The UP0104S uses a standard with 8 pins. A notable design feature is its internal wiring, which uses multiple bonding wires to carry higher currents. The main current flows through pins 3 and 6 , which are connected to the internal die with four bonding wires each to handle up to 2.4A of current. The internal wiring (bonding wires) is visible under a microscope after decapping the IC.
: Shuts down the device if the output voltage exceeds safe limits.
If you tell me the 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
| Channel | Typical Use | VOUT (DDR2/3/4) | FB Resistors (approx) | |---------|-------------|----------------|------------------------| | CH1 | VDDQ (mem) | 1.8V / 1.5V / 1.2V | 2k & 1k / 1.5k & 1k / 1k & 1k | | CH2 | VTT (term) | 0.9V (half VDDQ) | Fixed internal or ext divider | Up0104s Datasheet
The UP0104S is an packaged in a small, surface-mount SOP-8 package. It is designed to handle power management tasks efficiently. Key Characteristics: Manufacturer: uPI Semiconductor Corp / UIMICRO Package Type: SOP-8 (Small Outline Package, 8 pins) Operating Temperature Range: TAcap T sub cap A RoHS Status: Lead-free / RoHS Compliant
: The device is specified to operate within an extended temperature range of -40°C to 105°C
The UP0104S is a specialized integrated circuit (IC) that frequently appears in discussions among computer hardware enthusiasts and electronics repair professionals. Despite its widespread use, official documentation can be challenging to locate. This guide serves as a comprehensive resource, compiling technical information, application data, and practical insights from a variety of sources to serve as a reference datasheet for the UP0104S. The UP0104S uses a standard with 8 pins
: Standard SOP-8 (Small Outline Package) / SSW8 surface-mount footprint.
| Parameter | Value/Description | |-----------|-------------------| | Input voltage (VCC) | 5V or 12V (typical application) | | Output voltage range | 0.6V to VCC – 2V | | Output current | Limited by external MOSFETs (up to ~15A per channel) | | Switching frequency | Adaptive on-time, varies with VIN/VOUT (typical 300–500 kHz) | | Number of channels | 2 (independent outputs) | | Synchronous rectification | Yes (built-in drivers for high-side & low-side MOSFETs) | | Protection features | UVLO, OCP (cycle-by-cycle), OVP, thermal shutdown | | Package | SOP-14 / TSSOP-14 (varies by suffix) |
Housed primarily in a surface-mount SOP-8 (Small Outline Package) or QFN-10 configuration for space-constrained PCBs. The internal wiring (bonding wires) is visible under
Pins left open internally to isolate high-voltage layout paths.
When reviewing the UP0104S datasheet, several key features stand out:
Power Management IC (PMIC) / Linear Regulator / Signal Conditioning. Pin Configuration & Functionality (SOP-8)
: Rated for an extended range of -40°C to 105°C ( TAcap T sub cap A ) .