LTspice Getting Started Guide
Contents
1. Seren ts e 7 TES Fate sae or m HAW rf S NL me Probing a Demo Circuit and Test Fixture Demo Circuits and Test Fixtures have INs and OUTs clearly labeled to help you quickly select them To view the waveform left click on IN and OUT Linear Technology LI spice SwitcherCAD III LTC3411 asc B File Edit Hierarchy View Simulate Tools Window Help M simulation mcderis not found pass Synch Release 7070000000000 oto toto toto tot sot tos t t s remains the customers rasponsliility to varify proper a and es operation in the actual applet c c c c c cc c c c rm substitution and printed zirzuit board layout may significantly atfect cirzutt AA c c oc oc oc ox Contact yo sales raprasantative Tor assletanca This mim paper ra customers only for oa all 200 Linear Technology ing AI rights sawed 0 L a 2008 Linear Technology y LINTAR TECHNOLOGY Voltage Differences Across Nodes Left click and hold on one node and drag the mouse Linear Technology Tspice SwitcherCAD 111 171371 Fie Edt Yiew Simulate Took Window Help to another node As OP Bay x3 Red voltage probe at the first node Black probe on the second Release Left button to plot V SW OUT 2008 Linear Technology 4 y LINEAR TECHNOLOGY AAA2. tran vu startup Cancel LI WIR Running a Circuit F j Linear Technology LTspice cherCAD III LTC3411 asc Sele K Hierarchy Vg Tools Window Hep SIE fo ac ax X Ba EX S8 c Fr EET models rotTound pss Eyncn E 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 07 7 7 7 0 7 0 07 t t tT it romaine the customers rasponslipilty to verity proper and rib operation in palo ad A NX Componsnt sutbstituton and printed erzu boerd may significant sTTect cirzutt parformence Tala your keal sas raprasantativs for sesistanos This cirzult Is Meiributed to customers only for uum ul LTE parte 0 202 Copyright 2005 Linear Technojogy ing All rghtsreespeed 0 0 0 0 0 0 0 l l ll s RA A If model is not found please Sync Release under Help menu to update LTIspice 2008 Linear Technology 47 INTAR TECHNOLOGY Probing a Circuit amp Waveform Viewer Left click on any wire to plot the voltage on the waveform viewer Voltage probe cursor Left click on the body of the component to plot the current on the waveform viewer Convention of positive current Is in the direction into the pin Current probe cursor 2008 Linear Technology en er war Technology L Tspice AD III L TLS BEE Edt yew oe pm ee Be Rasa Bo
3. Benefits of Using SwitcherCAD mn Stable SPICE circuit simulation with YUlperio Unlimited number of nodes Schematic symbol editor FR Waveform viewer Library of passive devices Fast simulation of switching mode power supplies SMPS Steady state detection Step response e Efficiency power computations Advanced analysis and simulation options Not covered in this presentation 2008 Linear Technology L TECHNOLOGY How Do You Get SwitcherCAD III LT spice Go to http www linear com software o Left click on download SwitcherCAD III LTspice Register for a new MyLinear account to receive updates if you have not done so already 2008 Linear Technology LT SPICE SWITCHERCAD LTspice SwitcherCAD III Download Sw cherCAD Wl Tspice Updated February 11 2008 SwitcherCAD lll is a high performance Spice Sw rCAD MT f simulator schematic capture and waveform viewer Sw AD WLT Hing Start wih enhancements and models for easing the simulation of switching regulators Our enhancements to Spice have made simulating switching regulators extremely fast compared to normal Spice simulators allowing the user to view waveforms for most switching regulators in just a few minutes Included in this download are Spice Macro Models for 8096 of Linear Technology s switching regulators over 200 op amp models as well as resistors transistors and MOSFET models Gett
