5 4 3 2 1 REVISION HISTORY C3 (OPT) ECO REV - 1 APPROVED DESCRIPTION PRODUCTION DATE Vlad Ostrerov 09/25/12 1000pF 0805 D5 D * VIN VOUT -30 TO 0V REVERSE PROTECTED UV PROTECTED 0V TO 6V 6V TO 15V E1 * (LOW CURRENT MOSFET, SMALL PACKAGE OPTION) G1 Q1A SI4230DY-T1-GE3 D6 DFLT20A (OPT) E2 GND Q1B SI4230DY-T1-GE3 (UV = 6V) (OV = 15V) VIN VIN G2 GATE ON OV PROTECTED 15V TO 30V C Q2A 2N7002V-7 (OPT) D1 S1 D BZT52C15T (OPT) Q2B 2N7002V-7 (OPT) S2 D2 E6 VOUT R4 510K R1 1M 1% D7 DFLT40A (OPT) R2 54.9K 1% E3 UV C1 4.7uF 50V (OPT) U1 1 VIN GATE 8 2 UV VOUT 7 3 OV FAULT 6 4 GND SHDN 5 E4 + C2 47uF 35V (OPT) * VOUT 8A MAX C E7 GND E8 FAULT OV SHDN EN R3 36.5K 1% LTC4365CTS8 1 2 B B 3 DIS JP1 E5 SHDN LED DRIVE D4 1N4148WT 1 VIN VOUT CONNECT LED 2 3 CLD1 CCLM2000 2 3 OPEN JP2 1 JP3 CLD3 CCLM2000 CLD2 CCLM2000 A D1 GRN VIN D2 GRN VOUT D3 RED FAULT 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 PCB DES. VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APP ENG. APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 4 APPROVALS 3 TECHNOLOGY RB Vlad O. A LTC CONFIDENTIAL - FOR CUSTOMER USE ONLY TITLE: SCHEMATIC SIZE N/A SCALE = NONE 1630 McCarthy Blvd. Milpitas, CA 95035 www.linear.com Phone: (408)432-1900 Fax: (408)434-0507 HIGH VOLTAGE NFET DRIVER UV, OV AND REVERSE SUPPLY PROTECTION IC NO. REV. LTC4365CTS8 1 DEMO CIRCUIT 1555B MODIFY DATE: Sep 25, 2012 2 SHEET 1 1 OF 1