Up0104s Datasheet May 2026

The UP0104S is a high-performance integrated circuit (IC) primarily used in power management and signal buffering. Often found in modern motherboards and automotive systems, it is manufactured by uPI Semiconductor Corp (sometimes listed via distributors as UIMICRO).

The following blog post breaks down the technical specifics found in the UP0104S datasheet to help engineers and hobbyists integrate it into their designs. Deep Dive: The UP0104S Power Management IC

For anyone working on high-density electronics, finding a reliable, space-saving power solution is a constant challenge. The UP0104S steps into this role as a versatile IC designed for stability and efficiency. ⚡ Key Technical Specifications

The UP0104S is built for durability and precision. According to the standard UP0104S Product Details, its core specs include:

Package Type: Available in a compact SOP-8 or QFN-10 footprint, making it ideal for space-constrained PCB layouts.

Operating Temperature: Rated for an extended range of -40°C to 105°C, suitable for demanding industrial or automotive environments.

Voltage Handling: Capable of handling significant drain-source voltages (up to -100V in some FET-based configurations) and standard logic-level gate-source voltages. 🛠️ Common Applications You will most likely encounter this chip in: Up0104s Datasheet

Enterprise Systems: High-performance computing and data centers.

Automotive Electronics: Hybrid and electric powertrain management.

Motherboard Power Regulation: Often used to manage 5VDUAL voltage planes and sleep states (ACPI compliance).

Signal Integrity: Specifically designed to minimize parasitic capacitance in high-speed data transmission lines. 📋 Understanding the Pin Configuration

The "S" variant of the UP0104 series is unique because its pin arrangement is optimized for high-density interconnects. While the "P" variant (UP0104P) is a standard drop-in for legacy systems, the UP0104S features a layout intended to reduce signal interference. 💡 Design Tips for Engineers Avoid Mixing Variants: Do not swap the Go to product viewer dialog for this item.

with the UP0104P without checking your schematic; the pin assignments differ to optimize power delivery vs. signal integrity. The UP0104S is a high-performance integrated circuit (IC)

Thermal Management: Use the SOP-8's thermal pad (if present) to manage heat during high-speed switching tasks. Procurement: You can find the

at specialized distributors like Worldway Electronics or through retailers like Alibaba and eBay.

💡 Pro-Tip: Always verify the "Marking Code" on the physical chip, as these small SOP-8 packages can sometimes share similar physical appearances with other uPI regulators.

If you tell me the specific device you are repairing or designing (e.g., a laptop motherboard, an IoT sensor), I can provide more tailored schematic advice or equivalent replacement suggestions. UP0104S - UPI Semiconductor Corp - Worldway Electronics

"UP0104S Datasheet"

The UP0104S is a specific part number, and a datasheet is a document that provides detailed information about the component's specifications, features, and applications. Online search: You can try searching for "UP0104S

If you're looking for the actual datasheet, I can suggest some possible sources:

• Online search: You can try searching for "UP0104S Datasheet" on popular search engines or websites that specialize in electronic components, such as Digi-Key, Mouser, or Alldatasheet.
• Manufacturer's website: If you know the manufacturer of the component, you can visit their website and search for the datasheet.

Part 2: UP0104S Pinout and Functional Description

No datasheet is complete without a detailed pin diagram. Below is the standard pin assignment for the SOP-14 package. Understanding this pinout is essential for both PCB layout and failure analysis.

3. Pinout (SOP-8 – typical assignment)

| Pin | Name | Description | |-----|---------|-------------------------------------| | 1 | BOOT | Bootstrap cap for high-side gate | | 2 | UGATE | High-side MOSFET gate drive | | 3 | GND | Ground | | 4 | LGATE | Low-side MOSFET gate drive | | 5 | VCC | IC power supply (typically 5V or 12V)| | 6 | FB | Feedback input (to Vout divider) | | 7 | COMP | Compensation network (loop stability)| | 8 | PHASE | Switching node (between MOSFETs) |

⚠️ Always verify pinout from your specific datasheet – minor variations exist.

Component Selection Guide

• Inductors: 1µH to 10µH. Saturation current rating must exceed peak load current + 30%.
• MOSFETs: Use logic-level N-Channel MOSFETs with VGS(th) < 4V. Examples: 2N7002 (small) or Si4848 (high current).
• Output Capacitors: Low-ESR ceramic (X5R or X7R) or polymer capacitors. Total capacitance: 100µF to 1000µF per channel.

UP0104S Datasheet — Detailed Overview

Typical application circuit

• Input decoupling: ceramic capacitor (e.g., 4.7–10 µF) close to VIN and GND
• Switching node: small ferrite bead/inductor per recommended value (e.g., 1–4.7 µH) and Schottky or synchronous MOSFET internal depending on variant
• Output filter: ceramic capacitors (e.g., 22–47 µF) with low ESR for regulator stability
• Feedback divider: two resistors to set VOUT if adjustable version used
• Layout notes: short traces on SW node, large ground plane, and thermal vias under package for heat

Design considerations

• Select external inductor and capacitors per manufacturer recommendations to ensure stability and efficiency; values depend on desired VOUT and load.
• Ensure FB resistor values balance between low noise susceptibility and minimal quiescent current draw.
• Verify thermal performance for sustained high current; use PCB copper and vias to spread heat.
• For battery-powered designs, use EN and low-quiescent modes to minimize standby drain.
• Confirm protection-mode behavior (hiccup vs. latch) to match system recovery needs.

5. Output Voltage Setting

Both channels use an internal 0.6V reference.
VOUT = 0.6 × (1 + Rtop / Rbottom)

Example: For 1.8V (DDR VDDQ), use Rtop = 2kΩ, Rbottom = 1kΩ.