component
HT7540
Public Made by Adomby adom
HX hengjiaxing Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-23-3. 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
markdownHT7540
HX hengjiaxing · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-3
HT7540 from HX hengjiaxing, in a SOT-23-3. 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 | Chip ground terminal; the datasheet specifies this pin as the ground connection for the regulator. |
| 2 | VOUT | power_out | Chip output terminal; the regulator output with a stated output current of at least 60 mA and a typical 100 mA in the electrical tables. |
| 3 | VIN | power_in | Start-up input terminal; the maximum input voltage is 18 V in the electrical characteristics, with an absolute maximum rating of 20 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | HX hengjiaxing |
| Package | SOT-23-3 |
| 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 |
|---|---|---|---|---|---|---|---|
| 最大输入电压 (Maximum input voltage) | VIN | 20 | V | 2 | |||
| 功耗 (Power dissipation) | PD | 200 | mW | 2 | |||
| 工作温度 (Operating temperature) | Tw | -25 | 70 | ℃ | 2 | ||
| 存储温度 (Storage temperature) | Tc | -50 | 125 | ℃ | 2 | ||
| 焊接温度 (Soldering temperature) | Th | 260 | ℃ | 10s | 2 | ||
| 输出电压 (Output voltage) | VOUT | 4.85 | 5 | 5.15 | V | VIN＝7V，IOUT＝1mA | 4 |
| 输出电流 (Output current) | IOUT | 60 | 100 | mA | VIN＝7V | 4 | |
| 负载调节 (Load regulation) | △VOUT | 60 | 150 | mV | VIN＝7V，1mA≤IOUT≤30mA | 4 | |
| 静态电流 (Quiescent current) | ISS | 2 | 3 | µA | VIN＝7V，空载 | 4 | |
| 输入电压 (Input voltage) | VIN | 18 | V | 4 |
CAD (KiCad official)
- Symbol:
HT7540 - Footprint:
Package_TO_SOT_SMD:SOT-23-3 - 3D model: SOT-23-3 (KiCad packages3D, STEP)
- 3D model files:
ht7540-etched.step/ht7540-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ht7540.step/ht7540.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: HX hengjiaxing datasheet (9 pp, sha256
3198234f9b575192, 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, 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).