5 4 3 2 1 VIN E1 MAIN VIN TP3 CPO 2 ENLDO1 3 ENLDO2 CPO C2M C2P JP3 ENLDO1 1 5 11 1.8V V+ HI 7 D4 D5 TP4 D M2 TP6 MLED2 8 MLED3 9 MLED4 10 M3 TP7 M4 TP8 SLED 6 LDO1 15 LDO2 14 S1 E3 LDO1 1.2V - 1.8V 0 - 200mA C4 1.0uF 10V PGND V2 D3 M1 E4 LDO2 1.8V - 3.3V 0 - 200mA C5 1.0uF 10V 21 12 U1 LTC3230EUD MLED1 RSET 2.8V V1 4 3.3V 13 ENS JP2 V2 1 VIN ENM 18 C3 2.2uF 10V C1M C1P 1.2V D2 TP5 1.8V 1.5V D1 C6 1.0uF 10V 16 17 20 JP1 V1 1 C2 1.0uF 10V 19 C1 1.0uF 10V E2 1 GND D SUB C7 4.7uF 6.3V 2.7V - 5.5V E5 R1 17.4K 1% C LO GND C VIN Q1A V+ JP4 ENLDO2 1 +5V R2 5.1K 5% HI LO R3 5.1K 5% Q2A 1 TP9 ENM CNTL 0.1uF 16V Q2B DC590 ENM JP5 E6 B +5V EXT R6 1.0M 5% EXT ENM 0V - VIN R7 TP1 TP2 C10 0.1uF 16V SDA +5V J1 + + + + + + + + + + + + + + 3 SET 2 VDD VSS 14 6 RC4 RC1 9 8 RC2 RC3 7 5 RC5 RC0 10 3 RA4 RA2 11 4 MCLR# RA0 13 2 RA5 RA1 12 Q1B R4 5.1K 5% R5 5.1K 5% Q3A ENS CNTL 1 B TP10 DC590 Q3B PIC16F630I/ST ENS EXT OUT 5 DIV 4 +5V GND SW1 PIC RESET R9 100K 5% R8 PIC J2 PROG 4 4 2 2 5 5 3 3 1 1 6 6 JP6 E7 1.0M 5% EXT ENS 0V - VIN WARNING! Do not look directly at operating LED. Serious eye damage may occur. C11 0.1uF 16V U2 Vcc R12 5.1K 5% SCLK 1 2 3 A0 A1 A2 7 SDA 5 Vss 6 WP R11 5.1K 5% 4 24LC025 5 5.11K 1% V+ 1N4148 1 OPT HD2X7 A R10 1 C9 0.1uF 16V LTC1799 2 4 6 8 10 12 14 8 1 3 5 7 9 11 13 D6 10K 5% U4 SCL V+ U3 VIN C8 4 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. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 3 CONTRACT NO. APPROVALS DRAWN M. Merchant DATE 1/12/07 CHECKED A TITLE LTC3230EUD, 5-LED Main/Sub Display Driver with Dual LDO APPROVED ENGINEER M. Merchant TECHNOLOGY 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 1/12/07 DESIGNER Friday, September 28, 2007 SIZE CAGE CODE SCALE: 2 FILENAME: DWG NO REV A DC1217A SHEET 1 1 OF 1