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HT7540-1
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UMW Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-89. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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HT7540-1
UMW · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89
HT7540-1 from UMW, in a SOT-89. 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 reference pin of the LDO regulator, shared by the input and output paths. |
| 2 | VIN | power_in | Regulator input supply pin; the maximum input voltage is 30 V per the limit parameters. |
| 3 | VOUT | power_out | Regulated output pin; the output voltage is 3.0 V to 5.0 V depending on the model (7540 nominal 4.0 V, 3.88 V to 4.12 V). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | UMW |
| Package | SOT-89 |
| Category | Power Management (PMIC) |
| Pins | 3 |
CAD (KiCad official)
- Symbol:
HT7540-1 - Footprint:
Package_TO_SOT_SMD:SOT-89-3 - 3D model: SOT-89 (KiCad packages3D, STEP)
- 3D model files:
ht7540-1-etched.step/ht7540-1-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ht7540-1.step/ht7540-1.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: UMW datasheet (15 pp, sha256
8a1946363b661b62, retrieved 2026-10-09, tier: lcsc) - 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).
# HT7540-1
**UMW** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89
HT7540-1 from UMW, in a SOT-89. 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 reference pin of the LDO regulator, shared by the input and output paths. |
| 2 | VIN | power_in | Regulator input supply pin; the maximum input voltage is 30 V per the limit parameters. |
| 3 | VOUT | power_out | Regulated output pin; the output voltage is 3.0 V to 5.0 V depending on the model (7540 nominal 4.0 V, 3.88 V to 4.12 V). |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | UMW |
| Package | SOT-89 |
| Category | Power Management (PMIC) |
| Pins | 3 |
## CAD (KiCad official)
- Symbol: `HT7540-1`
- Footprint: `Package_TO_SOT_SMD:SOT-89-3`
- 3D model: SOT-89 (KiCad packages3D, STEP)
- 3D model files: `ht7540-1-etched.step` / `ht7540-1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ht7540-1.step` / `ht7540-1.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [UMW datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8776077108550885376) (15 pp, sha256 `8a1946363b661b62`, retrieved 2026-10-09, tier: lcsc)
- **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/ht7540-1-datasheet.pdf)