Voltage Regulator Schematic Design
Thought
Work done
- None of the footprint or DRC rules have been configured yet; component placement and routing have not started.
Remaining tasks
- Footprint & Rule Configuration
- Verify footprints of Q1–Q4, U3, U7, U8, T1, L1, C11, etc., match the 4-layer stackup.
- Apply high-voltage clearances (5 mm) and creepage (8 mm) to HV nets, and logic clearances (1 mm) and creepage (2 mm) to low-voltage nets.
- Define isolation keepouts and assign dedicated layers for the LM331/TL431 control nets and ADUM1201 interface.
- Component Placement
- Cluster Q1–Q4 with L1/C11.
- Place T1, C9, C10 near the HV bus.
- Enforce isolation gap for U5 (ADUM1201), U4, U7, U8.
- Position decoupling/snubber caps (100 nF, 1 µF, 10 µF) close to their devices.
- Routing Strategy
- Route HF loops (Q1–Q4, L1, C11) with wide, short traces.
- Keep L1–C11 loop intact on uninterrupted copper.
- Route LM331/TL431 nets on quieter layers with dedicated returns.
- Create an isolated path for the ADUM1201 interrupter signal.
- Design Review & DRC
- Run Flux DRC to confirm clearances, creepage, spacing.
- Verify test points and labeling.
- Manufacturability Review
- Validate spacing for CNC tolerances.
- Document special instructions for HV isolation and test points.
Success criteria review
- None of the targets (minimized HF loops, HV barrier, resonant-tank integrity, LF-path isolation, DRC pass) have been met yet.
Recommended next step
Begin with Footprint & Rule Configuration:
- Open the PCB rules editor and set up the HV and LV clearances/creepage rules.
- Audit key footprints to ensure layer assignments and pin mapping are correct.
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