Version 4 SHEET 1 3876 1516 WIRE 2496 1056 2496 1024 WIRE 2496 1184 2496 1136 WIRE 2592 1024 2496 1024 WIRE 2592 1056 2592 1024 WIRE 2592 1216 2592 1120 WIRE 2672 1024 2592 1024 WIRE 2672 1152 2672 1024 WIRE 2704 1024 2672 1024 WIRE 2704 1152 2672 1152 WIRE 2832 960 2832 928 WIRE 2832 1232 2832 1216 WIRE 3008 928 2832 928 WIRE 3008 944 3008 928 WIRE 3008 1024 2960 1024 WIRE 3008 1024 3008 1008 WIRE 3008 1040 3008 1024 WIRE 3008 1120 3008 1104 WIRE 3072 1024 3008 1024 WIRE 3104 928 3008 928 WIRE 3200 928 3168 928 WIRE 3200 1024 3152 1024 WIRE 3200 1024 3200 928 WIRE 3200 1040 3200 1024 WIRE 3200 1152 2960 1152 WIRE 3200 1152 3200 1120 WIRE 3200 1168 3200 1152 WIRE 3200 1264 3200 1248 WIRE 3312 1024 3200 1024 WIRE 3312 1056 3312 1024 WIRE 3312 1152 3200 1152 WIRE 3312 1152 3312 1120 WIRE 3392 1024 3312 1024 WIRE 3392 1056 3392 1024 WIRE 3392 1184 3392 1120 WIRE 3472 1024 3392 1024 WIRE 3472 1056 3472 1024 WIRE 3472 1184 3472 1136 FLAG 2496 1184 0 FLAG 2832 1232 0 FLAG 3200 1264 0 FLAG 3008 1120 0 FLAG 3392 1184 0 FLAG 3472 1184 0 FLAG 3472 1024 OUT FLAG 2592 1216 0 FLAG 2496 1024 IN SYMBOL VOLTAGE 2496 1040 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V1 SYMATTR Value 12 SYMBOL cap 2992 944 R0 WINDOW 3 32 44 Left 2 SYMATTR Value .1µ SYMATTR InstName C1 SYMBOL ind 3056 1040 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L1 SYMATTR Value 10µ SYMATTR SpiceLine Rser=50m SYMBOL RES 3184 1024 R0 SYMATTR InstName R1 SYMATTR Value 32.4K SYMBOL res 3184 1152 R0 SYMATTR InstName R2 SYMATTR Value 10K SYMBOL schottky 2992 1104 M180 WINDOW 0 41 52 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D1 SYMATTR Value MBRS140 SYMBOL cap 3376 1056 R0 SYMATTR InstName C2 SYMATTR Value 10µ SYMATTR SpiceLine Rser=5m SYMBOL schottky 3168 912 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName D2 SYMATTR Value 1N4148 SYMATTR Description Diode SYMATTR Type diode SYMBOL cap 3296 1056 R0 SYMATTR InstName C3 SYMATTR Value 22p SYMBOL cap 2576 1056 R0 SYMATTR InstName C4 SYMATTR Value 1µ SYMATTR SpiceLine Rser=5m SYMBOL PowerProducts\\LT3493 2832 1088 R0 SYMATTR InstName U1 SYMBOL res 3456 1040 R0 SYMATTR InstName R3 SYMATTR Value 2.7 TEXT 2932 1244 Left 2 !.tran .5m startup TEXT 2424 1280 Left 2 ;Note:\n If the simulation model is not found please update with the "Sync Release" command from the "Tools" menu.\n It remains the customer's responsibility to verify proper and reliable operation in the actual application.\n Component substitution and printed circuit board layout may significantly affect circuit performance or reliability\n Contact your local sales representative for assistance. This circuit is distributed to customers only for use with LTC parts\n Copyright © 2006 Linear Technology Inc. All rights reserved. TEXT 2984 880 Bottom 2 ;LT3493 - 1.2A, 750KHz Step-down Switching Regulator in 2mm X 3mm DFN\nInput: 12V Output: 3.3V @ 1.2A