5
dc1632af
DEMO MANUAL DC1632A
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
SCHEMATIC DIAGRAM
5
5
4
4
3
3
2
2
1
1
D
D
C
C
B
B
A
A
OPTIONAL DCR
SENSE FILTER /
DIVIDER FOR
PHASE 1
4.5V - 14V
FCM
DCM
OPTIONAL DCR
SENSE FILTER /
DIVIDER FOR
PHASE 2
SYNC
60 DEG
90 DEG
OFF
120 DEG
ON
RUN
FSW = 300kHz
1.5V / 40A
5mV / A
LOAD STEP CIRCUIT
LOAD STEP
5% DUTY CYCLE MAX
VOUT
ALL CAPACITORS ARE IN MICROFARADS, 0603.
NOTES: UNLESS OTHERWISE SPECIFIED
2. INSTALL SHUNTS ON JUMPERS AS SHOWN.
1. ALL RESISTORS ARE IN OHMS, 0603.
OPTIONAL COUT
SGND
GND
VIN
INTVCC
S2+
S1+
EXTVCC
EXTVCC
VIN
S2-
INTVCC
S1-
INTVCC
VOUT
INTVCC
INTVCC
VOUT
INTVCC
S2+
S2-
S1+
S1-
VOUT
SIZE
DATE:
.
V
E
R
.
O
N
CI
SHEET
OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY
Fax: (408)434-0507
Milpitas, CA 95035 Phone: (408)432-1900
1630 McCarthy Blvd.
LTC Confidential-For Customer Use Only
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
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
2
Tuesday, January 10, 2012
11
FAST TRANSIENT STEP-DOWN DC/DC CONVERTER
HZ
MIKE S.
N/A
LTC3839EUH
DEMO CIRCUIT 1632A
SIZE
DATE:
.
V
E
R
.
O
N
CI
SHEET
OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY
Fax: (408)434-0507
Milpitas, CA 95035 Phone: (408)432-1900
1630 McCarthy Blvd.
LTC Confidential-For Customer Use Only
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
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
2
Tuesday, January 10, 2012
11
FAST TRANSIENT STEP-DOWN DC/DC CONVERTER
HZ
MIKE S.
N/A
LTC3839EUH
DEMO CIRCUIT 1632A
SIZE
DATE:
.
V
E
R
.
O
N
CI
SHEET
OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY
Fax: (408)434-0507
Milpitas, CA 95035 Phone: (408)432-1900
1630 McCarthy Blvd.
LTC Confidential-For Customer Use Only
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
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
2
Tuesday, January 10, 2012
11
FAST TRANSIENT STEP-DOWN DC/DC CONVERTER
HZ
MIKE S.
N/A
LTC3839EUH
DEMO CIRCUIT 1632A
REVISION HISTORY
DESCRIPTION
DATE
APPROVED
ECO
R
EV
MIKE S.
PRODUCTION
11-
8-
11
2
__
REVISION HISTORY
DESCRIPTION
DATE
APPROVED
ECO
R
EV
MIKE S.
PRODUCTION
11-
8-
11
2
__
REVISION HISTORY
DESCRIPTION
DATE
APPROVED
ECO
R
EV
MIKE S.
PRODUCTION
11-
8-
11
2
__
CIN5 OPT 1210
CIN5 OPT 1210
R4
10
R4
10
E13
PULSE
GEN
E13
PULSE
GEN
R6 OPT
R6 OPT
COUT6 100uF 6.3V 1206
COUT6 100uF 6.3V 1206
R7
0
R7
0
C9
0.01uF
C9
0.01uF
R10 OPT
R10 OPT
CIN4 22uF 16V 1210
CIN4 22uF 16V 1210
Q9 SUD50N03-12P
Q9 SUD50N03-12P
3
1
2
C11 1nF
C11 1nF
+
COUT12
OPT
7343-D15T
+
COUT12
OPT
7343-D15T
R2 OPT
R2 OPT
JP2
PHASMD
JP2
PHASMD
