Version 4 SHEET 1 5012 2548 WIRE -64 -480 -96 -480 WIRE 128 -480 -64 -480 WIRE 288 -480 128 -480 WIRE 448 -480 288 -480 WIRE -96 -448 -96 -480 WIRE 288 -432 288 -480 WIRE 128 -384 128 -480 WIRE 144 -384 128 -384 WIRE 448 -384 448 -480 WIRE 448 -384 432 -384 WIRE -96 -352 -96 -368 WIRE -352 -288 -400 -288 WIRE -256 -288 -352 -288 WIRE -48 -288 -256 -288 WIRE 144 -288 -48 -288 WIRE 496 -288 432 -288 WIRE 624 -288 576 -288 WIRE 864 -288 624 -288 WIRE 976 -288 864 -288 WIRE 1024 -288 976 -288 WIRE 624 -256 624 -288 WIRE 1024 -256 1024 -288 WIRE -400 -240 -400 -288 WIRE -256 -240 -256 -288 WIRE -48 -240 -48 -288 WIRE 864 -240 864 -288 WIRE 144 -192 48 -192 WIRE 512 -192 432 -192 WIRE -256 -128 -256 -176 WIRE -192 -128 -256 -128 WIRE -48 -128 -48 -160 WIRE -48 -128 -112 -128 WIRE 48 -128 48 -192 WIRE 48 -128 -48 -128 WIRE 512 -128 512 -192 WIRE 624 -128 624 -192 WIRE 624 -128 512 -128 WIRE 704 -128 624 -128 WIRE 864 -128 864 -176 WIRE 864 -128 784 -128 WIRE 864 -112 864 -128 WIRE 1024 -112 1024 -176 WIRE -400 -96 -400 -160 WIRE -256 -96 -256 -128 WIRE 144 -96 128 -96 WIRE 448 -96 432 -96 WIRE -144 0 -192 0 WIRE -32 0 -144 0 WIRE 144 0 -32 0 WIRE 496 0 432 0 WIRE 624 0 576 0 WIRE 864 0 624 0 WIRE 960 0 864 0 WIRE 1024 0 960 0 WIRE 624 32 624 0 WIRE 1024 32 1024 0 WIRE -192 48 -192 0 WIRE -32 48 -32 0 WIRE 864 48 864 0 WIRE 144 96 128 96 WIRE 512 96 432 96 WIRE -192 160 -192 128 WIRE -32 160 -32 112 WIRE 512 160 512 96 WIRE 624 160 624 96 WIRE 624 160 512 160 WIRE 704 160 624 160 WIRE 864 160 864 112 WIRE 864 160 784 160 WIRE 864 176 864 160 WIRE 1024 176 1024 112 WIRE -368 192 -416 192 WIRE -256 192 -368 192 WIRE -48 192 -256 192 WIRE 144 192 -48 192 WIRE 448 192 432 192 WIRE -416 240 -416 192 WIRE -256 240 -256 192 WIRE -48 240 -48 192 WIRE 144 288 48 288 WIRE 480 288 432 288 WIRE 608 288 560 288 WIRE 848 288 608 288 WIRE 960 288 848 288 WIRE 1008 288 960 288 WIRE 608 320 608 288 WIRE 1008 320 1008 288 WIRE -256 336 -256 304 WIRE -192 336 -256 336 WIRE -48 336 -48 320 WIRE -48 336 -112 336 WIRE 48 336 48 288 WIRE 48 336 -48 336 WIRE 848 336 848 288 WIRE -416 384 -416 320 WIRE -256 384 -256 336 WIRE 144 384 128 384 WIRE 496 384 432 384 WIRE 496 448 496 384 WIRE 608 448 608 384 WIRE 608 448 496 448 WIRE 688 448 608 448 WIRE 848 448 848 400 WIRE 848 448 768 448 WIRE 848 464 848 448 WIRE 1008 464 1008 400 WIRE 144 480 128 480 WIRE 448 480 432 480 WIRE 144 576 128 576 WIRE 480 576 432 576 WIRE 608 576 560 576 WIRE 848 576 608 576 WIRE 960 576 848 576 WIRE 1008 576 960 576 WIRE 608 608 608 576 WIRE 1008 608 1008 576 WIRE 848 624 848 576 WIRE 144 672 128 672 WIRE 496 672 432 672 WIRE 496 736 496 672 WIRE 608 736 608 672 