ltm4619 Linear Technology Corporation, ltm4619 Datasheet - Page 7

• Manufacturer Part Number: ltm4619
• Description: Dual, 26vin, 4a Dc/dc ?module Regulator
• Manufacturer: Linear Technology Corporation

SIMPLIFIED BLOCK DIAGRAM
DECOUPLING REQUIREMENTS
SYMBOL
C
C
C
IN
OUT1
OUT2
= UVLO THRESHOLD = 1.22V
R1 R2
R2
• V
PARAMETER
External Input Capacitor Requirement
(V
External Output Capacitor Requirement
(V
IN
IN
IN
= 4.5V to 26.5V, V
= 4.5V to 26.5V, V
V
IN
R1
R2
MODE/PLLIN
OUT1
OUT1
C
C
SS1
SS2
PGOOD
EXTV
COMP1
COMP2
TK/SS1
TK/SS2
INTV
SGND
RUN1
RUN2
= 2.5V, V
= 2.5V, V
FREQ
CC
CC
*USE EXTV
OUT2
OUT2
INTERNAL
INTERNAL
INTERNAL
Figure 1. Simplifi ed LTM4619 Block Diagram
FILTER
COMP
COMP
= 3.3V)
= 3.3V)
CC
FOR V
IN
≤ 5.5V, OR TIE V
INTERNAL
CONTROL
CONDITIONS
I
I
I
POWER
FILTER
T
OUT1
OUT1
OUT2
A
= 25°C. Use Figure 1 confi guration.
= 4A, I
= 4A
= 4A
IN
OUT2
AND EXTV
= 4A
M1
M2
M3
M4
CC
TOGETHER FOR V
L1
L2
IN
60.4k
60.4k
≤ 5.5V
1.5μF
10μF
1.5μF
10μF
4619 BD
MIN
10
+
+
+
R
28k
R
19.1k
TYP
200
200
SET1
SET2
C
C
C
IN
OUT1
OUT2
LTM4619
V
4.5V TO 26.5V*
PGND
SW1
V
2.5V/4A
PGND
V
PGND
SW2
V
3.3V/4A
PGND
V
IN
OUT1
FB1
OUT2
FB2
MAX
UNITS
7
4619f
μF
μF
μF