If you are integrating the UP0104S into a new PCB, the datasheet offers critical layout guidelines.
The uP0104 series represents a robust solution for power regulation in consumer electronics. While newer LDOs offer lower dropout voltages and lower quiescent currents, the uP0104 remains a cost-effective and reliable choice for general-purpose voltage regulation where efficiency requirements are moderate. Up0104s Datasheet
In the world of power supply design, few components are as critical—or as widely misunderstood—as the PWM (Pulse Width Modulation) controller. Among the myriad of options available to engineers and repair technicians, the UP0104S stands out as a highly specialized, dual-output controller. While not a household name, this IC is a workhorse found on numerous motherboards, graphics cards, and embedded systems, particularly those manufactured in the late 2000s and early 2010s. If you are integrating the UP0104S into a
If you are searching for the UP0104S datasheet, you are likely facing one of three scenarios: designing a low-voltage power rail, troubleshooting a dead motherboard with missing VCORE, or attempting a repair on a GPU that refuses to power up. This article serves as an exhaustive resource—synthesizing the critical electrical characteristics, pinout, application circuits, and troubleshooting tips found in the official technical documentation. In the world of power supply design, few
The UP0104S is most commonly deployed in a dual, synchronous buck converter configuration. Below is an explainer of the reference design from the datasheet.
| 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 |