Power Systems And Regulation

How electronics get clean, correct power — the AC-to-DC supply chain, linear and switching regulators, battery systems and lithium safety, power-rail sequencing, and how power systems fail.

• 7.1DC Power Supply FundamentalsHow mains AC becomes clean DC — the transformer, rectifier, smoothing capacitor, and regulation chain, the ripple it fights, and the mains and charged-capacitor hazards behind it.IntermediateMedium Risk28 min read
• 7.2Linear Regulators — Theory and BehaviorHow a linear regulator holds a rail steady with a pass transistor and feedback, why it burns the excess voltage as heat, and how dropout, efficiency, and stability shape where it's used.IntermediateLow Risk28 min read
• 7.3Switching Regulators — Buck, Boost, Buck-BoostThe efficient alternative to the linear regulator — switch a transistor, store energy in an inductor, and step voltage down, up, or either way, with duty cycle setting the output and switching noise as the price.IntermediateLow Risk29 min read
• 7.4Battery Systems — Lithium Chemistry and ProtectionWhere portable power comes from — cells, capacity, and C-rate; why lithium's high energy density demands strict voltage limits, protection circuits, and careful charging; and how to handle it safely.IntermediateHigh Risk29 min read
• 7.5Power Rail SequencingWhy a multi-rail device must power its supplies up and down in a specific order — the latch-up and damage risks of getting it wrong, the sequencing methods, and the power-good and supervisor circuits that enforce it.IntermediateLow Risk27 min read
• 7.6Power System Failure ModesHow power systems actually break — dead rails, high ripple, wrong voltage, sag under load, overheating, sequencing and battery faults — and the input-to-load, test-under-load method that localizes them.IntermediateMedium Risk28 min read
• Chapter Quiz48questions · 80% required to continue