5 4 3 2 1 REVISION HISTORY ECO REV __ APPROVED PRODUCTION 2 E1 VIN DESCRIPTION DATE Charlie 9-2-15 VIN J1 VIN CIN1 + 180uF 25V CIN2 OPT 25V J2 GND E2 CIN3 OPT 25V + CIN4 22uF 25V 1210 CIN5 22uF 25V 1210 D CIN6 10uF 25V 1206 GND R2 OPT D5 B6 RUN INTVCC D1 R10 100k ILIM CLKOUT C7 220nF R7 OPT R14 OPT COUT1 330uF 2.5V 7343 20A MAX + COUT4 330uF 2.5V 7343 J4 GND C4 R8 OPT 0 R12 10 R9 10 R15 OPT C E4 VO_SNS+ A2 A4 R17 0 A6 VO_SNS- VOUT C8 OPT E5 R18 OPT C9 OPT TEMPERATURE COMPENSATION NETWORK FOR DCR SENSING ITEMP R25 OPT C13 2 C12 120pF 4.7uF 6.3V RN1 R27 OPT OPT OPT B 1 PGOOD + A3 R32 6.65k 1% A5 R24 6.04k 1% COUT3 100uF 6.3V 1210 EXTVCC LOAD STEP CIRCUIT + COUT5 OPT 7343 + 3 1 SUD50N03-10CP-E3 Q1 C17 1 1uF C16 100uF 6.3V 1210 J5 VOUT E11 CUSTOMER NOTICE 2 VOUT VOUT C15 100uF 6.3V 1210 E13 COUT6 IOUT STEP OPT 7343 2 3 4 5 E10 A C5 220nF COUT2 100uF 6.3V 1210 R5 3.09k 1% C11 2.2nF C14 EXTVCC ITH GND GND GND GND GND GND GND GND GND GND GND R22 OPT VFB R4 619 1% INTVCC CMDSH-3 R19 10k 1% J4 J5 J6 J7 H4 H5 H6 H7 G4 G5 G6 B5 SGND SGND SGND SGND ITEMP R23 124k E9 B1 CLKOUT R20 0 C10 0.1uF 10V DIFFOUT EXTVCC D6 DIFFN MODE/PLLIN C4 C5 B3 B4 E7 ITEMP PGOOD FREQ MODE/PLLIN JP2 B2 LTC7130 TRK/SS PGOOD SW SW SW SW SW SW SW SW SW A7 SNS- U1 B7 C6 CLKOUT C3 R3 C1 INTVCC DIFFP 3 4 SNSA+ SNSD+ PGOOD C7 2 BURST CCM C2 RUN D7 1 P.S. R16 0 MODE/PLLIN B F1 L1 0.25uH C2 0.22uF 25V D1 2.7 R13 1k 1% C E6 R11 3.01k 1% J3 VOUT 1.5V G1 G2 G3 H1 H2 H3 J1 J2 J3 NC2 A1 BOOST EXTVCC R6 OPT C6 4.7uF 6.3V E8 D2 D3 D4 E1 E2 E3 F2 F3 SVIN TK/SS C3 OPT CLKOUT NC1 VIN VIN VIN VIN VIN VIN VIN VIN VIN C1 1uF 25V 2 E3 VOUT DCR=0.37mOHM SW VIN RUN ON OFF 1 3 JP1 744308025 2.2 F4 F5 F6 F7 E4 E5 E6 E7 G7 R1 GND GND GND GND GND GND GND GND 4.5V - 20V D R28 0.010 2512 R29 OPT 2512 R30 10K IOSTEP CLK E12 CONTRACT NO. LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A APPROVALS CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES. HZ VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED Charlie ENG. CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. GND TECHNOLOGY TITLE: SCHEMATIC HIGH EFFICIENCY STEP-DOWN CONVERTER WITH INTEGRATED FETS AND VERY LOW DCR INDUCTOR SIZE N/A THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 4 3 DATE: 2 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 LTC Confidential-For Customer Use Only IC NO. REV LTC7130EY 2 DC2341A SHEET Wednesday, December 02, 2015 1 1 OF 1 A