component
HX7544
Public Made by Adomby adom
HX hengjiaxing Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
Open in new tab ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
PCB Footprint
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
Datasheet
Open in new tab ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
README
markdownHX7544
HX hengjiaxing · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23
HX7544 from HX hengjiaxing, 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 | Chip ground terminal (芯片接地端); the datasheet gives no separate electrical limit for this pin. |
| 2 | VOUT | power_out | Regulated output; for the HX7544 (4.4 V nominal) the output current is at least 60 mA (100 mA typical) and the dropout is 100 mV typical at 1 mA load. |
| 3 | VIN | power_in | Input (start-up input) terminal; maximum input voltage is 18 V in operation, with a 20 V absolute maximum rating. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | HX hengjiaxing |
| 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 (4.4 V variant) | VOUT | 4.268 | 4.4 | 4.532 | V | VIN＝6V，IOUT＝1mA | 3 |
| Output current | IOUT | 60 | 100 | mA | VIN＝6.4V | 3 | |
| Load regulation | ΔVOUT | 60 | 150 | mV | VIN＝6.4V，1mA≤IOUT≤30mA | 3 | |
| Quiescent current | ISS | 2 | 3 | µA | VIN＝6.4V，空载 | 3 | |
| Input voltage | VIN | 18 | V | 3 | |||
| Maximum input voltage | VIN | 20 | V | 2 | |||
| Power dissipation | PD | 200 | mW | 2 | |||
| Operating temperature | Tw | -25 | 70 | ℃ | 2 | ||
| Storage temperature | Tc | -50 | 125 | ℃ | 2 | ||
| Soldering temperature | Th | 260 | ℃ | 10s | 2 | ||
| Output voltage tolerance (product selection table) | -3 | 3 | % | Printed as +3% in the model selection table for the output voltage | 1 | ||
| Dropout voltage | VDIF | 100 | mV | IOUT＝1mA | 3 | ||
| Line regulation | ΔVOUT /(ΔVIN * VOUT) | 0.2 | ％/V | 5.4V≤VIN≤18V，IOUT＝1mA | 3 | ||
| Output voltage temperature coefficient | ΔVOUT /ΔTa | 0.7 | mV/℃ | VIN＝6.4V，IOUT＝10mA，0℃≤Ta≤70℃ | 3 |
CAD (KiCad official)
- Symbol:
HX7544 - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
hx7544-etched.step/hx7544-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);hx7544.step/hx7544.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: HX hengjiaxing datasheet (9 pp, sha256
a346bc691aa07bf5, retrieved 2026-10-19, 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).