4. Plot Planes Multiple plot panes can be displayed on one window to allow better separation between traces permitting different traces to be independently autoscaled Right click in the waveform pane Select Add Plot Pane Left click and hold to drag a label to a new plot pane F iLinear Technology LTspice SwitcherCAD 111 astable asc Yv He View Took Window Help ASH FF O QQQR LA Sex ORA AS mis AU nr r 4 0mA J 0m r 2e Oma m 1 0mA gt Ooms 7 lOms AAA Zooming In and Out in the Waveform Viewer SwitcherCAD TIT 1711371 Pl X S x 4T near Technology 1 e Swit SSS BI Ee e DE Bel Sei D zoom in Left click and hold as you drag a box about the region you wish to zoom in then release zoom out TA Right click and select Zoom to Fit or Zoom Back A E 10 x 1 x F jtinear Technology SwitcherCAD 5 12 250mA 4 File View Window Simulate Edi Help ee F 4 5 ejaja lx Ei Sa X Ra amp dj ne 2 Go gt 3 e D O oec Aa ep gt Zoom ln Pan Zoom Out LT UNEN Autoscale TECHNOLOGY Measuring Rippe and Time Frequency Drag a box about the region you wish to measure peak to peak over a period Left click and hold to drag a box over the portion of interest View the lower left hand side of the screen To avoid r
5. TECHNOLOGY Editing Circuit Elements e _ Duplicate Linear Technology SwitcherCAD 5Y 12 250mA 1372 a5c Bile View Window Simulate Edit Help al 410 alajajr lig Slee seen els 3 ala N 4 CCS ra E 3 yn Move Drag Undo Redo Left click on the desired editing option Left click on the circuit element LI WIR 2008 Linear Technology Editing Circuit Elements Attributes Right click on the component symbol to modify attributes Resistor R6 x Inductor L1 a Capacitor Cp1 Manufacturer Colcraft Manufacturer Part Number DD EDBP 222 Manufacturer Part Number Part Number Select Resistor Show Phase Dot Inductor Properties select Capacitor Resistor Properties Inductance H Lapacitor Properties Fieststance r1 Peak Currerit es le Series Voltage A atingi Power A atingia Parallel Hesistanice c RMS Current Riating A Parallel Capacitance F Equiv Series Resistance Series resistance defaults to 1 Equiv Seres Inductance H Equiv Parallel Hesistance C2 Equiv Parallel Capacitance F Mean Time Between Fallures hr Parts Per Package 2008 Linear Technology y LINEAR TECHNOLOGY Use Labels to Specify Units in Circuit Elements Attributes K k kilo 10 M me nmilli 10 3 MEG meg 10
6. U u micro 10 6 G 2g giga 10 N nano 10 9 T t terra 10 p pico 10 12 F f femto 10 15 2008 Linear Technology L ECHNOLOGY f Circuit Elements Database Inductor L1 Manufacturer Coilcratt Part Number O17 606P 222 Select Inductor Show Phase Dot Inductor ties uctance H Current uit and Edit Database Some components have an available database of manufacturers attributes e Resistors capacitors inductors diodes e Bipolar transistors MOSFET transistors JFET transistors Independent voltage and current sources configure a component to a manufacture s attributes Right click on the component symbol Left click on Select or Pick New e Left click on a selected device Left click on OK 2008 Linear Technology LL LINTAR Editing Voltage Sources and Loads Voltage Source Right click the voltage Voltage Source V2 DC value w po 04 4 Enter DC voltage value and Series Resistance optional Series Resistance Left click on OK Load current e Right click on the load mme symbol DC value 5 Enter DC current value Left click on OK 2008 Linear Technology L TECHNOLOGY Summary of Schematic Editor Toolbar Place Circuit Element Place Diode Place Inductor Place Capacitor Place Resistor Label Node Place Gro
7. is detected Automatically detect the steady state by checking the internal State of the macromodels Rerun simulation l 4 Linear Technology LTspice SwitcherCAD ja lim 163 F eiforin amp feces duran etre ee c ma on Efficency Calculation Stop Teme Tm Tiras to Scart Saving Data Turn off Semicond cap M iai T am oe a eee Stop wishing 4 teady slate detected 7 Le _ Edit Simulation Cmd Dont reset T eO hen steady sabe detected Skip intial operating pont soluto EE uA A ng ee E ek lup cin HecrhuPA CR A ar ue Lem 7 T O TO Srta an CT atop ophoro opbono _ i 3 EJ Du gl Li LI 1 LI E i 1 LI Li J LI E LI E Ee 4 H4 E H 4H BH UE E H 4 E HH d 4 d A Une 2008 Linear Technology Viewing Efficiency Report Left click on Simulate menu Left click on Efficiency Report Bar Zoom area 88 c E al a Pan Efficien Show Grid F Mark Unconn Pins BM of Materials cq Efficiency Report C2 Ah SPICE Netist Cpl sence Erer Log Cthp visible Traces L1 CT Autorange fren RZ May chang Waves R3 Set Probe Reference nS FF Status Bar Rth 107 Tooba FF Window Tabs Print the efficency report at the bottom of the schemabe 2008 Linear Technology Cuz cee i
