DC829A - Schematic

5
3
2
C18
10uF
10V
1206
HD2X3-079
R1
10
Q3
Si3447BDV
OPT
C5
47uF
6.3V
1210
6
5
2
1
6
5
2
1
1
C7
10uF
10V
1206
D1
B320A
OPT
3
4
2
150uF
4V
OPT
RUN/SS
C15
OPT
IPRG1
E10
SGND
R10
10K
IPRG1
E13
BG2 13
PGND 16
14 RUN/SS
6 VREF
1%
R4
187K 1%
C11
470pF
IPRG2 2
VFB2 7
R3
OPT
C16
OPT
C13
330pF
R8
15K
B
D2
B320A
IHLP-2525CZ-01
OPT
L2
1.5uH
C4
47uF
6.3V
1210
D3
B320A
OPT
R5
0
ITH2 8
C12
100pF
Q2A
Si7540DP
2
Q6
Si3460DV
OPT
3
PGOOD 9
PLLLPF 3
23 IPRG1
24 VFB1
D
GND
7
8
TG2 15
SW2 10
19 BG1
18 SYNC/SSEN
E6
VIN
2.75V - 8V
5
6
VIN 5
17 TG1
22 SW1
1 ITH1
R12
0
VIN
Q5
Si3460DV
OPT
3
4
RUN/SS
E8
3
Q4
Si3447BDV
OPT
1
IHLP-2525CZ-01
PGND 12
SENSE2+ 11
SGND
2
C17
10uF
10V
1206
Q2B
Si7540DP
1
4
8
7
20 PGND
21 SENSE1+
4
PGND 25
6
5
U1
LTC3776EUF
C2
22uF
10V
1210
OPT
3
3
0603
L1
1.5uH
+ C6
E4
GND
1
VOUT1 (VDDQ)
2.5V ( [email protected])
E2
VOUT1
C1
22uF
10V
1210
C3
1uF 10V
4
Q1B
Si7540DP
Q1A
Si7540DP
R2
1M
E1
C14
2200pF
C10
0.01uF
R9
6.2K
R6
10K
C8
10uF
10V
1206
VOUT2 (VTT)=VOUT1 /2
1.25V ([email protected])
E3
VOUT2
C9
+ 150uF
E5
4V
OPT
GND
C
2
1
1
2
VIN
2
D
3
1
2
5
6
300K/550K/750KHz
VIN
5
4
4
SPREAD SPECTRUM
JP1
MODE
4
6
SYNC
C
1
E12
1
2
5
6
SYNC
4
VIN
1%
PGOOD
E7
IPRG2
E11
IPRG2
PLLLPF
E9
VIN
C19
OPT
R11
10K
PGOOD
PLLLPF
B
R7
59K
1%
A
NOTES: UNLESS OTHERWISE SPECIFIED
1. ALL RESISTORS ARE IN OHMS, 0402.
ALL CAPACITORS ARE 0402.
2. INSTALL SHUNT ON JP1 PIN 1 AND 2.
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
CIRUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
CONTRACT NO.
APPROVALS
DRAWN:
TITLE:
CHECKED:
APPROVED:
ENGINEER:
CHARLIE Z.
DESIGNER:
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
4
3
TECHNOLOGY
KIM T.
SIZE
A
DATE:
2
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
2-PHASE DUAL STEP-DOWN CONVERTER
FOR DDR/QDR MEMORY TERMINATION
DWG NO.
DC829A - LTC3776EUF
Friday, October 08, 2004
SHEET
1
1
REV
A
OF 1
A
Similar pages