UM14233S

Union Semiconductor · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-3

UM14233S from Union Semiconductor, 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	Ground.
2	VOUT	power_out	Voltage regulated output (3.3V for UM14233S); a 1µF tantalum or 6.8µF ceramic output capacitor is recommended for stability.
3	VDD	power_in	Supply voltage input, 12V recommended maximum and 14V absolute maximum, with a 1µF input capacitor recommended.

Key specifications

Parameter	Value
Manufacturer	Union Semiconductor
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
Output Voltage Accuracy		-3		3	%	IOUT=300mA	6
Output Voltage Temperature Coefficient	ΔVOUT/ΔT·VOUT	-100		100	ppm/°C	IOUT=10mA	6
Line Regulation	ΔVOUT/ΔVIN·VOUT		0.05	0.2	%/V	IOUT=10mA 4V≤VDD≤6V	6
Supply Current	IS		8	15	μA	VIN=Set VOUT+1V VOUT Floating	6
Max Input Voltage	VIN			14	V		5
Max Input Voltage	VIN			12	V		5
Power Dissipation	PD			250	mW		5
Operating Junction Temperature	TJ			125	°C		5
Ambient Temperature	TA	-40		85	°C		5
Storage Temperature Range	TSTG	-40		150	°C		5
Lead Temperature for Soldering	TL			260	°C	10 Seconds	5
Load Regulation	ΔVOUT		60		mV	VIN=Set VOUT+1V 1mA≤IOUT≤300mA	6
Maximum Output Current	IOUT (Max)		300		mA	VIN-VOUT=1V	6
Dropout Voltage	VDROP		270		mV	IOUT=150mA	6
Power Supply Ripple Rejection	PSRR		60		dB	f=100Hz, Ripple=0.5Vp-p, VIN=Set VOUT+1V	6
Output Voltage	VOUT		3.3		V		3

CAD (KiCad official)

Symbol: UM14233S
Footprint: Package_TO_SOT_SMD:SOT-23-3
3D model: SOT-23-3 (KiCad packages3D, STEP)
3D model files: um14233s-etched.step / um14233s-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); um14233s.step / um14233s.glb are the bare package body.

Provenance

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

Datasheet: Union Semiconductor datasheet (10 pp, sha256 efefd5351aec9444, retrieved 2026-10-19, tier: lcsc)
Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-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

# UM14233S

**Union Semiconductor** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-3

UM14233S from Union Semiconductor, 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 | Ground. |
| 2 | VOUT | power_out | Voltage regulated output (3.3V for UM14233S); a 1µF tantalum or 6.8µF ceramic output capacitor is recommended for stability. |
| 3 | VDD | power_in | Supply voltage input, 12V recommended maximum and 14V absolute maximum, with a 1µF input capacitor recommended. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Union Semiconductor |
| 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 |
|---|---|---|---|---|---|---|---|
| Output Voltage Accuracy |  | -3 |  | 3 | % | IOUT=300mA | 6 |
| Output Voltage Temperature Coefficient | ΔVOUT/ΔT·VOUT | -100 |  | 100 | ppm/°C | IOUT=10mA | 6 |
| Line Regulation | ΔVOUT/ΔVIN·VOUT |  | 0.05 | 0.2 | %/V | IOUT=10mA 4V≤VDD≤6V | 6 |
| Supply Current | IS |  | 8 | 15 | μA | VIN=Set VOUT+1V VOUT Floating | 6 |
| Max Input Voltage | VIN |  |  | 14 | V |  | 5 |
| Max Input Voltage | VIN |  |  | 12 | V |  | 5 |
| Power Dissipation | PD |  |  | 250 | mW |  | 5 |
| Operating Junction Temperature | TJ |  |  | 125 | °C |  | 5 |
| Ambient Temperature | TA | -40 |  | 85 | °C |  | 5 |
| Storage Temperature Range | TSTG | -40 |  | 150 | °C |  | 5 |
| Lead Temperature for Soldering | TL |  |  | 260 | °C | 10 Seconds | 5 |
| Load Regulation | ΔVOUT |  | 60 |  | mV | VIN=Set VOUT+1V 1mA≤IOUT≤300mA | 6 |
| Maximum Output Current | IOUT (Max) |  | 300 |  | mA | VIN-VOUT=1V | 6 |
| Dropout Voltage | VDROP |  | 270 |  | mV | IOUT=150mA | 6 |
| Power Supply Ripple Rejection | PSRR |  | 60 |  | dB | f=100Hz, Ripple=0.5Vp-p, VIN=Set VOUT+1V | 6 |
| Output Voltage | VOUT |  | 3.3 |  | V |  | 3 |

## CAD (KiCad official)

- Symbol: `UM14233S`
- Footprint: `Package_TO_SOT_SMD:SOT-23-3`
- 3D model: SOT-23-3 (KiCad packages3D, STEP)
- 3D model files: `um14233s-etched.step` / `um14233s-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `um14233s.step` / `um14233s.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Union Semiconductor datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603006112812064768) (10 pp, sha256 `efefd5351aec9444`, retrieved 2026-10-19, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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/um14233s-datasheet.pdf)