MT7202

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.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mt7202.step / mt7202.glb are 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, primary claude-haiku-5-5 (text), consensus claude-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).

Datasheet PDF

# MT7202

**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.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mt7202.step` / `mt7202.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [MAXIC Tech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588910581663338496) (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`, primary `claude-haiku-5-5` (text), consensus `claude-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).

[Datasheet PDF](docs/mt7202-datasheet.pdf)