* SPICE netlist
QT3 rama1 rama1 P001 0 2N3906
QT4 N003 rama1 P002 0 2N3906
QT1 rama1 Vref N004 0 2N3904
QT2 N003 Vf N004 0 2N3904
QBD136 N001 N002 VIN 0 T2_pas
R1_lazo Vo Vf 2.5k
R2_lazo Vf 0 2.5k
Vref Vref 0 2.5
VIN VIN 0 9.5
R2 VIN P001 2.2k
R3 VIN P002 2.2k
R1_fb N001 vb7 1k
R2_fb vb7 0 2.32k
R_S Vo N001 1.97
QT5_fb N003 vb7 Vo 0 2N3904
QBD135 N002 N003 N001 0 T1_paso
I1 NC_01 NC_02 1
RL Vo 0 3.333
QT1_c N004 N005 N007 0 2N3904
QT2_c N005 N005 N006 0 2N3904
QT3_c N007 N006 0 0 2N3904
QT4_c N006 N006 0 0 2N3904
R_ref_c Vref N005 5k

* LTspice schematic (.asc)
Version 4
SHEET 1 1728 1328
WIRE -528 -408 -864 -408
WIRE -304 -408 -528 -408
WIRE 16 -408 -304 -408
WIRE 160 -408 112 -408
WIRE 272 -408 160 -408
WIRE 400 -408 272 -408
WIRE 512 -408 480 -408
WIRE 608 -408 512 -408
WIRE 736 -408 608 -408
WIRE 864 -408 736 -408
WIRE 272 -360 272 -408
WIRE -416 -280 -464 -280
WIRE -368 -280 -416 -280
WIRE 64 -248 64 -344
WIRE 160 -248 160 -408
WIRE 272 -248 272 -280
WIRE 400 -248 272 -248
WIRE 432 -248 400 -248
WIRE 608 -248 608 -408
WIRE 272 -232 272 -248
WIRE 432 -216 432 -248
WIRE -864 -200 -864 -408
WIRE -528 -200 -528 -232
WIRE -416 -200 -416 -280
WIRE -416 -200 -528 -200
WIRE -304 -168 -304 -232
WIRE 112 -168 112 -184
WIRE 112 -168 -304 -168
WIRE 512 -168 512 -408
WIRE -528 -152 -528 -200
WIRE 512 -152 512 -168
WIRE 512 -152 480 -152
WIRE 864 -152 864 -408
WIRE 272 -136 272 -152
WIRE -528 -120 -528 -152
WIRE -304 -120 -304 -168
WIRE 112 -88 112 -168
WIRE 384 -88 384 -152
WIRE 384 -88 112 -88
WIRE -704 -72 -768 -72
WIRE -656 -72 -704 -72
WIRE -592 -72 -656 -72
WIRE -240 -72 -256 -72
WIRE 496 -72 -240 -72
WIRE 608 -72 608 -168
WIRE 608 -72 496 -72
WIRE -768 -40 -768 -72
WIRE 608 -40 608 -72
WIRE -528 8 -528 -24
WIRE -416 8 -528 8
WIRE -304 8 -304 -24
WIRE -304 8 -416 8
WIRE -704 88 -704 -72
WIRE -864 152 -864 -120
WIRE -768 152 -768 40
WIRE 608 152 608 40
WIRE 864 152 864 -72
WIRE -704 200 -704 168
WIRE -608 200 -704 200
WIRE -704 264 -704 200
WIRE -416 264 -416 8
WIRE -608 312 -608 200
WIRE -608 312 -640 312
WIRE -480 312 -608 312
WIRE -704 440 -704 360
WIRE -608 440 -704 440
WIRE -704 504 -704 440
WIRE -416 504 -416 360
WIRE -608 552 -608 440
WIRE -608 552 -640 552
WIRE -480 552 -608 552
WIRE -704 664 -704 600
WIRE -416 664 -416 600
FLAG 736 -408 Vo
FLAG -656 -72 Vref
FLAG -864 -408 VIN
FLAG 496 -72 Vf
FLAG 272 -136 0
FLAG -528 -152 rama1
FLAG 400 -248 vb7
FLAG 512 -168 ve7
FLAG -864 152 0
FLAG 608 152 0
FLAG 864 152 0
FLAG -768 152 0
FLAG -704 664 0
FLAG -416 664 0
DATAFLAG 1200 -32 ""
DATAFLAG 624 304 ""
DATAFLAG 208 384 ""
DATAFLAG 896 -32 ""
SYMBOL pnp -464 -232 R180
SYMATTR InstName T3
SYMATTR Value 2N3906
SYMBOL pnp -368 -232 M180
SYMATTR InstName T4
SYMATTR Value 2N3906
SYMBOL npn -592 -120 R0
SYMATTR InstName T1
SYMATTR Value 2N3904
SYMBOL npn -240 -120 M0
SYMATTR InstName T2
SYMATTR Value 2N3904
SYMBOL pnp 112 -344 M270
SYMATTR InstName BD136
SYMATTR Value T2_pas
SYMBOL res 592 -264 R0
SYMATTR InstName R1_lazo
SYMATTR Value 2.5k
SYMBOL res 592 -56 R0
SYMATTR InstName R2_lazo
SYMATTR Value 2.5k
SYMBOL voltage -768 -56 R0
SYMATTR Value 2.5
SYMATTR InstName Vref
SYMBOL voltage -864 -216 R0
SYMATTR Value 9.5
SYMATTR InstName VIN
SYMBOL res -544 -424 R0
SYMATTR InstName R2
SYMATTR Value 2.2k
SYMBOL res -320 -424 R0
SYMATTR InstName R3
SYMATTR Value 2.2k
SYMBOL res 256 -376 R0
SYMATTR InstName R1_fb
SYMATTR Value 1k
SYMBOL res 256 -248 R0
SYMATTR InstName R2_fb
SYMATTR Value 2.32k
SYMBOL res 496 -424 R90
SYMATTR InstName R_S
SYMATTR Value 1.97
SYMBOL npn 384 -216 M90
SYMATTR InstName T5_fb
SYMATTR Value 2N3904
SYMBOL npn 64 -184 R270
SYMATTR InstName BD135
SYMATTR Value T1_paso
SYMBOL current 784 -664 R0
SYMATTR Value 1
SYMATTR InstName I1
SYMBOL res 848 -168 R0
SYMATTR InstName RL
SYMATTR Value 3.333
SYMBOL npn -480 264 R0
SYMATTR InstName T1_c
SYMATTR Value 2N3904
SYMBOL npn -640 264 M0
SYMATTR InstName T2_c
SYMATTR Value 2N3904
SYMBOL npn -480 504 R0
SYMATTR InstName T3_c
SYMATTR Value 2N3904
SYMBOL npn -640 504 M0
SYMATTR InstName T4_c
SYMATTR Value 2N3904
SYMBOL res -720 72 R0
SYMATTR InstName R_ref_c
SYMATTR Value 5k