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LTspice power supply design. LTspice adds enhancements and models to SPICE, significantly reducing simulation time compared to typical SPICE simulators, allowing one to view waveforms for most switching regulators in minutes compared to hours for otherยฎ^ is a high performance SPICE simulator, schematic capture and waveform viewer designed to speed the process of
SPICE simulators.
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n SimulatorFree Analog Circuit
n Unlimited Nodes/Nets
n (^) Fast Simulations
LTspice
Follow @ LTspice on Twitter for up-to-date information on models, demo circuits, events and user tips. Included in the download is a complete and fully functional SPICE program, help files, macro models for Linear Technologyโs power products, over 200 op amp models, as well as models for resistors, transistors and MOSFETs.
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LTspice HotKeys
Schematic
Symbol
Waveform
Netlist
ESC - Exit Mode Modes
ESC - Exit Mode
F3 โ Draw WireF5 โ Delete
F5 โ Delete
F5 โ Delete
F6 โ Duplicate
F6 โ Duplicate
F7 โ Move
F7 โ Move
F8 โ Drag
F8 โ Drag
F9 โ Undo
F9 โ Undo
F9 โ Undo
F9 โ Undo
Shift+F9 โ Redo
Shift+F9 โ Redo
Shift+F9 โ Redo
Shift+F9 โ Redo
Ctrl+Z โ Zoom Area View
Ctrl+Z โ Zoom Area
Ctrl+Z โ Zoom Area
Ctrl+B โ Zoom Back
Ctrl+B โ Zoom Back
Ctrl+B โ Zoom Back
Space โ Zoom Fit
Ctrl+E โ Zoom Extents
Ctrl+G โ Toggle Grid
Ctrl+G โ Toggle Grid
Ctrl+G โ Goto Line #
U โ Mark Unncon. Pins
Ctrl+W โ Attribute Window
โ0โ - Clear
A โ Mark Text Anchors
Ctrl+A โ Attribute Editor
Ctrl+A โ Add Trace
Atl+Click - Power
Ctrl+Y โ Vertical Autorange
Ctrl+R โ Run Simulation
Ctrl+Click - Attr. Edit
Ctrl+Click - Average
Ctrl+H โ Halt Simulation
Ctrl+H โ Halt Simulation
Ctrl+H โ Halt Simulation
R โ Resistor Place
R โ Rectangle
C โ Capacitor
C โ Circle
L โ Inductor
L โ Line
D โ Diode
A โ Arc
G โ GNDS โ Spice DirectiveT โ Text
T โ Text
F2 โ ComponentF4 โ Label NetCtrl+E โ Mirror
Ctrl+E โ Mirror
Ctrl+R โ Rotate
Ctrl+R โ Rotate
Command Line Switches Flag
Short D escription -ascii
Use A SCII. r aw l es. ( D egrades p erformance!) -b
Run in b atch mode. -big or - max
Start as a maximized window. -encrypt
Encrypt a model l ibrary. -FastAccess
Convert a b inary. r aw l e to F ast A ccess F ormat. -netlist
Convert a schematic to a netlist. -nowine
Prevent u se of W I N E ( Linux) workarounds. -PCBnetlist
Convert a schematic to a P CB netlist. -registry
Store u ser p r eferences in the r egistry. -Run
Start simulating the schematic on open. -SOI
Allow M O SFETโs to have u p to 7 nodes in subcircuit.
-uninstall
Executes one step of the u ninstallation p r ocess. -wine
Force u se of W I N E ( Linux) workarounds.
Simulator D irectives - D ot CommandsCommand
Short D escription .AC
Perform a Small Signal A C A nalysis .BACKANNO
Annotate the Subcircuit P in N ames on P ort currents .DC
Perform a D C Source Sweep A nalysis .END
End of N etlist .ENDS
End of Subcircuit D e nition .FOUR
Compute a F ourier Component .FUNC
User D e ned F u nctions .FERRET
Download a F ile G iven the U R L .GLOBAL
Declare G l obal N odes .IC
Set I nitial Conditions .INCLUDE
Include another F ile .LIB
Include a Library .LOADBIAS
Load a P r eviously Solved D C Solution .MEASURE
Evaluate U ser-De ned E l ectrical Q u antities .MODEL
De ne a SPICE M odel .NET
Compute N etwork P arameters in a. A C A nalysis .NODESET
Supply H ints f or I nitial D C Solution .NOISE
Perform a N oise A nalysis .OP
Find the D C O p erating P oint .OPTIONS
Set Simulator O p tions .PARAM
User-De ned P arameters .SAVE
Limit the Q u antity of Saved D ata .SAVEBIAS
Save O p erating P oint to D isk .STEP
Parameter Sweeps .SUBCKT
De ne a Subcircuit .TEMP
Temperature Sweeps .TF
Find the D C Small-Signal T r ansfer F u nction .TRAN
Do a N onlinear T r ansient A nalysis .WAVE
Write Selected N odes to a. W A V l e Suf x
Suf x f1e- T1e
p1e- G1e
n1e- Meg1e
u1e- K1e
M1e-3 Mil25.4e-
ConstantsE2.7182818284590452354 Pi3.14159265358979323846 K1.3806503e-23 Q1.602176462e-19 TRUE^1 FALSE^0
LTspice
See Demo
0417C
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n^ 1-800-4-LINEAR
