Datasheet

LTM4618
8
4618fa
DECOUPLING REQUIREMENTS
Figure 1. Simplifi ed LTM4618 Block Diagram
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
C
IN
External Input Capacitor Requirement
(V
IN
= 4.5V to 26.5V, V
OUT
= 2.5V)
I
OUT
= 6A 10 µF
C
OUT
External Output Capacitor Requirement
(V
IN
= 4.5V to 26.5V, V
OUT
= 2.5V)
I
OUT
= 6A 200 µF
T
A
= 25°C. Use Figure 1 confi guration.
SIMPLIFIED BLOCK DIAGRAM
PIN FUNCTIONS
additional decoupling of the 5V internal regulator.
V
OUT
(BANK 3: J1-J4, K1-K4, L1-L4, M1-M4): Power Out-
put Pins. Apply output load between these pins and PGND
pins. Recommend placing output decoupling capacitance
directly between these pins and PGND pins.
SW (K6): Switching Node of the Circuit. This pin is used
to check the switching frequency. Leave pin fl oating. A
resistor-capacitor snubber can be placed from SW to
PGND to eliminate high frequency switch node ringing.
See the Applications Information section.
4618 F01
M1
M2
POWER
CONTROL
INTERNAL
COMP
INTERNAL
FILTER
C
SS
INTERNAL
FILTER
10µF
1.5µF
1.5µH
60.4k
C
IN
+
V
IN
4.5V TO 26.5V
≤6V V
IN
TIE V
IN
, INTV
CC
AND
EXTV
CC
TOGETHER
C
OUT
R
FB
28k
+
V
OUT
2.5V/6A
V
FB
PGND
SW
PGND
EXTV
CC
INTV
CC
INTV
CC
MODE/PLLIN
TK/SS
RUN
PGOOD
COMP
FREQ
SGND