Schematic Symbol for MP2162 Reference Design: A power management...

Role of L1 in Buck Regulator

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Schematic

Using Schematic Tool.

In this MP2162 buck regulator, /monolithicpower/MP2162-Reference-Design is the power inductor of the switching power stage.

What it does:

Stores energy when /monolithicpower/MP2162-Reference-Design’s SW switch turns on, then releases that energy to the output when the switch turns off.
Together with the output capacitor /monolithicpower/MP2162-Reference-Design, it filters the switching waveform at SW into a steady DC output on Net 4 (+1V2).
Sets the inductor ripple current and affects transient response and efficiency.

How it’s connected here:

/monolithicpower/MP2162-Reference-Design.P1 is tied to /monolithicpower/MP2162-Reference-Design SW on Net 5 (the switching node).
/monolithicpower/MP2162-Reference-Design.P2 goes to Net 4, which is the regulated output rail (+1V2), shared with /monolithicpower/MP2162-Reference-Design OUT, /monolithicpower/MP2162-Reference-Design, and the sense network via /monolithicpower/MP2162-Reference-Design//monolithicpower/MP2162-Reference-Design.

Notable property:

Inductance: 1 µH (as set on /monolithicpower/MP2162-Reference-Design), which is typical for high-frequency, low-voltage buck converters like the MP2162 to balance ripple current and transient performance.

In short: /monolithicpower/MP2162-Reference-Design is the main energy storage/filter element that converts the SW node’s pulsed voltage into the smooth +1.2 V output.

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Inductance

1u H

VIN

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Overlapping Copper

Reports copper elements that are shorting.

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Reports parts that have no footprint.

Invalid Layer

Reports nodes that are assigned to a layer that doesn't exist in the layout stackup.

Component Overrides • 7

	Designator	Ruleset
	＊`REF`＊	Override rule for ＊`REF`＊
	＊`REF`＊	Override rule for ＊`REF`＊
	＊`REF`＊	Override rule for ＊`REF`＊
	＊`REF`＊	Override rule for ＊`REF`＊
	＊`REF`＊	Override rule for ＊`REF`＊
	＊`REF`＊	Override rule for ＊`REF`＊
	QFN_8_2X1P5_MNP	Override rule for QFN_8_2X1P5_MNP

Airwires

Reports missing routed traces between pads in a net.

Deprecated Rules

Reports nodes that are using rules that are not supported anymore.

Layers with Multiple Fills

Reports layers that have multiple copper fills of different nets. Make sure the Connected Layers rule value of nets with fills is valid.

Floating Copper

Detect any via, trace or copper fill island that is not connected to any net.

Protected Intrusions

Reports intrusions from objects of other nets into polygons or fills that have the Protected layout rule applied.

Manufacturing

Manufacturer Part Number • 5

	Designator	MPN
	C1	None
	C2	None
	L1	None
	R1	None
	R2	None

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A common return path for electric current. Commonly known as ground.
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