1 2 3 4 5 6 NOTE: UNLESS OTHERWISE SPECIFIED ECO 1. ALL RESISTORS ARE IN OHMS 0603 A REV __ ALL CAPACITORS ARE IN MICROFARADS 0603 7 REVISION HISTORY DESCRIPTION 1 APPROVED DATE VLAD O. 12/2/09 PRODUCTION A VDD E1 R2 3.3K 1 + CIN1 (Opt.) 1 R1 3.3K 1 VDD 12V or 5V D2 LED (GREEN) D3 LED (RED) U1* E2 R3 3.3K TIMER INTVCC EN1 E6 3 EN2 E7 12 E9 C1 0.1uF 16V E12 5 13 GATE 10 TIMER 11 E8 ISET 15 E10 IMON 14 E11 RMON 20K 0805 3 2 1 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 2 RSET (Opt.) 0805 3 ISET 4 K.L. APP ENG. VLAD O. U1 -A LTC4219IDHC-12 -B LTC4219IDHC-5 TECHNOLOGY TITLE: SCHEMATIC SIZE N/A SCALE = NONE 5 DATE: IC NO. C ASSY. APPROVALS PCB DES. IMON * ENABLE2 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. 1 PG INTVCC CUSTOMER NOTICE D GND B PG JP3 EN2 DISABLE2 ENABLE1 DISABLE1 OFF ON JP2 EN1 OUT 12V / 5.4A or 5V / 5.4A D4 LED (GREEN) D5 LED (EMBER) RGATE (Opt.) C JP1 CT E4 1 R6 (Opt.) CGATE (Opt.) FLT C2 0.1uF 16V VDD 3 2 1 3 2 1 VDD 4 FB R5 3.3K + COUT2 (Opt.) 2 2 R4 (Opt.) 9 8 7 1 E5 OUT OUT OUT + COUT1 22uF 25V 2 FLT VDD VDD GND EN2 1 16 6 EN1 E3 2 GND 2 2 D1 SMAJ22A B 8 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only POSITIVE 12V INTEGRATED HOT SWAP / POSITIVE 5V INTEGRATED HOT SWAP 6 REV. LTC4219IDHC-12 / LTC4219IDHC-5 DEMO CIRCUIT 1594A-A/B Wednesday, December 02, 2009 7 D 1 SHEET 1 8 OF 1