5 4 3 2 1 PVIN PVIN 12V - 57V IVINN E1 RIN1 0.003 1% 2512 E2 D GND R5 51 5% C6 4.7uF 100V 1210 C5 (Opt) 1210 R7 0 Ohm 1206 C7 4.7uF 100V 1210 C8 (Opt) 1210 C9 (Opt) 1210 C10 + C11 + 47µF (Opt) 12.5mm Dia. Thru-Hole 80V D VIN VIN 12V - 57V E3 E18 (Opt) OUT C1 9 PVIN E7 1 R12 0 Ohm VREF 6 4 *C/10 E10 8 7 TP1 33 TP2 34 R13 0 Ohm 0603 E14 GND 200k 5% GND VREF R17 100k 5% E16 GND 12 SNSN ISMON BG2 CLKOUT SW2 SYNC TG2 FB R16 E15 IVINMON R14 0 Ohm INTVCC 32 CCM ISP C29 0.033µF 0402 ISN PWMOUT SS 2 SS PWM CSS1 33nF 35 E17 GND R18 147k 200kHz (Opt) 12.5mm Dia. Thru-Hole 14 TG1 C12 0.1µF 0402 16 SW1 2 18 + C20 + C30 220µF 35V 220µF 35V C13 0.1µF 0402 L1 10µH SER2918H-103KL BG1 0.008 M4 RJK0451DPB 2512 R34 1.37k 0603 R22 0 Ohm D4 (Opt) SMB VOUT 24V 5A C E20 GND C21 1 3 E19 RS2 ISP R19 71.5k 0603 (Opt) M3 RJK0451DPB R20 3.83k D3 (Opt) SMB 27 INTVCC ALL CAPACITORS 0603. ISP RS1 0.004 1% 2010 TG1 SW1 BG1 19 BG2 21 SW2 24 TG2 37 FB SNSP TG2 BG2 FB PWMOUT *C/10 25 VREF 26 SS 31 3 INTVCC PWMOUT PWM *SHORT R21 0 Ohm 0603 CUSTOMER NOTICE LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. CC2 1000pF CC1 0.01µF APPROVALS TECHNOLOGY PCB DES. APP ENG. A LTC CONFIDENTIAL - FOR CUSTOMER USE ONLY TITLE: SCHEMATIC SIZE C:\PADS PROJECTS\2123A(LT3790)\SCH\2123A_REV1.DSN THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 3 1630 McCarthy Blvd. Milpitas, CA 95035 www.linear.com Phone: (408)432-1900 Fax: (408)434-0507 60VIN, 60VOUT FOUR-SWITCH SYNCHRONOUS BUCK-BOOST CONTROLLER ALL RESISTORS 0402 1%. 4 B SW2 TP3 RC1 15k 5% NOTE: UNLESS OTHERWISE SPECIFIED. 28 SNSP TP4 A 5 + C19 VOUT 22 C/10 PGND B TP6 E11 ISMON E12 CLKOUT E13 SYNC SNSP SGND IVINMON C18 (Opt) 1210 PWM SHORT 20 17 PGND C/10 C17 (Opt) 1210 15 M2 RJK0651DPB BG1 30 39 SGND E9 5 *SHORT SW1 VREF TEST1 SHORT C2 0.1µF 0402 VC E8 U1 LT3790EFE 29 R8 (Opt) CTRL C16 (Opt) 1210 D2 BAT46WJ 13 OVLO TG1 C15 4.7µF 50V 1210 D1 BAT46WJ M1 RJK0651DPB R11 27.4k CTRL R10 200k 5% 0603 11 BST2 38 TP5 R6 200k 5% 0603 INTVCC BST1 OVLO INTVCC C4 4.7µF 10V R9 (Opt) RT E6 EN/UVLO 36 R1 499k 0603 R3 56.2k C14 4.7µF 50V 1210 INTVCC VIN E5 C 0402 IVINP GND EN/UVLO C3 1µF 100V 1206 0.47µF 10 E4 R4 499K 0603 IVINN R2 (Opt) 0603 SCALE = NONE 2 IC NO. N/A LT3790EFE DC2123A MODIFY DATE: Nov 24, 2014 REV. 1 SHEET 1 1 OF 2 INTVCC IVINN PWM ISP TG1 M5 (Opt) LFPAK R24 VIN D5 ISP TG2 (Opt) 0603 IVINN M8 (Opt) LFPAK R29 (Opt) 0603 SW1 TG1 SW1 BG1 SW2 SNSP TG2 (Opt) SOD-123 SW2 SW1 D6 ISP SW2 BG1 BG2 BG2 (Opt) SOD-123 M6 (Opt) LFPAK R23 (Opt) 0603 (Opt) 0603 SNSP FB M7 (Opt) LFPAK R30 PWMOUT *C/10 VREF SNSP SS ISP *SHORT VREF R27 (Opt) 0603 VREF R26 (Opt) 0603 C22 (Opt) R28 (Opt) 0603 FB E21 PWM PWM R31 (Opt) 0603 E22 INTVCC M10 (Opt) SOT-23 *SHORT R25 (Opt) INTVCC D7 (Opt) SOD-523 E23 SS LED(Opt) M9 (Opt) SOT-23 R32 (Opt) 0603 *C/10 PWMOUT M11 (Opt) SOT-23 E24 C28 (Opt) PVIN PVIN 10mm Dia. Surface Mount L2 4.7µH C23 + 47µF 80V (Opt) C24 4.7µF 100V 1210 (Opt) 7443551470 C25 Wurth Electronik 4.7µF (Opt) 100V 1210 (Opt) GND PVIN L3 4.7µH C26 4.7µF 100V 1210 (Opt) M12 (Opt) LFPAK 7443551470 C27 Wurth Electronik 4.7µF (Opt) 100V 1210 (Opt) APPROVALS PCB DES. APP ENG. SCALE = NONE TECHNOLOGY 1630 McCarthy Blvd. Milpitas, CA 95035 www.linear.com Phone: (408)432-1900 Fax: (408)434-0507 LTC CONFIDENTIAL - FOR CUSTOMER USE ONLY TITLE: SCHEMATIC 60VIN, 60VOUT FOUR-SWITCH SYNCHRONOUS BUCK-BOOST CONTROLLER SIZE IC NO. REV. LT3790EFE N/A 1 DC2123A MODIFY DATE: Nov 24, 2014 SHEET 2 OF 2