component
SQ6211BMST
Public Made by Adomby adom
Sequoia Microelectronics LED Drivers, SOT-23-6. 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
markdownSQ6211BMST
Sequoia Microelectronics · LED Drivers · SOT-23-6
SQ6211BMST from Sequoia Microelectronics, in a SOT-23-6. 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 | VDD | power_in | Supply voltage input of the chip, which needs a ceramic bypass capacitor near the pin; the recommended DC supply range is 12V to 25V, with the absolute maximum rating at 30V. |
| 2 | GND | power_in | Ground of the chip. |
| 3 | GATE | output | Gate driver output for the external power MOSFET switch, clamped internally to 17V (typical) and rated for a 300mA drive capability. |
| 4 | DIM | input | Analog dimming control input whose effective linear dimming range is 0.6V to 3.0V, with the LED current turned off below 0.3V. |
| 5 | COMP | passive | PWM loop compensation node, which connects to an RC compensation network to ground to form the closed-loop feedback control; the absolute maximum pin voltage is 7V. |
| 6 | CS | input | LED current sensing input whose typical sensing threshold is 200mV between CS and GND, with an over-current protection threshold of about 0.8V; the absolute maximum pin voltage is 7V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Sequoia Microelectronics |
| Package | SOT-23-6 |
| Category | LED Drivers |
| 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 |
|---|---|---|---|---|---|---|---|
| VDD input start-up voltage | VDD_ST | 17 | 18 | 19 | V | 4 | |
| VDD minimum operation voltage after start-up | VDD_MIN | 7 | 8 | 9 | V | 4 | |
| Quiescent current at operation mode | IVDD_OP | 1.5 | 2.5 | mA | After start-up, 1nF loading at GATE pin, VCOMP = 2.5V | 4 | |
| Quiescent current at protection mode | IVDD_PRO | 1.2 | 1.8 | mA | 1nF loading at GATE pin, Protection (OCP, OVP, SCP, OTP) tripped | 4 | |
| Current sensing voltage | VCS | 194 | 200 | 206 | mV | 4 | |
| Switching frequency | fOSC | 42 | 45 | 48 | kHz | 4 | |
| Maximum duty | DMAX | 80 | 90 | % | 4 | ||
| Frequency variation vs. temperature | ΔfOSC_T | 6 | % | TA = −40°C to 125°C | 4 | ||
| Frequency variation vs. VDD | ΔfOSC_V | 1 | % | VDD = 12V to 25V | 4 | ||
| Linear dimming range | VDIM_LD | 0.6 | 3 | V | 4 | ||
| LEDs current turn on threshold voltage | VDIM_ON | 3 | V | 4 | |||
| LEDs current turn off threshold voltage | VDIM_OFF | 0.3 | V | 4 | |||
| Current source | IDIM | 270 | 300 | 330 | μA | 4 | |
| GATE pin clamp voltage | VCLAMP | 17 | 20 | V | VDD = 25V | 4 | |
| Over voltage protection threshold voltage on the VDD pin | VDD_OVP | 26 | 28 | 30 | V | OVP test | 5 |
| DC input supply voltage range | VDD | 12 | 25 | V | 3 | ||
| Junction temperature range | TJ | -40 | 150 | °C | 3 | ||
| Ambient temperature range | TA | -20 | 85 | °C | 3 | ||
| VDD input pin DC supply voltage | VDD | -0.3 | 30 | V | 3 | ||
| DIM, COMP, CS input pin voltage | VDIM, VCOMP, VCS | -0.3 | 7 | V | 3 | ||
| GATE output pin voltage | VG | 30 | V | 3 | |||
| Power dissipation, SOT23-6 | PD | 0.3 | W | TA = 25°C | 3 | ||
| Junction temperature | TJ | 150 | °C | 3 | |||
| Lead temperature (soldering, 5 sec.) | 260 | °C | Soldering, 5 sec. | 3 | |||
| Storage temperature range | -65 | 150 | °C | 3 | |||
| ESD susceptibility HBM (Human Body Model) | 2 | kV | HBM | 3 | |||
| ESD susceptibility MM (Machine Model) | 200 | V | MM | 3 | |||
| Package thermal resistance, junction-to-ambient, SOT23-6 | θJA | 333 | °C/W | Mounted on low effective thermal conductivity test board in free air at TA = 25°C | 3 | ||
| Package thermal resistance, junction-to-case, SOT23-6 | θJC | 106.6 | °C/W | 3 |
CAD (KiCad official)
- Symbol:
SQ6211BMST - Footprint:
Package_TO_SOT_SMD:SOT-23-6 - 3D model: SOT-23-6 (KiCad packages3D, STEP)
- 3D model files:
sq6211bmst-etched.step/sq6211bmst-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sq6211bmst.step/sq6211bmst.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Sequoia Microelectronics datasheet (9 pp, sha256
84ff18a9af13aa91, 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).