8. tym coo by FerieBead Fa mesfel want to place it v A Mec GEW h ne ni a Left click to place it cn t end Reitera lad a inad of Feirteband bre pros FeurteB esi prod A Additional Circuit Elements Like Sources and Loads 47 Un EAD TECHNOLOGY 2008 Linear Technology Highlights of Additional Circuit Elements Left click on the Component symbol in the Schematic Editor Toolbar for a directory of additional circuit elements 4 4 Arbitrary behavioral source Voltage dependent voltage Current dependent current Voltage dependent current Current dependent voltage Independent current source JFET transistor Mutual inductance MOSFET transistor 2008 Linear Technology Lossy transmission line Bipolar transistor Voltage controlled switch Lossless transmission line Uniform RC line Independent voltage source Current controlled switch Subcircuit MESFET transistor Many more LI MOR Drawing Lines and Labeling Nodes near Techn ology rCAD III 5 12 250m4 1372 asc mi 4 708 Dravv Wire Place Ground Label Node Lines Left click on the Draw Wire in the Schematic Editor Toolbar e Left click a blue box terminal Define the line s path with a left click over intermediate points Left click on another blue box terminal 2008 Linear Technology y LINTAR
9. 1 asc E ET Too window Heo SIE 6 amp 6 our ETS DEM EM M Ra ar Technology Inc All rights reserved wLTs spice SwitcherCAD IN I fi 411 450 gt Gmulate Took Window Help Bill of Materials S Zoom groa Ref Mfg 2222 PartNo Description El Zoom Back C1 TOK C3225X5R0J228M capacitor 22uF 63V zoom C2 TOK C3225X5R0J226M capacitor 22uF 6 3V ry Cp1 T z capacitor 22pF Cth capacitor 220pF Cthp capacitor 10pF show Gad Lt aft DO1608P 222 inductor 2 2uH 2 3A pk Mark Unom Pins R1 si resistor 20K Mark Text Anchors R2 resistor B0 6K x resistor 324K Bil of Materials R6 resistor 10K Rth u a ss resistor 20K Efficency Report Ut Linear Technology L1 gt integrated circuit SPICE Netist SPICE Error Log ES vile Traces tt CI Autorange Y 4005 M Set Probe Reference Status Ear oper and reliable operation i su F Ioobar may significantly affect TL dl Window Tabs bee This circuit is distributed of this creuit at the bottom of the schematic 2008 Linear Technology y TAR TECHNOLOGY Computing Efficiency of SMPS Circuits Left click on Simulate menu Left click on Edit Simulation Left click on Stop simulating if steady state
10. Linear www linear com for email news and updates Ot lechnology LIspice SwitcherC AD Ill L1C3411 asc Ele Edit Hierarchy View Simulate Tools Window a El FP HF A R 988 Cony bitmap to Cipboard HEM OG LL 43 fa Write to a wmf fie 2008 Linear Technology y LINTAR TECHNOLOGY Built in Helo System Left Click on Help menu and then Help Topics Bl schematic colors The menu command Tools gt Color Preferences colors allows you to set the colors used in displaying the schematics You click on an object in the sample schematic and use the red green and blue sliders to adjust the colors to your preferences REDEGIT TIE DW E HI gt a Frere trates ee GG s PEA dl Senne Mote Mon electrical graphical annotations made to schematics such as lines and circles will be draw in the pas color A n6nomponenf hod linsar corn softwars scacs ocl 2008 Linear Technology y LINTAR TECHNOLOGY Emailing Comments and Signing up for Linear Insider F j Linear Technology LI spicefSwitcherCAD 111 1501 File View Tools Help BB pon Help Topics e About LT spicefswitcherlal Ill About LT spicefswitcherCAD 111 x F1 SO M LS 7 Version 2 11 Aug 10 004 10 08 11 Click here to e mail comments and bug reports to scad3 linear com Click here to visit Linear s website www linear cam Cli
11. cations team 2008 Linear Technology L TECHNOLOGY Start with a New Schematic New Schematic l iLinear Techn gy SwitcherCAD III cs 124 250mA 137Z asc pls uisi al Left click on the New Schematic symbol in the Schematic Editor Toolbar 2008 Linear Technology y CAR TECHNOLOGY Add a Macromodel amp Opening Test Fixture Add Component F jlinear Technology SwitcherCAD 5 12 250mA 1372 asc 1 10 A Window Simulate Edit 18 x Bla ul F 410 mjejal SIS ole 13 0 Mole J a IN SW 4 7 pP Select Component Symbol Left click on the Component symbol in the Schematic Editor Toolbar Enter root part to search for the model e g 3411 Left click on Open this macromodel s Dm nm LT 34106 LTES406B E LTC3410B 1 2 LTC340 LTC3410B 1 875 LTC3407 2 LTC3411 To run a test fixture jump to the un ana dns Probe Circuit in Lispice section an 2008 Linear Technology LL LINTAR Getting Started using SwitcherCAD III LTspice Use one of the 100s of demo circuits available on linear com e Reviewed by Linear Technology s Factory Applications Group Use a pre drafted test fixture JIG e Provides a good starting point Use the schematic editor to create your own design e LIspice contains macromodels for most LTC power devices 2008 Linear Techno
