LTM4628
siMpliFieD block DiagraM
PGOOD1
TRACK1
SS CAP
1µF
GND
TEMP
CLKOUT
RUN1
MODE_PLLIN
PHASEMD
MBOT1
0.68µH
2.2µF
MTOP1
SW1
V
OUT1
GND
V
OUTS1
COMP1
INTERNAL
COMP
SGND
TRACK2
SS CAP
INTV
CC
4.7µF
EXTV
CC
MTOP2
0.68µH
RUN2
MBOT2
2.2µF
1µF
GND
SW2
V
OUT2
GND
V
OUTS2
COMP2
INTERNAL
COMP
POWER
CONTROL
PGOOD2
V
IN
C
IN3
10µF
35V
C
IN4
10µF
35V
60.4k
V
FB1
R
FB1
40.2k
V
IN
C
IN1
10µF
35V
C
IN2
10µF
35V
100µA =
V
IN
R
T
V
IN
R
T
+
1.5V/8A
C
OUT1
+
1.2V/8A
C
OUT2
+ –
XI
60.4k
V
FB2
R
FB2
60.4k
f
SET
R
fSET
SGND
INTERNAL
FILTER
DIFFOUT
DIFFN
DIFFP
4628 BD
Figure 1. Simplified LTM4628 Block Diagram
Decoupling requireMenTs
SYMBOL
C
IN1
, C
IN3
C
IN2
, C
IN4
C
OUT1
C
OUT2
PARAMETER
External Input Capacitor Requirement
(V
IN1
= 4.5V to 26.5V, V
OUT1
= 1.5V)
(V
IN2
= 4.5V to 26.5V, V
OUT2
= 1.5V)
External Output Capacitor Requirement
(V
IN1
= 4.5V to 26.5V, V
OUT1
= 1.5V)
(V
IN2
= 4.5V to 26.5V, V
OUT2
= 1.5V)
T
A
= 25°C. Use Figure 1 configuration.
CONDITIONS
I
OUT1
= 8A
I
OUT2
= 8A
I
OUT1
= 8A
I
OUT2
= 8A
MIN
TYP
22
22
300
300
MAX
UNITS
µF
µF
µF
µF
4628fd
9
LINEAR_DIMENSIONS [ LINEAR DIMENSIONS SEMICONDUCTOR ]
