A B C D E 4 4 2 1 2 C21 0.01uF 1 Dual Output 2 0 FREQSET VIN 23 3 STBYMD BG1 22 4 FCB EXTVCC 21 5 ITH1 INTVCC 20 6 SGND PGND 19 7 3.3VOUT BG2 18 8 ITH2 BOOST2 17 9 VOSENSE2 SW2 15 SENSE2- TG2 14 RUN/SS2 13 11 SENSE2+ C10 1uF C17 0.1uF 7 8 + C4 150uF,6V SP 2 R8 10 C25 1uF E3 Vin D4 MBRM140T3 (Opt.) C12 10uF 35V C13 10uF 35V + C11 33uF,35V Sanyo 2 L2 See Table 4 Q2B FDS6982S 3 5V to 24V E4 Gnd 2 D3 CMDSH-3 5V @ 4A E2 Gnd D1 MBRM140T3 (Opt.) C7 0.1uF + C8 4.7uF 10V 1 E1 Vout1+ 1 VOSENSE1 R3 See Table 1 1 3 BOOST1 24 4 D2 CMDSH-3 2 5 6 C5 0.1uF NC 25 NC 26 SW1 3 Single Output R15 0.008 Q2A FDS6982S E5 Vout2+ + C22 180uF,4V SP R17 10 R18 10 C23 0.1uF 3 TG1 SENSE1- 2 12 JP8 ITH 29 32 C20 1000pF R13 63.4K 1% C19 180pF 0 3 1 JP6 RUN2 1 C14 1000pF C16 100pF R14 20K 1% C18 0.01uF 3 1 2 C15 0.01uF 0 1 R16 1M R11 4.75K 1% SENSE1+ L1 See Table Q1A FDS6982S 7 8 1 JP5 FCB C6 1500pF C9 100pF 1 27 5 6 2 0 3 JP4 STBY 1 R10 8.06K 1% 3 1 JP3 FSET 1 0 31 Q1B FDS6982S FLTCPL 10 1 30 U1 See Table 3 2 3 JP2 FLTCPL 1 R12 1M R7 1M (Opt.) 2 3 JP1 RUN1 1 2 R9 1M C3 1000pF RUN/SS1 NC R6 20K 1% 28 NC R4 1M C1 0.1uF C2 180pF R5 105K 1% 2 JP7 VOSENSE Single Output 3 16 Dual Output 1 R1 10 R2 10 C32 1uF 3.3V @ 5A E6 Gnd 0 E7 2 5V LDO E8 3.3V LDO Jumpers Select Ref. C24 0.01uF Short Pin JP1 1,2 JP2 2,3 JP3 1,2 JP4 1,2 JP5 1,2 JP6 1,2 Table: 1 ASSEMBLY U1 392A-A LTC1628EUH 392A-B LTC3728EUH IHLP-2525CZ-01-2.2uH 392A-C LTC3728LUH IHLP-2525CZ-01-2.2uH L1 CDEP105-4R3MC-88 L2 Jumpers Select R3 0.008 ohm Ref. IHLP-2525CZ-01-2.2uH 0.006 ohm IHLP-2525CZ-01-2.2uH 0.006 ohm CDEP105-4R3MC-88 LINEAR TECHNOLOGY CORPORATION Single Output Dual Output JP7 Short Pin 2,3 Short Pin 1,2 JP8 Short Pin 2,3 Short Pin 1,2 Title Size High Efficiency Dual Regulator Document Number DEMO 392A-A,B,C Date: Wednesday, July 10, 2002 A B C D 1 1630 McCARTHY BLVD. MILPITAS, CA 95035 (408) 432-1900 (408) 434-0507 FAX Rev LTC1628EUH or LTC3728EUH Sheet E 1 of 1