| Symptom | Likely Cause | Datasheet Checkpoint | | :--- | :--- | :--- | | | IC in UVLO or disabled | Measure EN1/EN2 (Pins 13 & 5). Must be >2.0V. Check VCC >4.3V (Pin 4). | | Output voltage too low | Feedback divider wrong or output short | Verify FB pin voltage (Pins 1 or 14). Should be exactly 0.8V. If lower, output is shorted or divider is incorrect. | | MOSFETs burning hot | Cross-conduction or wrong frequency | Check UGATE and LGATE dead-time (requires oscilloscope). Replace with matched MOSFETs from datasheet spec. | | Intermittent startup | SS capacitor leakage or unstable COMP | Inspect the soft-start capacitor (Pin 3 for Ch2, shared for Ch1). Leakage here prevents ramp-up. |
Delivers clean, low-ripple voltage to processors or memory modules. Up0104s Datasheet
If you're looking for a specific or an application circuit , I can try to find more specialized technical documentation. | Symptom | Likely Cause | Datasheet Checkpoint
For repair technicians, the datasheet is a diagnostic map. Here is how to leverage the UP0104S documentation to fix dead circuits. | | Output voltage too low | Feedback
: Look for uP0104S or UP0104SSW8 printed on top of the SOP-8 package.
Used to set the output voltage via a resistor divider or to enable/disable the chip. 4. Typical Application Circuit
Here is a summary of the UP0104S’s key specifications at a glance: