Datasheet
7
dc1543afa
DEMO MANUAL DC1543A
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
A
A
B
B
A A
B B
IOSTEP
VOUT
Latch Clear
0.8V 1.2V 1.5V 1.8V 3.3V 5.0V 6.0V
VOUT
SELECT
OFF
ON
RUN
TRACK SS
DCM CCM
NON-LATCH
LATCH
OFFON
INPUT
UVLO
INPUT
OVLO
NON-LATCH
INPUT OVP
OVER-TEMP
0.8V - 6V
@10A
10V 10V
10V 10V
10V
MODE
TRACK/SS
4.5V - 38V
ON OFF
ON OFF
DYNAMIC LOAD CIRCUIT
1.0V
BEHAVIOR
10V
FSET
OPT
OPT
WITH INPUT AND OUTPUT OVP
10A STEP-DOWN μMODULE REGULATOR
VOUT>3.0V
VOUT<=3.0V
2. ALL CAPACITORS ARE 0603.
NOTE: UNLESS OTHERWISE SPECIFIED
1. ALL RESISTORS ARE 0603
CLK
R
INTVCC
VIN+
VINL
INTVCC
INTVCC
VINL
1VREF
1VREF
VO+
VO-
VO+
INTVCC
VO-
INTVCC
SIZE
DATE:
IC NO. REV.
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
Monday, May 21, 2012
11
HZ
YAN L.
N/A
LTM4641EY
DEMO CIRCUIT 1543A
SIZE
DATE:
IC NO. REV.
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
Monday, May 21, 2012
11
HZ
YAN L.
N/A
LTM4641EY
DEMO CIRCUIT 1543A
SIZE
DATE:
IC NO. REV.
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
Monday, May 21, 2012
11
HZ
YAN L.
N/A
LTM4641EY
DEMO CIRCUIT 1543A
REVISION HISTORY
DESCRIPTION DATEAPPROVEDECO REV
YAN L.PRODUCTION2 6-22-11
__
REVISION HISTORY
DESCRIPTION DATEAPPROVEDECO REV
YAN L.PRODUCTION2 6-22-11
__
REVISION HISTORY
DESCRIPTION DATEAPPROVEDECO REV
YAN L.PRODUCTION2 6-22-11
__
R3
10K
R3
10K
JP14JP14
1
2
3
R32 10KR32 10K
JP5JP5
R21
1.18K
R21
1.18K
+
CO8
150uF
+
CO8
150uF
TS2
SW
TS2
SW
E11
GND
E11
GND
JP10JP10
1
2
3
E12
VO+
E12
VO+
R15 2.2MR15 2.2M
E18
TRACK
E18
TRACK
E2
DRVCC
E2
DRVCC
RS2 0.05
1% 2512
RS2 0.05
1% 2512
R25
3.16K
R25
3.16K
R34
0
R34
0
R9
187k
R9
187k
C7
OPT
C7
OPT
C8
8.2nF
C8
8.2nF
JP11JP11
1
2
3
R13
2.49K
0.1%
R13
2.49K
0.1%
JP2JP2
Q2
Si7164DP
Q2
Si7164DP
2
4
5
6
7
8
1
3
JP15JP15
1
2
3
CIN5CIN5
R5
100K
R5
100K
J6J6
1
2
3
4
5
E8
VIN+
E8
VIN+
R20
2.94K
R20
2.94K
JP13JP13
1
2
3
JP17JP17
1
2
3
JP6JP6
Q1
SUD50N03-09P-E3
Q1
SUD50N03-09P-E3
1
2 3
E15
VO-
E15
VO-
+
CO1
150uF
+
CO1
150uF
R1
13.7K
R1
13.7K
R31
0
R31
0
RS1 0.05
1% 2512
RS1 0.05
1% 2512
R17
165K
R17
165K
+
CIN1
100uF
50V
+
CIN1
100uF
50V
E5
PGOOD
E5
PGOOD
R28
24.9K
R28
24.9K
E20
SGND
E20
SGND
E6
TEMP
E6
TEMP
J3
VOUT
J3
VOUT
R35 (OPT)R35 (OPT)
J1
VIN
J1
VIN
R4
(OPT)
R4
(OPT)
E16
VORB+
E16
VORB+
C3
(OPT)
C3
(OPT)
J4
GND
J4
GND
R33
(OPT)
R33
(OPT)
JP4JP4
R29
(OPT)
R29
(OPT)
CO4
47uF
1210
CO4
47uF
1210
J2
VIN-
J2
VIN-
CIN3
4.7uF
50V
1210
CIN3
4.7uF
50V
1210
R23
576
R23
576
JP7JP7
E7
IOSTEP
E7
IOSTEP
C5
100pF
C5
100pF
C10
3.3nF
C10
3.3nF
R11
(OPT)
R11
(OPT)
R2
680k
R2
680k
U1
LTM4641EY
U1
LTM4641EY
VINH
K7
VINL
J3
UVLO
B4
HYST
A4
OVLO
B5
IOVRETRY
A6
FSET
J2
VOUT
C9
VOSNS-
H2
VORB-
D2
CROWBAR
B9
SGND
A3
SGND
A2
SGND
A1
GND
A7
1VREF
C6
OVPGM
B10
GND
B6
OTBH
D3
SGND
B1
SGND
B2
SGND
B3
SGND
C1
SGND
C2
SGND
C3
SGND
C4
SGND
K1
SGND
K3
SGND
L3
SGND
M1
SGND
M2
SGND
M3
GND
A8
GND
A9
GND
A10
GND
A11
GND
A12
GND
B7
GND
B8
GND
B11
GND
B12
GND
C7
GND
C8
GND
D6
GND
D7
GND
D8
GND
E1
GND
E2
GND
E3
GND
E4
GND
E5
GND
E6
GND
E7
GND
E8
GND
F1
GND
F2
GND
F3
GND
F4
GND
F5
GND
F6
GND
F7
GND
F8
GND
F9
GND
F10
GND
F11
GND
F12
GND
G1
GND
G2
GND
G3
GND
G4
GND
G5
GND
G6
GND
G7
GND
G8
GND
G9
GND
G10
GND
G11
GND
G12
GND
H3
GND
H4
GND
H5
GND
H8
GND
H7
GND
H6
GND
H12
GND
H11
GND
H9
GND
J5
GND
J6
GND
J7
GND
J8
GND
J12
GND
J11
GND
J10
GND
J9
GND
K5
GND
K6
GND
K12
GND
K11
GND
L4
GND
L5
GND
L6
GND
M4
GND
M5
GND
M6
VOUT
C10
VOUT
C11
VOUT
C12
VOUT
D9
VOUT
D10
VOUT
D11
VOUT
D12
VOUT
E9
VOUT
E10
VOUT
E11
VOUT
E12
VINH
K8
VINH
K9
VINH
K10
VINH
L7
VINH
L8
VINH
L9
VINH
L10
VINH
L11
VINH
L12
VINH
M7
VINH
M8
VINH
M11
VINH
M12
FCB
K2
TMR
D4
TRACK/SS
L2
RUN
D5
VING
M9
VINGP
M10
VOSNS+
H1
VORB+
D1
DRVCC
J4
INTVCC
K4
COMP
J1
SW
H10
PGOOD
L1
TEMP
A5
_LATCH
C5
E17
VORB-
E17
VORB-
R36 (OPT)R36 (OPT)
CO3
47uF
1210
CO3
47uF
1210
E19
RUN
E19
RUN
R12
10
R12
10
J5J5
1
2
3
4
5
R18
7.15K
R18
7.15K
C2
4.7uF
C2
4.7uF
C4
(OPT)
C4
(OPT)
R7 100KR7 100K
R6 0R6 0
R27
(OPT)
R27
(OPT)
JP3JP3
C6
(OPT)
C6
(OPT)
D2
CMOZ43V
D2
CMOZ43V
2 1
R10
1.78M
R10
1.78M
R19
4.12K
R19
4.12K
R26
2.49K
0.1%R26
2.49K
0.1%
TS1
COMP
TS1
COMP
Q3
PH2625L
Q3
PH2625L
1
2
5
3
4
R22
715
R22
715
TS3
CROWBAR
TS3
CROWBAR
CIN4
4.7uF
50V
1210
CIN4
4.7uF
50V
1210
CO5
47uF
1210
CO5
47uF
1210
R8 10R8 10
JP8JP8
R16 1MR16 1M
C9
8.2nF
C9
8.2nF
+
CO2
150uF
+
CO2
150uF
R24
13K
R24
13K
JP9JP9
1
2
3
+
CIN2
100uF
50V
+
CIN2
100uF
50V
JP1JP1
JP12JP12
1
2
3
JP16JP16