WIRE 608 736 496 736 WIRE 688 736 608 736 WIRE 848 736 848 688 WIRE 848 736 768 736 WIRE 848 752 848 736 WIRE 1008 752 1008 688 WIRE 144 768 128 768 WIRE 464 768 432 768 WIRE 464 832 464 768 WIRE 512 832 464 832 WIRE 544 832 512 832 WIRE 656 832 624 832 WIRE 144 864 128 864 WIRE 144 960 128 960 WIRE 144 1056 128 1056 WIRE 144 1152 128 1152 WIRE 288 1232 288 1216 FLAG -96 -352 0 FLAG -64 -480 vIN FLAG -400 -96 0 FLAG 864 -112 0 FLAG 128 -96 vIN FLAG 1024 176 0 FLAG 864 176 0 FLAG 448 -96 vIN FLAG 1008 464 0 FLAG 848 464 0 FLAG 448 192 vIN FLAG 1008 752 0 FLAG 848 752 0 FLAG 448 480 vIN FLAG -256 -96 0 FLAG -416 384 0 FLAG -256 384 0 FLAG 128 96 vIN FLAG -192 160 0 FLAG -32 160 0 FLAG 960 0 vBUCK2 FLAG 976 -288 vBUCK1 FLAG 656 832 vIN FLAG -352 -288 L1_OUT FLAG -144 0 L3_OUT FLAG -368 192 L2_OUT FLAG 960 288 vBUCK3 FLAG 960 576 vBUCK4 FLAG 128 672 vBUCK2 FLAG 128 768 vBUCK3 FLAG 128 864 vBUCK4 FLAG 128 960 L1_OUT FLAG 128 1056 L2_OUT FLAG 512 832 PG FLAG 128 480 vIN FLAG 128 384 vIN FLAG 1024 -112 0 FLAG 128 576 vBUCK1 FLAG 288 1232 0 FLAG 128 1152 vIN SYMBOL res -64 -256 R0 SYMATTR InstName R21 SYMATTR Value 649k SYMBOL res -96 -112 M270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R22 SYMATTR Value 1Meg SYMBOL res 688 -144 M90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R25 SYMATTR Value 1Meg SYMBOL ind 464 592 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L4 SYMATTR Value 1.5µ SYMBOL res 688 144 M90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R4 SYMATTR Value 1Meg SYMBOL ind 480 -272 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L1 SYMATTR Value 0.82µ SYMBOL res 672 432 M90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R6 SYMATTR Value 412k SYMBOL ind 480 16 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L2 SYMATTR Value 0.82µ SYMBOL res 672 720 M90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R8 SYMATTR Value 665k SYMBOL ind 464 304 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L3 SYMATTR Value 1.5µ SYMBOL voltage -96 -464 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V1 SYMATTR Value 5 SYMBOL res 1008 16 R0 SYMATTR InstName RLOAD2 SYMATTR Value 5k SYMBOL res 992 304 R0 SYMATTR InstName RLOAD3 SYMATTR Value 5 SYMBOL res 992 592 R0 SYMATTR InstName RLOAD4 SYMATTR Value 5 SYMBOL cap 848 -240 R0 SYMATTR InstName C1 SYMATTR Value 47µ SYMATTR SpiceLine Rser=1m SYMBOL cap 848 48 R0 SYMATTR InstName C2 SYMATTR Value 47µ SYMATTR SpiceLine Rser=1m SYMBOL cap 832 336 R0 SYMATTR InstName C3 SYMATTR Value 47µ SYMATTR SpiceLine Rser=1m SYMBOL cap 832 624 R0 SYMATTR InstName C4 SYMATTR Value 47µ SYMATTR SpiceLine Rser=1m SYMBOL cap -272 -240 R0 SYMATTR