HT33

XCH(旭昌辉) · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23

HT33 from XCH(旭昌辉), 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 reference pin for the regulator; the datasheet's pin function table lists it as ground (地).
2	VOUT	power_out	Regulated output; the datasheet requires an output-to-ground capacitor greater than 2.2 µF, with tantalum recommended, and the output is held at the set voltage (2.8 V to 9.0 V range across the series, 3.3 V for HT33).
3	VIN	power_in	Input supply pin; the absolute maximum VIN is -0.3 V to +26 V and the stated input voltage limit is 24 V, and capacitors should be placed close to the VIN and VOUT pins.

Key specifications

Parameter	Value
Manufacturer	XCH(旭昌辉)
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	3.234	3.3	3.366	V	VIN=VOUT+2.0V, IOUT=10mA	4
Output voltage accuracy		-2		2	%		1
Output current	IOUT	70	100		mA	VIN=VOUT+2.0V	4
Quiescent current	ISS		1.5	3	μA	No load	4
Dropout voltage	VDIF		25	55	mV	IOUT=1mA, ΔVOUT=2%	4
Load regulation	ΔVOUT		25	60	mV	VIN=VOUT+2.0V, 1mA≤IOUT≤50mA	4
Line regulation	ΔVOUT/VOUT*ΔVIN			0.2	%/V	VOUT+1.0V≤VIN≤24V, IOUT=1mA	4
Input voltage	VIN			24	V		4
Input voltage (absolute maximum)	VIN	-0.3		26	V		2
Storage temperature	TSTG	-50		125	℃		2
Operating temperature	TA	-40		85	℃		2
Output voltage temperature coefficient	ΔVOUT/ΔTA*VOUT		100		ppm/℃	VIN=VOUT+2.0V, IOUT=10mA, -40℃≤TA≤85℃	4

CAD (KiCad official)

Symbol: HT33
Footprint: Package_TO_SOT_SMD:SOT-23
3D model: SOT-23 (KiCad packages3D, STEP)
3D model files: ht33-etched.step / ht33-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ht33.step / ht33.glb are the bare package body.

Provenance

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

Datasheet: XCH(旭昌辉) datasheet (9 pp, sha256 b1c696830fe50759, 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

# HT33

**XCH(旭昌辉)** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23

HT33 from XCH(旭昌辉), 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 reference pin for the regulator; the datasheet's pin function table lists it as ground (地). |
| 2 | VOUT | power_out | Regulated output; the datasheet requires an output-to-ground capacitor greater than 2.2 µF, with tantalum recommended, and the output is held at the set voltage (2.8 V to 9.0 V range across the series, 3.3 V for HT33). |
| 3 | VIN | power_in | Input supply pin; the absolute maximum VIN is -0.3 V to +26 V and the stated input voltage limit is 24 V, and capacitors should be placed close to the VIN and VOUT pins. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | XCH(旭昌辉) |
| 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 | 3.234 | 3.3 | 3.366 | V | VIN=VOUT+2.0V, IOUT=10mA | 4 |
| Output voltage accuracy |  | -2 |  | 2 | % |  | 1 |
| Output current | IOUT | 70 | 100 |  | mA | VIN=VOUT+2.0V | 4 |
| Quiescent current | ISS |  | 1.5 | 3 | μA | No load | 4 |
| Dropout voltage | VDIF |  | 25 | 55 | mV | IOUT=1mA, ΔVOUT=2% | 4 |
| Load regulation | ΔVOUT |  | 25 | 60 | mV | VIN=VOUT+2.0V, 1mA≤IOUT≤50mA | 4 |
| Line regulation | ΔVOUT/VOUT*ΔVIN |  |  | 0.2 | %/V | VOUT+1.0V≤VIN≤24V, IOUT=1mA | 4 |
| Input voltage | VIN |  |  | 24 | V |  | 4 |
| Input voltage (absolute maximum) | VIN | -0.3 |  | 26 | V |  | 2 |
| Storage temperature | TSTG | -50 |  | 125 | ℃ |  | 2 |
| Operating temperature | TA | -40 |  | 85 | ℃ |  | 2 |
| Output voltage temperature coefficient | ΔVOUT/ΔTA*VOUT |  | 100 |  | ppm/℃ | VIN=VOUT+2.0V, IOUT=10mA, -40℃≤TA≤85℃ | 4 |

## CAD (KiCad official)

- Symbol: `HT33`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `ht33-etched.step` / `ht33-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ht33.step` / `ht33.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [XCH(旭昌辉) datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8602845385580683264) (9 pp, sha256 `b1c696830fe50759`, 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/ht33-datasheet.pdf)