12. ck here to join the Linear Insider e mail list n Copyright 1990 1999 2000 2001 2002 2003 2004 Linear Technology Corporation All rights reserved Display version num 7 Author Mike Engelhardt 2008 Linear Technology 4 LINEAR TECHNOLOGY Customer Support Linear Technology customers can obtain support by e Calling your local field applications engineer http www linear com contact Calling 1 408 432 1900 for factory application support e Additional support not related to Linear Technology circuits or models support e Built in help topics amp User Manual Independent LTspice users group search messages 2008 Linear Technology L TECHNOLOGY Independent LT spice Users Group The group has a section of files and messages with additional tutorials libraries and examples http groups yahoo com group L T spice Join LTspice Users Group Email LTspice subscribe yahoogroups com 2008 Linear Technology Subject Subscribe La Venere 11621 leteg la Sen ted tee 050 090 ly Yahoo Groups Tips pow t tron of pew wows te 9 nid ere o Home Activity within Says 103 yea Note 169 Seen Vos Desr iptron Dedicated to the ex change of informatica about Tspsce LT spice ntcherCAD 111 download no ls corepiete and fully functional SPICE am that is available free o
13. e for your design Hold Ctrl key and right click Ctrl right click over the LT macromodel s symbol Left click on Go to Linear website for datasheet on the dialog box that appears You can also open the macromodel s test fixture as a draft starting point Lispice SwitcherCabD Ill 1 254 4MHz Synchronous Step down D Converter Open this macromodel s test Fiebre 5 Go En Linear website for datasheet Cancel 2008 Linear Technology 4 LINEAR TECHNOLOGY Adding Circuit Elements Diode Rotate Place Inductor Mirror Place Capacitor Place Resistor near Technology SwitcherCAD III 5 12V 250mA 1372 asc Y Ele Window Simulate Edt Help 4101 Salal Elia Bas 5 47 Left click on the desired component in the Schematic Editor Toolbar Left click on Rotate or Mirror to adjust orientation Alternate you can also use Ctrl R and Ctrl M key shortcuts Move the mouse to the position you want to place it Left click to place it LI WIR 2008 Linear Technology 218 x SS 2 2 13 5 o lolo OUT Left click on the Component symbol in the Schematic Editor Toolbar Search directory structure for desired circuit element e g load and voltage Left click on OK Move the mouse to the position you Top Directos CAPROGRATALTCXSWCADIIIbAsgm amm 1 CAPROGRAWI LTCAS WADIA
14. esizing shrink your box before you let go of the left mouse click or use the Undo command in the Edit menu inear Technology LTspice SwitcherCAD Ill LTC3411 raw PES File View PlotSettings Simulation Tools Window Help 0 X 424 Ed BRE Bom 4684 To view SMPS voltage ripple you will need to zoom into a narrow section since waveform Is initially compressed to full range x 1 01843us 981 9KHz dy 1 9mV ji SP 2008 Linear Technology y LINEAR TECHNOLOGY Average RMS Current or Voltage Calculations Hold down Ctrl and left click on the or V trace label in the waveform viewer 2 4 j amp xi DEM inter al Star 0 3 A Interval End 48 2607 0 647 Average B49 59mA 0 3A cm M Fug 1 45834 0 34 0 64 O A lus 2015 40s 60115 0015 to edt expression ControtLeft to integrate ee Instantaneous amp Average Power Dissipation Instantaneous Power Dissipation Hold down the ALT key and left click on the symbol of the component e Pointer will change to a thermometer Plotted in units of Watts Average Power Dissipation Hold down the Ctrl key and left click on the trace label power dissipation waveform Bus 125 Bill of Materials BOM Left click on View menu Left click on Bill of Materials Fij Linear Technology LT spice SwitcherCAD III LTC341
