component
ICW3121AM6G
Public Made by Adomby adom
ICW DC-DC Converters, SOT23-6. 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
markdownICW3121AM6G
ICW · DC-DC Converters · SOT23-6
ICW3121AM6G from ICW, in a SOT23-6. 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 | BOOT | passive | Bootstrap pin that requires a ceramic capacitor of not less than 0.1 uF between BOOT and LX to supply the high-side switch driver. |
| 2 | GND | power_in | Ground pin. |
| 3 | FB | input | Feedback voltage pin connected to the inverting input of the error amplifier, with 0.6 V reference (0.588 to 0.612 V). |
| 4 | EN | input | Enable input pin; the chip operates when input logic is high (rising threshold 1.5 V max, falling threshold 0.8 V min, absolute max 18 V). |
| 5 | VIN | power_in | Power input supplying the controller and converter switches, operating range 4.5 V to 18 V. |
| 6 | LX | passive | Switch node connected to the inductor, with absolute maximum voltage -0.3 V to 18 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | ICW |
| Package | SOT23-6 |
| 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 |
|---|---|---|---|---|---|---|---|
| Input voltage range | VIN | 4.5 | 18 | V | 5 | ||
| Shutdown current | ISD | 8 | 15 | uA | VIN = 18 V, IC disabled | 5 | |
| Quiescent current | IQ | 120 | 200 | uA | VIN = 18 V, IC enabled, VFB = 0.7 V | 5 | |
| Feedback reference voltage | VREF | 0.588 | 0.6 | 0.612 | V | 5 | |
| High-side switch on-resistance | RDSON_H | 50 | 70 | mΩ | VBOOT - VLX = 4.3 V | 5 | |
| Low-side switch on-resistance | RDSON_L | 90 | 110 | mΩ | 5 | ||
| Peak current limit | ILIM_PEAK | 5.5 | 6.5 | A | 5 | ||
| Valley current limit | ILIM_VALLEY | 3.3 | 4.3 | A | 5 | ||
| Enable rising threshold | VENH | 1.3 | 1.5 | V | VEN rising | 5 | |
| Enable falling threshold | VENL | 0.8 | 1 | V | 5 | ||
| Input UVLO threshold | VIN_UVLO | 4.4 | 4.5 | V | VIN rising | 5 | |
| Minimum on-time | Tmin_on | 110 | 150 | ns | 5 | ||
| Minimum off-time | Tmin_off | 150 | 200 | ns | 5 | ||
| Input UVLO hysteresis | VIN_HYS | 0.25 | V | 5 | |||
| Switching frequency | FSW | 500 | kHz | 5 | |||
| Soft-start time | tss | 2.3 | ms | 5 | |||
| Over-temperature protection | TOTP | 170 | °C | 5 | |||
| Over-temperature hysteresis | THYS | 40 | °C | 5 | |||
| VIN pin voltage | VIN | -0.3 | 18 | V | 4 | ||
| LX pin voltage | VLX | -0.3 | 18 | V | 4 | ||
| BOOT to SW pin voltage | VBOOT_SW | -0.3 | 6 | V | 4 | ||
| EN pin voltage | VEN | -0.3 | 18 | V | 4 | ||
| FB pin voltage | VFB | -0.3 | 18 | V | 4 | ||
| Package power dissipation | Pd | 0.63 | W | 4 | |||
| Operating ambient temperature | TA | -40 | 85 | ℃ | 4 | ||
| Storage temperature | TSTG | -55 | 150 | ℃ | 4 | ||
| Junction temperature | TJ | -40 | 150 | ℃ | 4 | ||
| Input voltage | VIN | 4.5 | 12 | 18 | V | 5 | |
| Output voltage | VOUT | 0.6 | 3.3 | 12 | V | 5 | |
| Inductance | L | 1.2 | 3.3 | 6 | uH | 5 | |
| Output capacitance | COUT | 20 | 40 | uF | 5 | ||
| Operating ambient temperature | TA | -40 | 85 | ºC | 5 | ||
| Thermal resistance, junction to ambient | θJA | 200 | ℃/W | junction to air | 4 |
CAD (KiCad official)
- Symbol:
ICW3121AM6G - Footprint:
Package_TO_SOT_SMD:SOT-23-6 - 3D model: SOT23-6 (KiCad packages3D, STEP)
- 3D model files:
icw3121am6g-etched.step/icw3121am6g-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);icw3121am6g.step/icw3121am6g.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: ICW datasheet (10 pp, sha256
76058844ff21bc01, retrieved 2026-10-22, tier: lcsc) - Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-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).