Up0104s Datasheet <SAFE>

Selected for infotainment computing and advanced driver assistance systems (ADAS) due to its wide operating temperature capabilities.

If you are troubleshooting a failed chip, tell me it is on (motherboard, GPU, etc.) and what voltage readings you are getting on pins 3 and 6. I can help you confirm if the chip is shorted or trace the power issue. Share public link

The UP0104S is a reliable, cost-effective dual controller. When repairing a motherboard with no memory or chipset voltage, checking this IC’s pins is a quick diagnostic step. Always verify the exact suffix (e.g., UP0104S vs UP0104S-A) as pinout or features may vary slightly.

Based on the UP0104S datasheet, some of the key features of the device include:

Based on technical documentation and community repair guides, here are the primary characteristics of the UP0104 series: Low-dropout (LDO) linear regulator. Output Current: Capable of handling up to 2.4A . Up0104s Datasheet

| Pin # | Name | Function | | :--- | :--- | :--- | | 1 | FB2 | Feedback input for Channel 2. Connects to a resistor divider from VOUT2. | | 2 | COMP2 | Compensation pin for Channel 2 (connects to RC network for loop stability). | | 3 | SS2 | Soft-start capacitor for Channel 2. Capacitor value sets startup time. | | 4 | VCC | Supply voltage input (typically 5V or 12V). Bypass with 0.1µF & 10µF. | | 5 | EN2 | Enable for Channel 2. High (>2V) = Enabled. Low (<0.8V) = Disabled. | | 6 | GND | Ground reference. | | 7 | UGATE2 | High-side gate drive output for Channel 2 (connects to top MOSFET). | | 8 | LGATE2 | Low-side gate drive output for Channel 2 (connects to sync MOSFET). | | 9 | PHASE2 | Switch node for Channel 2 (connects to source of high-side MOSFET). | | 10 | LGATE1 | Low-side gate drive output for Channel 1. | | 11 | UGATE1 | High-side gate drive output for Channel 1. | | 12 | PHASE1 | Switch node for Channel 1. | | 13 | EN1 | Enable for Channel 1. | | 14 | COMP1/REFIN | Compensation for Channel 1 or external reference input. |

For engineers and hobbyists, finding an authentic datasheet can be challenging as uPI Semiconductor often restricts full public access. However, detailed technical summaries and CAD models are available through distributors like Veswin and Worldway Electronics .

The UP0104S is a known component on these devices, among many others:

If this document does not match the component you are looking for, please verify the part number: Share public link The UP0104S is a reliable,

: A resource for viewing pinouts, pin voltages, and schematic diagrams for the UP0104S. Usage Precautions

Since the exact manufacturer varies (commonly or similar), this write-up consolidates typical specifications.

: Frequently found in boards like the MSI GTX 650 to handle local voltage regulation.

with the UP0104P without checking your schematic; the pin assignments differ to optimize power delivery vs. signal integrity. Based on the UP0104S datasheet, some of the

The UP0104S is frequently used in high-density interconnect applications where PCB space is limited. Common use cases include:

| | Name | Description | | :--- | :--- | :--- | | 1 | GND | Ground | | 2 | EN | Enable (active high). Requires a voltage >1.0V to turn on the chip. | | 3 | VIN | Input voltage supply. | | 4 | NC | No Connection, or not used. | | 5 | FB | Feedback. Connected to the output voltage divider. | | 6 | VOUT | Regulated output voltage. | | 7 | NC | No Connection, or not used. | | 8 | VOUT | Regulated output voltage (may be internally connected to pin 6). |

While traditional fixed regulators feature simple input/output structures, the uP0104S acts as a controller that drives internal or external nodes to provide tightly regulated voltages. For example, in typical motherboard standby implementations (such as MSI platforms), the operational path relies on standard pin assignments: