DC1516A - Schematic

5
4
3
2
1
REVISION HISTORY
ECO
REV
DESCRIPTION
__
2
PRODUCTION
APPROVED
DATE
MIKE S.
06-07-11
E1
VO_SNS+
E2
VO_SNS-
D
D
E3
VIN+
U1
LTC3833EFE
R25
OPT
C4
OPT
C
R10
15K
E6
R11
10K
6
7
R14
OPT
C6
C7
0.01uF
C9
68pF
33.2k
R15
R16
10
*
INTVCC
R17
SW
VOUT
BG
VOSNS-
PGND
VOSNS+
INTVCC
TRK/SS
VIN
ITH
MODE/PLLIN
VRNG
EXTVCC
RT
RUN
16
15
14
INTVCC
C5
4.7uF
16V
0805
R13
2.2
EXTVCC
11
1
2
3
1
2
3
OPT
Q4
*
R4
10
R5
10
E5
VOUT
RS1
2512
COUT1
100uF
6.3V
1206
*
COUT2
100uF
6.3V
1206
+COUT3
330uF
2.5V
7343
J3
+COUT4
S-
VINVOUT
1.5V / 15A
J4
330uF
2.5V
7343
GND
C
ONLY APPLY LOAD
FROM J3 TO J4
DCR SENSE FILTER / DIVIDER
FSW = 300kHz
VOUT
J5
R21
OPT
J2
C10
1uF
R19
OPT
1
2
3
47uF
35V
SANYO
35SVPD47M
*
R9
D2
OPT
SMA
VIN
4.5V - 24V
C8
0.1uF
25V
13
12
4
RJK0330DPB
Q2
4
+CIN5
GND
R7
*
17
47uF
35V
SANYO
35SVPD47M
*
L1
18
CIN3
1210
OPT
VOUT
C3
OPT
0805
C11
OPT
2
ON
OFF
SNS-
R18
137K
*
VIN
8
9
470pF
JP1
RUN
4
5
R12
0
TRK/SS
3
19
CIN2
10uF
25V
1210
S+
1
*
S-
TG
D1
CMDSH-3
2
*
SNS+
C1
0.1uF
25V
5
2
C2
R3
0
1
2
3
R24
0
*
R2
5
R8
20
1
2
3
VOUT
S+
BOOST
1
R6
PGOOD
SGND
1
CIN1
10uF
25V
1210
OPT
Q3
+CIN4
J1
21
E4
4
RJK0305DPB
Q1
4
2
R1
100K
PGOOD
5
INTVCC
5
VIN
EXTVCC
R23
10k
E9
EXTVCC
JP2
MODE
1
CCM
2
3
DCM
E10
PLLIN
J6
LOAD STEP
10mV / A
5% DUTY MAX
COUT6
OPT
1206
Q5
SUD50N03-12P
1
E7
3
B
COUT5
OPT
1206
B
PULSE
GEN
E8
R20
10K
GND
R22
0.01
2010
LOAD STEP CIRCUIT
NOTES: UNLESS OTHERWISE SPECIFIED
1. ALL RESISTORS ARE IN OHMS, 0603.
ALL CAPACITORS ARE IN MICROFARADS, 0603.
CUSTOMER NOTICE
2. INSTALL SHUNTS ON JUMPERS AS SHOWN.
A
*
ASSY
-A (DCR SENSE)
-B (RSENSE)
C2
0.1uF
1000pF
R3
4.02k
OPT
R6,R8 R7
OPT
10
13.3k
OPT
R9,R17 R16 RS1
0
OPT
OPT
0
0
0.0025
L1
0.56uH
0.68uH
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
4
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.
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.
3
TECHNOLOGY
KT
MIKE S.
TITLE: SCHEMATIC
WIDE INPUT RANGE, HIGH EFFICIENCY STEP-DOWN DC-DC CONVERTER
SIZE
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.
LTC3833EFE
REV.
2
DEMO CIRCUIT 1516A
Tuesday, June 07, 2011
SHEET
1
1
OF 1
A
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