ANSI-JEDEC-JS-001-2014, all pins | 3 | |
| Charged Device Model ESD | VESD | -0.5 | 0.5 | kV | CDM per ANSI-JEDEC-JS-002-2014, all pins | 3 | |
| Junction to ambient thermal resistance (SOT563) | RθJA | 120 | °C/W | SOT563 package | 3 | ||
| Junction to case thermal resistance (SOT563) | RθJC | 8 | °C/W | SOT563 package | 3 | ||
| Operating input voltage | VIN | 4.2 | 17 | V | 4 | ||
| Input UVLO | VIN_UVLO | 4 | 4.15 | V | VIN rising | 4 | |
| Input UVLO hysteresis | 300 | mV | 4 | ||||
| Shutdown current | ISD | 1.5 | 5 | uA | EN=0, No load, VIN=12V | 4 | |
| Quiescent current | IQ | 275 | uA | EN=2V, No load, No switching. VIN=12V. BST-SW=5V | 4 | ||
| Enable high threshold | VEN_H | 1.18 | 1.25 | V | 4 | ||
| Enable low threshold | VEN_L | 1.03 | 1.1 | V | 4 | ||
| Enable pin input current | IEN | 1 | 1.5 | 2 | uA | EN=1V | 4 |
| Enable pin hysteresis current | IEN_HYS | 5.5 | uA | EN=1.5V | 4 | ||
| High side FET on-resistance | RDSON_H | 70 | mΩ | 4 | |||
| Low side FET on-resistance | RDSON_L | 42 | mΩ | 4 | |||
| Feedback Voltage | VFB | 0.792 | 0.8 | 0.808 | V | TJ=25°C | 4 |
| Feedback Voltage | VFB | 0.784 | 0.8 | 0.816 | V | TJ=-40°C~125°C | 4 |
| LSD valley current limit | ILIM_LSD | 3.2 | 3.7 | 4.2 | A | 4 | |
| Switching frequency | FSW | 750 | kHz | VIN=12V, VOUT=5V | 4 | ||
| Minimum on-time | tON_MIN | 90 | ns | 4 | |||
| Minimum off-time | tOFF_MIN | 220 | ns | 4 | |||
| Internal soft-start time | tSS | 2.5 | ms | 4 | |||
| Thermal shutdown threshold | TSD | 160 | °C | TJ rising | 4 | ||
| Thermal shutdown hysteresis | 20 | 4 |
CAD (KiCad official)
- Symbol:
SCT2231TVAR - Footprint:
Package_TO_SOT_SMD:SOT-563 - 3D model: SOT-563-6 (KiCad packages3D, STEP)
- 3D model files:
sct2231tvar-etched.step/sct2231tvar-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sct2231tvar.step/sct2231tvar.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: SCT datasheet (18 pp, sha256
f3634eba5d522281, retrieved 2026-10-28, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusoff(skipped (clean text read)), 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).