InstName C5 SYMATTR Value 1µ SYMBOL res -64 224 R0 SYMATTR InstName R2 SYMATTR Value 102K SYMBOL cap -272 240 R0 SYMATTR InstName C6 SYMATTR Value 1µ SYMBOL res -96 352 M270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R11 SYMATTR Value 1Meg SYMBOL res -432 224 R0 SYMATTR InstName R12 SYMATTR Value 5 SYMBOL cap -48 48 R0 SYMATTR InstName C7 SYMATTR Value 1µ SYMBOL res -208 32 R0 SYMATTR InstName R13 SYMATTR Value 15 SYMBOL res 1008 -272 R0 SYMATTR InstName RLOAD1 SYMATTR Value 5k SYMBOL res -416 -256 R0 SYMATTR InstName R15 SYMATTR Value 5 SYMBOL res 528 848 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R16 SYMATTR Value 100k SYMBOL cap 608 -256 R0 WINDOW 123 26 77 Left 2 SYMATTR Value2 Rpar=649k SYMATTR InstName C8 SYMATTR Value 10p SYMBOL LT3380 288 288 R0 WINDOW 39 1632 164 Center 0 WINDOW 40 1526 183 Center 0 WINDOW 123 1489 144 Center 0 SYMATTR InstName U1 SYMBOL cap 608 32 R0 WINDOW 123 24 76 Left 2 SYMATTR Value2 Rpar=1.07Meg SYMATTR InstName C9 SYMATTR Value 10p SYMBOL cap 592 320 R0 WINDOW 123 24 77 Left 2 SYMATTR Value2 Rpar=1Meg SYMATTR InstName C10 SYMATTR Value 10p SYMBOL cap 592 608 R0 WINDOW 123 24 77 Left 2 SYMATTR Value2 Rpar=1Meg SYMATTR InstName C11 SYMATTR Value 10p TEXT 184 1264 Left 2 !.tran 10m startup TEXT 1400 -584 Left 2 ;Mode of Operation\n \n Mode_x - 0 - Pulse-Skipping Mode\n 1 - Burst Mode Operation\n 2 - Forced Continuous Mode\n \n *The switching converters operate in PSKIP mode during SoftStart (SS)\n and mode transition happens after SS and Time delay, Td:\n For Bucks 1&2:\n > 2.7Vin: Td=500us\n > 5.5Vin: Td=3.2ms\n For Bucks 3&4:\n > 3.3Vin: Td=1.6ms\n > 5.5Vin: Td=3.6ms\n \nSwitching Frequency\n \n FSW_x - 0 Switching Frequency 2.25MHz\n 1 - Switching Frequency 1.125MHz\n \nPhase\n \n PH_x - 0 - Clock Phase 1\n 1 - Clock Phase 2\n \n \nVoltage Feedback Programming \n \n with 12.5mV LSB Step Size (Use Dec Fomart)\n E.g. 11111 (Bin) = 31 (Dec)\n \n Decimal Input = FB Reference\n 0 = 412.5mV\n 25 = 725mV\n 31 = 800mV TEXT 2440 -560 Left 2 ;*Bx - Buckx\n*Lx - LDOx\n \nSoftware Enable\n \n sEn_Bx/Lx - 0 - Disabled if EN Pin Is Low\n 1 - Enabled\n \nKeep Alive\n \n KA_Bx/Lx - 0 - Do Not Keep Enabled in Device Standby\n 1 - Keep Enabled in Device Standby\n \nEnable Output Offset\n \n EOO_Bx/Lx - 0 - Enable at Any Output Voltage\n 1 - Enable Only if Output Voltage Is <300mV\n \nTurn Off Delay / Sequence Down Control\n \n tOff_Bx/Lx - 0 - Disable Regulator at Falling PWR_ON\n 1 - Disable Regulator at Falling PWR_ON + 100ms\n 2 - Disable Regulator at Falling PWR_ON + 200ms\n 3 - Disable Regulator at Falling PWR_ON + 300ms TEXT 1400 -664 Left 4 ;Configurable Parameters