Datasheet
7
dc1477af
DEMO MANUAL DC1477A
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
3A MAX
RUN
ON
OFF
DCM
CCM
(BURST / PULSE SKIP) PS
OFF
SSO (SOFT START ON)
LO (LDO ON)
30V
MODE
Derating Necessary for Certain Input
and Output Voltages.
*
START
DCM
SOFT
START ON
LDO ON
OFF
MODE
OFF
SSO
BURST/
LO
START
CCM CCM
DCM
*
SKIP_CYCLE
**
*
*
10V - 36V
50V50V
LTM4609EV
PS
50V
A
DC1477A
Wednesday, May 27, 2009
1
1
HELEN
8/28/08
JUDY S.
8/28/08
High Output Buck-Boost Power uModule
LTM4609EV High Density,
SIZE
SCALE:
CAGE CODE
DWG NO
REV
SHEET
OF
FILENAME:
TITLE
CONTRACT NO.
APPROVALS
DATE
DRAWN
CHECKED
APPROVED
ENGINEER
DESIGNER
TECHNOLOGY
1630 McCarthy Blvd.
Milpitas, CA 95035
Pho ne: (408)432-1900
Fax : (408)434-0507
VSS
VIN
INTVCC
VOUT
VIN1
INTVCC
VIN1
INTVCC
VIN1
D1
CMDZ5230B
2 1
C5
(OPT)
JP3
1
2
3
4
CO1
(OPT)
RS1
0.015
TP9
EXTVCC
R1
100K
R5
2.74K
1%
C2 (OPT)
CO6
100uF
35V
Csnb2 (OPT)
TP4
GND
TP15
INTVCC
TP5
PGOOD
CO7
(OPT)
35V
R8 20K
L1
3.3uH
CO2
(OPT)
JP2
1
2
3
Cin4
4.7uF
RS2
0.015
Rsnb2 (OPT)
CSS
0.1uF
CO3
10uF
35V
Cin3
4.7uF
R9
(OPT)
1%
TP1
VIN
+
Cin1
50V
100uF
CO8
(OPT)
R2
51K
TP10
L3 0.4uH
TP13
SGND
CO4
10uF
35V
CO5
100uF
35V
TP2
VIN+
TP7
VO+
D2
CMDZ5230B
2 1
Csnb1 (OPT)
TP3
VIN-
C4 (OPT)
TP8
VOUT
CP
(OPT)
Cin2
4.7uF
Rsnb1 (OPT)
RS3
(OPT)
TP11
VO-
Cin5
(OPT)
JP1
1
2
3
L2 0.4uH
JP4
1
2
3
4
R6 4.64K
R7
1.21K
CFF
(OPT)
RUVLO
(OPT)
TP12
SOFT START
TP14
EXT. CLOCK
U1
L12
K11
J10
M10
L11
L10
K12
J11
J12
K10
C11
C10
C9
C8
C7
C5
C4
C3
C2
C1
B4
B3
B2
C6
B1
A3
A2
A1
G2
G3
G4
H1
H2
H3
H4
B7
F6
A6
G5
C12
D1
D2
D3
D4
D9
D8
D7
D6
D5
D10
B6
J1
J8
G1
E2
E1
M11
M12
F5
B5
A8
B8
B9
A9
A10
A7
D11
D12
E3
E4
E5
E6
E7
E8
E9
E10
E11
E12
A11
A12
B10
B11
B12
A4
A5
G6
G7
G8
G9
G10
G11
G12
H5
H6
H7
H8
H9
H10
H11
H12
J5
J6
J7
K5
K6
L5
L6
M5
M6
F10
F11
F12
F1
F2
F3
F4
J2
J3
J4
K1
K2
K3
K4
L1
L2
L3
L4
M1
M2
M3
M4
J9
K7
K8
K9
L7
L8
L9
M7
M8
M9
F8
F9
F7
VIN
VIN
VIN
VIN
VIN
VIN
VIN
VIN
VIN
VIN
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
COMP
EXTVCC
SS
RSENSE
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
VFB
SW1
SW2
VOUT
VOUT
VOUT
VIN
VIN
INTVCC
PGOOD
RUN
PLLFLTR
PLLIN
FCB
STNDBY
SGND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
SENSE+
SENSE-
RSENSE
RSENSE
RSENSE
RSENSE
RSENSE
RSENSE
RSENSE
RSENSE
RSENSE
RSENSE
RSENSE
RSENSE
RSENSE
RSENSE
RSENSE
RSENSE
RSENSE
RSENSE
RSENSE
RSENSE
RSENSE
RSENSE
RSENSE
RSENSE
RSENSE
RSENSE
RSENSE
VOUT
VOUT
VOUT
VOUT
SW1
SW1
SW1
SW1
SW1
SW1
SW1
SW1
SW1
SW1
SW1
SW1
SW1
SW1
SW1
SW2
SW2
SW2
SW2
SW2
SW2
SW2
SW2
SW2
SW2
NC
NC
NC