Version 4 SHEET 1 3020 1556 WIRE 1472 896 1360 896 WIRE 1600 896 1472 896 WIRE 1984 896 1600 896 WIRE 1600 928 1600 896 WIRE 1600 1024 1600 992 WIRE 1824 1024 1600 1024 WIRE 1600 1056 1600 1024 WIRE 1824 1056 1824 1024 WIRE 1360 1104 1360 896 WIRE 1472 1120 1472 896 WIRE 1984 1136 1984 896 WIRE 1984 1136 1952 1136 WIRE 2160 1200 1952 1200 WIRE 2192 1200 2160 1200 WIRE 2224 1200 2192 1200 WIRE 2336 1200 2304 1200 WIRE 2352 1200 2336 1200 WIRE 2384 1200 2352 1200 WIRE 2480 1200 2448 1200 WIRE 2592 1200 2560 1200 WIRE 2160 1248 2160 1200 WIRE 1968 1264 1952 1264 WIRE 2064 1264 2048 1264 WIRE 2352 1280 2352 1200 WIRE 2064 1312 2064 1264 WIRE 1600 1392 1600 1120 WIRE 1824 1392 1824 1344 WIRE 1824 1392 1600 1392 WIRE 2064 1392 2064 1376 WIRE 2064 1392 1824 1392 WIRE 2160 1392 2160 1328 WIRE 2160 1392 2064 1392 WIRE 2208 1392 2160 1392 WIRE 2352 1392 2352 1344 WIRE 2352 1392 2208 1392 WIRE 2432 1392 2352 1392 WIRE 2592 1392 2592 1200 WIRE 2592 1392 2512 1392 WIRE 2688 1392 2592 1392 WIRE 2768 1392 2688 1392 WIRE 2688 1408 2688 1392 WIRE 1824 1424 1824 1392 WIRE 2592 1424 2592 1392 WIRE 1360 1520 1360 1184 WIRE 1472 1520 1472 1184 WIRE 1824 1520 1824 1488 WIRE 2592 1520 2592 1488 WIRE 2688 1520 2688 1488 FLAG 1360 1520 0 FLAG 1472 1520 0 FLAG 2688 1520 0 FLAG 2592 1520 0 FLAG 2768 1392 OUT FLAG 1360 896 IN FLAG 1824 1520 0 FLAG 2192 1200 fb FLAG 2208 1392 gd FLAG 2336 1200 vr SYMBOL VOLTAGE 1360 1088 R0 SYMATTR InstName V1 SYMATTR Value 15 SYMATTR SpiceLine Rser=0.1 SYMBOL CAP 2048 1312 R0 SYMATTR InstName C1 SYMATTR Value 1µ SYMBOL RES 1952 1280 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 0 56 VBottom 0 SYMATTR InstName R1 SYMATTR Value 470 SYMBOL RES 2144 1232 R0 SYMATTR InstName R2 SYMATTR Value 1.2k SYMBOL RES 2208 1216 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 0 56 VBottom 0 SYMATTR InstName R3 SYMATTR Value 3.6k SYMBOL POWERPRODUCTS\\LT1170 1824 1200 R0 SYMATTR InstName U1 SYMBOL polcap 2576 1424 R0 SYMATTR InstName C2 SYMATTR Value 1000µ SYMATTR SpiceLine Rser=0.05 SYMBOL polcap 1456 1120 R0 SYMATTR InstName C3 SYMATTR Value 220µ SYMATTR SpiceLine Rser=0.05 SYMBOL RES 2672 1392 R0 SYMATTR InstName Rload SYMATTR Value 2 SYMBOL CAP 1584 1056 R0 SYMATTR InstName C4 SYMATTR Value 2.2µ SYMBOL diode 1584 928 R0 SYMATTR InstName D2 SYMATTR Value 1N4148 SYMBOL schottky 1808 1488 M180 WINDOW 0 24 72 Left 0 WINDOW 3 24 0 Left 0 SYMATTR InstName D3 SYMATTR Value MBR735 SYMATTR Description Diode SYMATTR Type diode SYMBOL diode 2448 1184 R90 WINDOW 0 0 32 VBottom 0 WINDOW 3 32 32 VTop 0 SYMATTR InstName D1 SYMATTR Value 1N4148 SYMBOL CAP 2336 1280 R0 SYMATTR InstName C5 SYMATTR Value 220n SYMBOL ind 2416 1408 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 5 56 VBottom 0 SYMATTR InstName L1 SYMATTR Value 50µ SYMBOL res 2464 1216 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 0 56 VBottom 0 SYMATTR InstName R6 SYMATTR Value 10 TEXT 1352 824 Left 0 !.tran 50m startup TEXT 1656 816 Left 0 ;Positive Buck Converter From Datasheet TEXT 2816 1448 Left 0 ;100mA TEXT 2816 1480 Left 0 ;Minimum TEXT 2816 1416 Left 0 ;Iload LINE Normal 2784 1504 2784 1424 LINE Normal 2800 1488 2784 1504 LINE Normal 2784 1504 2800 1488 LINE Normal 2768 1488 2784 1504