5 4 3 2 1 REVISION HISTORY ECO REV __ 3 DESCRIPTION PRODUCTION APPROVED DATE MITCHEL L. 04-06-16 E3 E1 Q1 FDB33N25 INPUT INPUT 2 INPUT RSNS 0.040 3 1 D J2 RDRN 240k 1206 VCC R1 20k 1206 C1A 2.2uF 100V 1210 SNS OUT * EP TMR E7 ON SEL 11 6 7 CLAMP 3 4 1 2 45V 27V JP1 HD2X2-079 E8 GND ON OFF C GND E6 GND FLT GND CTMR1 10uF 10V 1206 E5 B 8 10 9 ON TMR DFN10DD-3X3 CTMR2 OPT 1206 2 4 5 4 GATE VCC SNS 3 2 1 U1 1 3 JP2 HD2X2-079 C2 47nF 100V DRN C GND RLED1 3.6k 1206 LED 1 2 C1B OPT 1210 E4 J4 15V OPT R2 33 D1 CMHZ5266B 68V J3 RLED2 3.6k 1206 D6 DDZ9702S 1 2 GATE CL 22uF 50V 2 R3 10 CSNUB 10nF 500V 1206 GND DLED GREEN 1 RSNUB 100 1210 E2 + OUT J1 OUTPUT OUTPUT D E9 FLT B OPERATING LIMITS SYSTEM VOLTAGE CLAMP SELECT DC OPERATING DC SURVIVAL SURGE RIDE-THROUGH 1ms TRANSIENT CURRENT LIMIT MAXIMUM LOAD NOTE: UNLESS OTHERWISE SPECIFIED 12V 24 / 28V 27V 45V 4.2V TO 19V 4.2V TO 35V 80V ISO-7637-2 TEST PULSE 5A 250V 1.25A 1A 0.5A 1. ALL RESISTORS AND CAPACITORS ARE 0805. A * ASSY A B U1 LTC4380-1 LTC4380-2 SUFFIX 1 2 TOP MARK LGHQ LGHS BEHAVIOR LATCH OFF AUTO RETRY CUSTOMER NOTICE APPROVALS LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES. KIM T. VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED APP ENG. MITCHELL L. CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. TECHNOLOGY TITLE: SCHEMATIC SIMPLE SURGE STOPPER SIZE THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 4 3 N/A SCALE = NONE 2 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only DATE: IC NO. LTC4380IDD-1/-2 REV. 3 DEMO CIRCUIT 2178A Wednesday, April 06, 2016 SHEET 1 1 OF 1 A