15. f charge from Linear Techeclog Betore enng the software please read the License Agreement found the iatrodoctory LT spice Help pages Please report bags directly to LTC The program includes the correct address for that om its Help Aboot balog box Mesa commmand Help About Tepece SmischerCAD 111 You will need to include any relevant fles and a note on bow to deplicate the problem Tor gener al question plecse reod rhe program Help file the group VO and try the group message Search before posting If you post questions about a arcuit t is most helpfel to also upload the schematic fle asc and any necessary symbol and model fles to the Terz folder Never upload the big cutpat fle raw of a simulation Yahoo Groups allow you to easily correct or delete any upload mistake A lst of all uploaded files can be found ia Fies Files Inden It is members caly to help avoed spammers Please avoed personal attacks The Group Moderators have no affliatica with Linear Technolog Mow Recent Messages lt Seaca for oer groups LI WIR
16. ing Started using SwitcherCAD uL spice Use a pre drafted test fixture JIG e Provides a good starting point Use the schematic editor to create your own design LTspice contains macromodels for most LTC power devices 2008 Linear Technology CAR OGY Demo Circuits on linear com Go to http www linear com Enter root part number in the search box e g 3411 Select Simulate Tab Follow the instructions provided If you do not find a demo circuit of interest use a pre drafted test fixture covered next Download LTspice lt gt Download Demo Circuit 2008 Linear Technology PXMM BFE Qu PRODUCTS SOLUTIONS DESIGN SUPPORT PURCHASE COMPANY Home gt Product Categories gt Power Management gt Switching Regulators gt Step Down Buck Regulators gt internal Power Switch gt LTC3411 LTC3411 1 25A 4MHz Synchronous Step Down DC DC Converter FEATURES DESCRIPTION PACKAGING APPLICATIONS SIMULATE SIMULATE LTSpice Sw cherCAD ll is a powerful FREE circut simulator and schematic capture program providing macro models for 80 of Linear Technology s switching regulators over 200 op amp models as well as resistors transistors and MOSFET models Step 1 If you do not already have a copy of LTSpice click here to download and instal LTSpice Sw amp cherCAD Step 2 Once LTSpice is installed click here for a ready to run demonstration circut of
17. logy L TECHNOLOGY Start with a New Schematic New Schematic ae ar Techn ogy SwitcherCAD 5 12V 250mA 1372 asc an wd NUES Est Hep Left click on the New Schematic symbol in the Schematic Editor Toolbar 2008 Linear Technology y CAR TECHNOLOGY Add a Linear Technology Macromodel Add Component l jLinear Technology SwitcherCAD III 5V 12V 250mA 1372 asc X Ele View Window Simulate Edt Help ale ul 12 aalala Elia Left click on the Component symbol in the Schematic Editor Toolbar Enter root part to search for the model e g 3411 Left click on OK Linear Technology LTspice Switc a EX E Select Component Symbol 17 X Ele Edit Hierarchy View Simulate Tools Window m 1 254 4MHz Synchronous Step down DC DC Converter A po 979682 Open this macromodel s test fixture LTC3411 CAPROGRA 1NLTCNSwCADIIIMIbSsymNPowerProducts LTC3404 LTC3406B 1 2 LTC3410 1 65 LTC3405 LTC3406B 1 5 LTC3410 1 875 LTC34054 LTC3406B 1 8 LTC3410B LTC34054 1 375 LTC3406B 2 LTC3410B 1 2 LTC34054 1 5 LTC3407 LTC34054 1 8 LTC3407 2 LTC3406 LTC3407 4 LTC3406 1 2 LTC3408 LTC3406 1 5 LTC3409 LTC3406 1 8 LTC3410 LTC3406B LTC3410 1 2 a 2008 Linear Technology LI WIR Getting the Latest Datasheet Use the macromodel s shortcuts to download the Datasheet as a referenc
18. req Td Theta Pro 2 Td Taul Td2 Ta Small sonal AC anahi AC SFFMiloll lame Fear MDI Fang AC Amplitude O PwLM il ue AC Phase C2 TABLE vi v2 Make this inicmation visible on schermati 7 mar 1214 r Parache Properties Toole 07m This is an active lod T 100n Make thn information visible on schematic Tarde 01m Tpenodis 02m Ncycler 1 Make thes inficemehon visible on schematic Tdelay needs to be adequate so that the device is in steady state and out of startup before the load step occurs Simulating a Transformer Draw each winding of the transformer as an individual inductor Couple inductors with a mutual inductance statement Add a SPICE directive of the form K1 L1 L2 L3 1 to the schematic Left Click on Edit then SPICE Directive e Inductors in a mutual inductance will be drawn with a phasing dot Start initially with a mutual coupling coefficient equal to 1 K statement coupling Transformer with two winding the windings K1 L1 en I Cai 100u 900u 1 3 turns ration gives Note winding inductance ratio is a 1 9 inductance ratio the square of the turns ratio 2008 Linear Technology L TECHNOLOGY Reminder to Periodically Sync Release Update your release of LTspice to get the latest Software updates e Models and examples Sign up for Linear Insider via My
