* SPICE netlist
MQ1 N007 N009 0 0 FDS6680A
MQ2 N007 N005 IN IN FDC638P
C1 OUT2 0 47 Rser=50m
R1 OUT2 N011 118K
R2 N011 0 59K
C2 N015 N014 220p
R3 0 N015 15K
MQ3 N006 N008 0 0 FDS6680A
MQ4 N006 N004 IN IN FDC638P
L1 N006 OUT1 2.2 Rpar=1K
R4 OUT1 N010 118K
R5 N010 0 59K
C3 N012 N013 220p
R6 0 N012 15K
V1 IN 0 5
R7 IN N001 10K
R8 N017 0 59K
R9 OUT1 N017 118K
C4 OUT1 0 47 Rser=50m
L2 N007 OUT2 2.2 Rpar=1K
XU1 N006 N013 N010 N002 N003 N016 0 IN N001 N011 N014 N017 N007 IN 0 N009 N018 N005 MP_01 N004 0 N008 0 IN LTC3736-2 ;pnba SW1)Ith1)Vfb1)Iprg1)Iprg2)PLLLPF)SGND)Vin)Pgood)Vfb2)Ith2)Track)SW2)Sense2+)PGND2)BG2)Run/SS)TG2))TG1)SYNC/FCB)BG1)PGND1)Sense1+
Rload2 OUT2 0 50
Rload1 OUT1 0 50
.tran 1.8m startup

* LTspice schematic (.asc)
Version 4
SHEET 1 1440 848
WIRE -208 -424 -336 -424
WIRE -16 -424 -208 -424
WIRE 112 -424 -16 -424
WIRE 304 -424 112 -424
WIRE -336 -408 -336 -424
WIRE 112 -408 112 -424
WIRE -336 -312 -336 -328
WIRE -16 -312 -16 -424
WIRE 112 -312 112 -328
WIRE -112 -264 -144 -264
WIRE 240 -264 208 -264
WIRE -208 -200 -208 -424
WIRE -112 -200 -208 -200
WIRE 304 -200 304 -424
WIRE 304 -200 208 -200
WIRE -144 -184 -160 -184
WIRE 256 -184 240 -184
WIRE -144 -136 -144 -184
WIRE -112 -136 -144 -136
WIRE 240 -136 240 -184
WIRE 240 -136 208 -136
WIRE -576 -88 -704 -88
WIRE -496 -88 -576 -88
WIRE -400 -88 -496 -88
WIRE -352 -88 -400 -88
WIRE -208 -88 -208 -104
WIRE -208 -88 -272 -88
WIRE -144 -88 -208 -88
WIRE 304 -88 304 -104
WIRE 304 -88 240 -88
WIRE 400 -88 304 -88
WIRE 512 -88 480 -88
WIRE 624 -88 512 -88
WIRE 720 -88 624 -88
WIRE -704 -72 -704 -88
WIRE -576 -72 -576 -88
WIRE -144 -72 -144 -88
WIRE -112 -72 -144 -72
WIRE 240 -72 240 -88
WIRE 240 -72 208 -72
WIRE 624 -72 624 -88
WIRE 720 -72 720 -88
WIRE 512 -56 512 -88
WIRE -400 -8 -400 -88
WIRE -112 -8 -160 -8
WIRE 256 -8 208 -8
WIRE -704 24 -704 8
WIRE -576 24 -576 -8
WIRE 624 24 624 -8
WIRE 720 24 720 8
WIRE -496 56 -496 -88
WIRE -208 56 -208 8
WIRE -112 56 -208 56
WIRE 304 56 304 8
WIRE 304 56 208 56
WIRE -208 72 -208 56
WIRE 304 72 304 56
WIRE -400 120 -400 72
WIRE -112 120 -400 120
WIRE 512 120 512 24
WIRE 512 120 208 120
WIRE -400 136 -400 120
WIRE 512 136 512 120
WIRE -288 184 -304 184
WIRE -192 184 -208 184
WIRE -112 184 -128 184
WIRE 224 184 208 184
WIRE 304 184 288 184
WIRE 400 184 384 184
WIRE -400 232 -400 216
WIRE 512 232 512 216
WIRE -112 248 -144 248
WIRE 224 248 208 248
WIRE -496 312 -496 136
WIRE -112 312 -496 312
WIRE 224 312 208 312
WIRE -496 328 -496 312
WIRE 48 376 48 360
WIRE -496 424 -496 408
FLAG 304 72 0
FLAG 624 24 0
FLAG 512 232 0
FLAG 400 184 0
FLAG -208 72 0
FLAG -576 24 0
FLAG -400 232 0
FLAG -304 184 0
FLAG 48 376 0
FLAG -336 -312 0
FLAG -496 424 0
FLAG 720 24 0
FLAG -704 24 0
FLAG -144 248 0
FLAG -336 -424 IN
FLAG -704 -88 OUT1
FLAG 720 -88 OUT2
SYMBOL nmos 256 -88 R0
SYMATTR InstName Q1
SYMATTR Value FDS6680A
SYMBOL pmos 256 -104 M180
SYMATTR InstName Q2
SYMATTR Value FDC638P
SYMBOL cap 608 -72 R0
SYMATTR SpiceLine Rser=50m
SYMATTR Value 47
SYMATTR InstName C1
SYMBOL res 496 -72 R0
SYMATTR InstName R1
SYMATTR Value 118K
SYMBOL res 496 120 R0
SYMATTR InstName R2
SYMATTR Value 59K
SYMBOL cap 288 168 R90
SYMATTR InstName C2
SYMATTR Value 220p
SYMBOL res 400 168 R90
SYMATTR InstName R3
SYMATTR Value 15K
SYMBOL nmos -160 -88 M0
SYMATTR InstName Q3
SYMATTR Value FDS6680A
SYMBOL pmos -160 -104 R180
SYMATTR InstName Q4
SYMATTR Value FDC638P
SYMBOL ind -256 -72 M270
SYMATTR InstName L1
SYMATTR Value 2.2
SYMATTR SpiceLine Rpar=1K
SYMBOL res -416 -24 R0
SYMATTR InstName R4
SYMATTR Value 118K
SYMBOL res -416 120 R0
SYMATTR InstName R5
SYMATTR Value 59K
SYMBOL cap -192 168 M90
SYMATTR InstName C3
SYMATTR Value 220p
SYMBOL res -304 168 M90
SYMATTR InstName R6
SYMATTR Value 15K
SYMBOL voltage -336 -424 R0
SYMATTR InstName V1
SYMATTR Value 5
SYMBOL res 96 -424 R0
SYMATTR InstName R7
SYMATTR Value 10K
SYMBOL res -512 312 R0
SYMATTR InstName R8
SYMATTR Value 59K
SYMBOL res -512 40 R0
SYMATTR InstName R9
SYMATTR Value 118K
SYMBOL cap -592 -72 R0
SYMATTR Value 47
SYMATTR SpiceLine Rser=50m
SYMATTR InstName C4
SYMBOL ind 384 -72 R270
SYMATTR InstName L2
SYMATTR Value 2.2
SYMATTR SpiceLine Rpar=1K
SYMBOL PowerProducts\\LTC3736-2 48 24 R0
SYMATTR InstName U1
SYMBOL res 704 -88 R0
SYMATTR InstName Rload2
SYMATTR Value 50
SYMBOL res -720 -88 R0
SYMATTR InstName Rload1
SYMATTR Value 50