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MT7202
Public Made by Adomby adom
MAXIC Tech LED Drivers, SOT-89-5. 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
markdownMT7202
MAXIC Tech · LED Drivers · SOT-89-5
MT7202 from MAXIC Tech, in a SOT-89-5. 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 | LX | output | Drain of the internal power switch and the inductor connection node; it is a fast-switching node, so the PCB trace should be kept as short as possible. |
| 2 | GND | power_in | Chip ground, which should be kept well grounded to minimize ground bounce. |
| 3 | ADJ | input | Multi-function on/off and brightness control: floating gives VADJ = 2.38 V and nominal current 0.1/RS, output is off below 0.235 V, analog dimming from 20% to 100% of IOUTnom applies between 0.235 V and 1.6 V, output is clamped at 100% above 1.6 V, PWM signals are accepted, and a capacitor to GND adds soft-start time. |
| 4 | ISENSE | input | Current sense input; the sense resistor RS is connected between ISENSE and VIN and sets the average LED current IOUTnom = 0.1/RS, with RS minimum 0.066 Ω when ADJ is floating. |
| 5 | VIN | power_in | Supply input rated 6 V to 50 V, to be decoupled to GND with a 4.7 µF or larger X7R ceramic capacitor placed as close to the chip as possible. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | MAXIC Tech |
| Package | SOT-89-5 |
| Category | Nixie Tube Driver/LED Driver |
| 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 |
|---|---|---|---|---|---|---|---|
| 输入电压 | VIN | 6 | 50 | V | 3 | ||
| 平均采样电压 | VSENSE | 95 | 100 | 105 | mV | ISENSE相对 VIN | 3 |
| 输出电流精度 | -3 | 3 | % | 1 | |||
| 采样电压迟滞 | VSENSEHYS | -15 | 15 | % | 3 | ||
| ISENSE管脚输入电流 | ISENSE | 1.25 | 10 | μA | VSENSE=VIN-0.1 | 3 | |
| 低频 PWM 调光占空比范围 | DPWM | 0.01 | 1 | 频率小于 500Hz; 振幅在 1.5V~5.5V | 3 | ||
| 模拟调光电压范围 | VADJ | 0.235 | 1.6 | V | 3 | ||
| 最大工作频率时建议占空比 | DLX | 0.3 | 0.7 | 最大工作频率时 | 3 | ||
| 功率开关最小打开时间 | TONmin | 200 | ns | LX '开' | 3 | ||
| 功率开关最小关断时间 | TOFFmin | 200 | ns | LX '关' | 3 | ||
| 建议最大工作频率 | fLXmax | 1.1 | MHz | 3 | |||
| 关断电流 | IINQoff | 120 | μA | ADJ 接地 | 3 | ||
| 最低启动电压 | VSU | 5.8 | V | VIN上升 | 3 | ||
| 静态电流 | IINQon | 600 | μA | ADJ 悬空; f=250kHz | 3 | ||
| 内部基准电压 | VREF | 1.2 | V | 3 | |||
| VREF温度系数 | ΔVREF/ΔT | 50 | ppm/°C | 3 | |||
| 关闭系统时 ADJ 脚直流电压 | VADJoff | 0.21 | V | VADJ减小 | 3 | ||
| 打开系统时 ADJ 脚直流电压 | VADJon | 0.235 | V | VADJ增大 | 3 | ||
| LX 输入平均电流 | ILXmean | 1.5 | A | 3 | |||
| 功率开关导通电阻 | RLX | 0.4 | Ω | 3 | |||
| 功率开关漏电流 | ILX(leak) | 1 | μA | 3 | |||
| 内部比较器延时 | TPD | 50 | ns | 3 | |||
| 过温保护阈值 | TSD | 165 | °C | 3 | |||
| 过温保护迟滞 | TSD-HYS | 30 | °C | 3 | |||
| VIN 输入电压 (绝对最大) | VIN | -0.3 | 60 | V | 2 | ||
| ISENSE 端电压 (相对 VIN) | VSENSE | -5 | 0.3 | V | 相对 VIN | 2 | |
| LX 电压 | VLX | -0.3 | 60 | V | 2 | ||
| ADJ 电压 | VADJ | -0.3 | 6 | V | 2 | ||
| 功率开关输出电流 | ILX | 1.5 | A | 2 | |||
| 功耗 | Ptot | 1 | W | 2 | |||
| 工作温度 | TOP | -40 | 105 | °C | 2 | ||
| 存储温度 | TST | -55 | 150 | °C | 2 | ||
| 最高结温度 | Tj MAX | 150 | °C | 2 | |||
| ESD (HBM) | 4 | KV | HBM | 2 | |||
| 内部芯片到环境热阻 | RθJA | 78 | °C/W | 2 | |||
| PN 结到封装表面热阻 | RθJC | 45 | °C/W | 2 | |||
| 降压 RS 最小值 | RS | 0.066 | Ω | ADJ 脚悬空 | 2 | ||
| PWM 信号振幅 | 2 | V | PWM 信号 | 8 | |||
| PWM 调光信号频率下限 | 100 | Hz | 7 | ||||
| PWM 调光信号频率上限 | 2 | kHz | 7 | ||||
| 电感推荐范围 | L | 27 | 100 | uH | 7 | ||
| 输入旁路电容最小值 | 4.7 | uF | 直流输入 | 7 |
CAD (KiCad official)
- Symbol:
MT7202 - Footprint:
Package_TO_SOT_SMD:SOT-89-5 - 3D model: SOT-89-5 (KiCad packages3D, STEP)
- 3D model files:
mt7202-etched.step/mt7202-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mt7202.step/mt7202.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: MAXIC Tech datasheet (9 pp, sha256
d19067e7548eddfb, retrieved 2026-10-17, 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-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).