Typically configured as a fixed 1.2V positive regulator or adjustable depending on specific sub-variants.
Understanding the standard pin structure of the uP0104S is critical for circuit design and board diagnostics. Pin Number Description Power Good indicator output / Chip Enable logic input. 2 Control Circuit Supply Voltage (Powers internal logic). 3 Main Power Input (High-current supply input line). 4 VREF / ADJ Voltage Reference or feedback adjustment pin. 5 No Internal Connection (No internal bond wire to the die). 6 Regulated Output Voltage (High-current output line). 7 Ground Reference. 8 Feedback pin for output voltage monitoring. 9 (Pad) Thermal Pad
The is a dual-output, constant-on-time (COT) synchronous DC-DC buck controller. It is designed to provide high-efficiency, low-output-voltage power supplies with fast transient response. Its typical applications include:
📌 UP0104S SOP-8 Pinout Top View +---U---+ Pin 1 | | Pin 8 Pin 2 | | Pin 7 Pin 3 | | Pin 6 Pin 4 | | Pin 5 +-------+ Up0104s Datasheet
The UP0104S is a critical yet often overlooked component in modern computing hardware. Its role in delivering stable, low-noise voltage rails makes it essential for the proper function of motherboards and graphics cards. While its documentation is not as widespread as other ICs, understanding its function, common failure modes, and troubleshooting techniques can be invaluable for anyone involved in electronics repair. Whether you're diagnosing a "no power" condition on a motherboard or repairing a graphics card, the UP0104S is a chip well worth knowing.
Veswin Electronics lists the part with links to pinout and circuit diagrams.
Based on the analysis of the UP0104 datasheet, we recommend: Typically configured as a fixed 1
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:
The UP0104S belongs to a family of regulators (including the UP0104P, T, and R) designed for stability and precision in complex signal-processing environments.
The uP0104 is a high-performance, low-dropout voltage regulator designed to maintain a stable output voltage with a minimal input-output differential voltage. It is typically available in fixed voltage versions (e.g., 3.3V, 5.0V) and features an internal current limiting circuit and thermal shutdown protection. Its primary use case is converting higher DC voltages (such as from a battery or wall adapter) into stable logic-level voltages for microcontrollers and sensors. 2 Control Circuit Supply Voltage (Powers internal logic)
The UP0104S datasheet provides a wealth of information about this high-performance electronic component. With its impressive features, technical specifications, and versatility, the UP0104S is an excellent choice for a wide range of applications. By understanding the intricacies of the UP0104S datasheet, designers and engineers can unlock its full potential, creating innovative and reliable designs that meet the demands of today's fast-paced technological landscape.
If you are currently designing a circuit around this regulator, let me know: What your targeted are The maximum load current your downstream components require
The UP0104S is purpose-built for generating low-voltage power rails in various PC components. It is found in:
The uP0104S is housed in a compact package format. This specific IC layout is engineered to minimize parasitic capacitance, making it highly effective for high-speed data transmission lines and steady standby power rails. Specification Detail Manufacturer uPI Semiconductor Corp / UIMICRO Package Type SOP-8 / SOIC-8 Operating Temperature Range -40°C to 105°C ( TAcap T sub cap A Primary Function