HT7140-1

MSKSEMI · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23

HT7140-1 from MSKSEMI, in a SOT-23. 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	GND	power_in	Ground pin (接地脚) of the regulator, numbered 1 in the package pin diagram shared by the SOT-89 and SOT-23 outlines.
2	VIN	power_in	Input voltage pin; the datasheet rates VIN up to 24 V, and input capacitors should be placed close to the VIN and VOUT pins.
3	VOUT	power_out	Regulated output pin at 4.0 V nominal (3.92 V to 4.08 V at IOUT = 10 mA), with output current of 100 mA typical (70 mA minimum); an output-to-ground capacitor greater than 2.2 μF is required, with tantalum recommended.

Key specifications

Parameter	Value
Manufacturer	MSKSEMI
Package	SOT-23
Category	Power Management (PMIC)
Pins	3

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter	Symbol	Min	Typ	Max	Unit	Conditions	Page
Output voltage	VOUT	3.92	4	4.08	V	VIN=VOUT+2.0V, IOUT=10mA	6
Output current	IOUT	70	100		mA	VIN=VOUT+2.0V	6
Load regulation	ΔVOUT		25	60	mV	VIN=VOUT+2.0V, 1mA≤IOUT≤50mA	6
Dropout voltage	VDIF		25	55	mV	IOUT=1mA, ΔVOUT=2%	6
Quiescent current	ISS		1.5	3	μA	No load	6
Line regulation	ΔVOUT/VOUT*ΔVIN			0.2	%/V	IOUT+1.0V≤VIN≤24V, IOUT=1mA	6
Input voltage	VIN			24	V		6
Output capacitor to GND		2.2			μF	Output to ground; tantalum capacitor recommended	8
Output voltage temperature coefficient	ΔVOUT/ΔTA*VOUT		100		ppm/℃	VOUT+2.0V, IOUT=10mA, -40℃≤TA≤85℃	6

CAD (KiCad official)

Symbol: HT7140-1
Footprint: Package_TO_SOT_SMD:SOT-23
3D model: SOT-23 (KiCad packages3D, STEP)
3D model files: ht7140-1-etched.step / ht7140-1-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ht7140-1.step / ht7140-1.glb are the bare package body.

Provenance

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

Datasheet: MSKSEMI datasheet (11 pp, sha256 3cc88a126be2ebbd, retrieved 2026-10-18, 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

# HT7140-1

**MSKSEMI** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23

HT7140-1 from MSKSEMI, in a SOT-23. 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 | GND | power_in | Ground pin (接地脚) of the regulator, numbered 1 in the package pin diagram shared by the SOT-89 and SOT-23 outlines. |
| 2 | VIN | power_in | Input voltage pin; the datasheet rates VIN up to 24 V, and input capacitors should be placed close to the VIN and VOUT pins. |
| 3 | VOUT | power_out | Regulated output pin at 4.0 V nominal (3.92 V to 4.08 V at IOUT = 10 mA), with output current of 100 mA typical (70 mA minimum); an output-to-ground capacitor greater than 2.2 μF is required, with tantalum recommended. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | MSKSEMI |
| Package | SOT-23 |
| Category | Power Management (PMIC) |
| Pins | 3 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Output voltage | VOUT | 3.92 | 4 | 4.08 | V | VIN=VOUT+2.0V, IOUT=10mA | 6 |
| Output current | IOUT | 70 | 100 |  | mA | VIN=VOUT+2.0V | 6 |
| Load regulation | ΔVOUT |  | 25 | 60 | mV | VIN=VOUT+2.0V, 1mA≤IOUT≤50mA | 6 |
| Dropout voltage | VDIF |  | 25 | 55 | mV | IOUT=1mA, ΔVOUT=2% | 6 |
| Quiescent current | ISS |  | 1.5 | 3 | μA | No load | 6 |
| Line regulation | ΔVOUT/VOUT*ΔVIN |  |  | 0.2 | %/V | IOUT+1.0V≤VIN≤24V, IOUT=1mA | 6 |
| Input voltage | VIN |  |  | 24 | V |  | 6 |
| Output capacitor to GND |  | 2.2 |  |  | μF | Output to ground; tantalum capacitor recommended | 8 |
| Output voltage temperature coefficient | ΔVOUT/ΔTA*VOUT |  | 100 |  | ppm/℃ | VOUT+2.0V, IOUT=10mA, -40℃≤TA≤85℃ | 6 |

## CAD (KiCad official)

- Symbol: `HT7140-1`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `ht7140-1-etched.step` / `ht7140-1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ht7140-1.step` / `ht7140-1.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [MSKSEMI datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603178063090110464) (11 pp, sha256 `3cc88a126be2ebbd`, retrieved 2026-10-18, 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/ht7140-1-datasheet.pdf)