19. the LTC3411 Step 3 If LTspice Sw cherCAD E does not automatically open after Clicking the above Ink you can instead run the simulation by right clicking on the link and selecting Save Target As After saving the file to your computer start LTSpice and open the demonstartion circuit by selecting Open from the File menu AD TECHNOLOGY Demo Circuit Y Designed and Reviewed by Factory Apps Group F 4 Linear Technology LTspice SwitcherCAD IN LTC3411 asc 4 Eile Edit Hierarchy View Simulate Tools Window Help To run a demo circuit jump to the Run and Probe a Circuit in LT spice section Contact your local sales raprasantativs for assistance This circuit Is distributed to customers only Tar usa with LTO parts 2 2 o Copyright 2008 Linsar Technology Ing All rights reseed 2008 Linear Technology y LINEAR TECHNOLOGY Getting Started using SwitcherCAD III LTspice Use one of the 100s of demo circuits available on linear com e Reviewed by Linear Technology s Factory Applications Group Use a pre drafted test fixture JIG e Provides a good starting point Use the schematic editor to create your own design LTspice contains macromodels for most LTC power devices 2008 Linear Technology L TECHNOLOGY Pre Drafted Test Fixture JIG Used for testing models during development Provides a draft starting point Not reviewed by Linear Technology s factory appli
20. und Draw Wire ar Technology SwitcherCAD 5V 12V 250mA a er a JE Help Bla al T 15 sal IN AAA AAA A MA A AN laj x maja Ale _ 2 amp 3 Zol ojolo Drag Undo Redo Delete Rotate Duplicate Mirror Paste b t Schematics Place Comment Find Place SPICE directive 2008 Linear Technology LL LINTAR Simulation Commands To run a simulation specify the type of analysis to be performed There are six different types of analyses Transient analysis omall signal AC Noise DC transfer function DC operating point Simulation commands are placed on the schematic as text Called dot commands 2008 Linear Technology L TECHNOLOGY Editing Simulation Commands Left click on Simulation menu Left click on Edit Simulation Cmd Asastarting point in a simulation Left click on Transient tab Enter a Stop Time You may need to adjust this again later Select OK 2008 Linear Technology Edit Simulation Command Perform a non linear time domain simulation Stop Time Time to Start Saving Data 1 aximum Timestep Start external DE supply voltages at 0 Stop simulating if steady state is detected Don t reset when steady state is detected Step the load current source __ Skip Initial operating point solution Syntax tran lt lt option lt option
21. y Linear le hnology sph AD M il ET EE I T i Smudate Tools Window AW Rem AS N Fa p T u Efficiency Report Cen 1 oorr Input 1 28 33V gt Output 997 mW 999mV Ri Ipeak up Dissipation OmA Omw 0mW DE Use a Pulsed Function as a Transient Response Load Insert a current source load Left click on the Component symbol in the Schematic Editor Toolbar Select load or load2 circuit element and configure as pulsed Left click on OK Configure load as a pulsed function covered next Steps current from initial to pulsed value and back Run and review results epe c TITTEN reper _ Bear aaa PAY threw LTC L ne DH Meer jas jean pde dh T Lu AQAR E BAN ime 49243 m leon je EN dap ICT I NU OS ME Eine dnd 6 LINTAR TECHNOLOGY as 2008 Linear Technology 4 y Configuring Load as a Pulse Function Right click on the load or load2 Select Pulse J Ee Modify the Attributes 11 Initial value 12 Pulsed Value e delay Delay e Ir Rise time Tf Fall time On time period Period Ncycles Number of cycles Omit for free running 2008 Linear Technology 4 LINEAR TECHNOLOGY PULSEIT 12 Tdelay Trice Tial Ton Period Hoycken SINE lolhzet Lamp F
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