1
2
3
4
C3 1nF
C3 1nF
Q4
INFINEON BSC010NE2LS
Q4
INFINEON BSC010NE2LS
2
4
5
3
1
6
7
8
R23
0
R23
0
E15
ISTEP+
E15
ISTEP+
R26
10
R26
10
R17 10
R17 10
+
COUT10
OPT
7343-D15T
+
COUT10
OPT
7343-D15T
C4 4.7uF 16V 0805
C4 4.7uF 16V 0805
JP1JP1
1
3
2
E21
GND
E21
GND
R14
2.2
R14
2.2
E5
CLKOUT
E5
CLKOUT
+
CIN1 180uF 16V
+
CIN1 180uF 16V
J1J1
1
2
3
4
5
E22E22
E20
VOUT
E20
VOUT
RS1
0.002 2512
RS1
0.002 2512
E7
EXTVCC
E7
EXTVCC
R27 10
R27 10
R16 OPT
R16 OPT
Q5
OPT
Q5
OPT
2
4
5
3
1
6
7
8
L1
0.44uH
L1
0.44uH
+
OPT
7343-D15T
COUT9
+
OPT
7343-D15T
COUT9
E6
TRK/SS
E6
TRK/SS
R35
0
R35
0
R13
137K
R13
137K
C8
470pF
C8
470pF
E10
GND
E10
GND
+
COUT4 330uF
7343-D15T
2.5V
+
COUT4 330uF
7343-D15T
2.5V
JP3
MODE
JP3
MODE
1
2
3
4
R34 0.005 2010
R34 0.005 2010
D2
CMDSH-3
D2
CMDSH-3
R21 OPT
R21 OPT
R24 OPT
R24 OPT
C13 1uF
C13 1uF
R9 OPT
R9 OPT
R25 0
R25 0
R11 10K
R11 10K
CIN6 OPT 1210
CIN6 OPT 1210
C7 0.1uF
C7 0.1uF
C10 OPT
C10 OPT
E3
VIN-
E3
VIN-
Q3
INFINEON BSC050NE2LS
Q3
INFINEON BSC050NE2LS
2
4
5
3
1
6
7
8
E19E19
D1
CMDSH-3
D1
CMDSH-3
E17
VIN
E17
VIN
R20
O
PT
R20
O
PT
R31 OPT
R31 OPT
E14
GND
E14
GND
CIN3 22uF 16V 1210
CIN3 22uF 16V 1210
CIN7 1210 OPT
CIN7 1210 OPT
L2
0.44uH
L2
0.44uH
R8
OPT
R8
OPT
+
CIN2 OPT SANYO-F8
+
CIN2 OPT SANYO-F8
C6
68pF
C6
68pF
R29 10K
R29 10K
E11
GND
E11
GND
E8
E8
E18
GND
E18
GND
C12
0.1uF
C12
0.1uF
C2
0.1uF
C2
0.1uF
R28
0
R28
0
R18
OPT
R18
OPT
R22 15K
R22 15K
+
COUT3 330uF
7343-D15T
2.5V
+
COUT3 330uF
7343-D15T
2.5V
Q1
INFINEON BSC050NE2LS
Q1
INFINEON BSC050NE2LS
2
4
5
3
1
6
7
8
RS2
0.002
2512
RS2
0.002
2512
U1
LTC3839EUH
U1
LTC3839EUH
PHASEMD
1
MODE/PLLIN
2
CLKOUT
3
SGND
4
ITH
6
TRACK/SS
7
SGN
D
29
SENSE2
-
30
SENSE2
+
31
VO
8
VOU
TSEN
SE-
9
SENSE1
+
10
VRNG
32
PGN
D
33
RT
5
SENSE1
-
11
DTR
12
PGOOD
13
BOOST1
14
TG1
15
SW1
16
BG1
17
DRVCC1
18
VIN
19
PGND
20
INTVCC
21
EXTVCC
22
DRVCC2
23
BG2
24
SW2
25
TG2
26
BOOST2
27
RUN
28
+
COUT2 330uF
7343-D15T
2.5V
+
COUT2 330uF
7343-D15T
2.5V
E16
ISTEP-
E16
ISTEP-
R5
10
R5
10
E2
VIN+
E2
VIN+
COUT5 100uF 6.3V 1206
COUT5 100uF 6.3V 1206
R32 100K
R32 100K
E4
PLLIN
E4
PLLIN
E9
VO_SNS-
E9
VO_SNS-
Q7
OPT
Q7
OPT
2
4
5
3
1
6
7
8
Q6 OPT
Q6 OPT
2
4
5
3
1
6
7
8
E1
RUN
E1
RUN
Q2
INFINEON BSC010NE2LS
Q2
INFINEON BSC010NE2LS
2
4
5
3
1
6
7
8
R15
22.1K
R15
22.1K
C5 1uF
C5 1uF
R12 2.2
R12 2.2
R19 10
R19 10
R3 0
R3 0
+
COUT1 330uF
7343-D15T
2.5V
+
COUT1 330uF
7343-D15T
2.5V
Q8 OPT
Q8 OPT
2
4
5
3
1
6
7
8
R1 OPT
R1 OPT
R33 10K
R33 10K
C1 OPT
C1 OPT
+
COUT11
OPT
7343-D15T
+
COUT11
OPT
7343-D15T
E12
PGOOD
E12
PGOOD
CIN8 1210 OPT
CIN8 1210 OPT
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
