Version 4 SHEET 1 928 680 WIRE 0 304 48 304 WIRE 48 256 0 256 WIRE 304 304 336 304 WIRE 336 304 336 336 WIRE 304 160 336 160 WIRE 336 160 336 -64 WIRE 336 -64 240 -64 WIRE 240 -64 240 -48 WIRE 240 32 240 48 WIRE 48 160 -64 160 WIRE 48 208 -112 208 WIRE -112 208 -112 368 WIRE -112 368 -144 368 WIRE -144 160 -288 160 WIRE -288 160 -288 192 WIRE -288 272 -288 288 WIRE -288 368 -288 400 WIRE -288 480 -288 512 WIRE -224 368 -288 368 WIRE 304 208 432 208 WIRE 304 256 432 256 WIRE 336 -64 528 -64 WIRE 528 -64 528 80 WIRE 528 -64 688 -64 WIRE 688 -64 688 80 WIRE 528 160 528 208 WIRE 688 160 688 256 WIRE 528 368 528 416 WIRE 688 368 688 416 WIRE 528 208 528 288 WIRE 688 256 688 288 WIRE 432 208 528 208 WIRE 432 256 688 256 WIRE 0 272 0 256 WIRE 0 384 0 416 WIRE 0 496 0 512 WIRE 0 384 0 304 FLAG 336 336 0 FLAG 240 48 0 FLAG -288 288 0 FLAG -288 512 0 FLAG 528 416 0 FLAG 688 416 0 FLAG 432 208 _q FLAG 432 256 q FLAG -288 368 ref FLAG -288 160 in FLAG 0 272 0 FLAG 0 512 0 FLAG 0 384 LE SYMBOL voltage -288 176 R0 WINDOW 3 -38 -95 Left 0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR Value PULSE(1.9 2.1 0 10n 10n 40n 100n) SYMATTR InstName V1 SYMBOL D:\\WUTemp\\MAX961_MAX962\\max961 176 224 R0 SYMATTR InstName U1 SYMBOL voltage 240 -64 R0 SYMATTR InstName V2 SYMATTR Value 5 SYMBOL res -160 176 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 0 56 VBottom 0 SYMATTR InstName R1 SYMATTR Value 50 SYMBOL res -240 384 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 0 56 VBottom 0 SYMATTR InstName R2 SYMATTR Value 50 SYMBOL voltage -288 384 R0 SYMATTR InstName V3 SYMATTR Value 2 SYMBOL res 512 272 R0 SYMATTR InstName R3 SYMATTR Value 1k SYMBOL res 512 64 R0 SYMATTR InstName R4 SYMATTR Value 1k SYMBOL res 672 64 R0 SYMATTR InstName R5 SYMATTR Value 1k SYMBOL res 672 272 R0 SYMATTR InstName R6 SYMATTR Value 1k SYMBOL voltage 0 400 R0 WINDOW 3 52 88 Left 0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR Value PULSE(0 5 240n 10n 10n 130n 1) SYMATTR InstName V4 TEXT -296 -40 Left 0 !.tran 500n TEXT -296 -96 Left 0 !.include max961_962.lib TEXT 40 -144 Left 0 ;I wonder why the subcircuit model has three supply pins: V+, V- and GND\nThat's the reason why I have labeled SHDN as GND too.