Linear Technology EN55022B, Руководство пользователя

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LTM4612
9
4612fc
For more information www.linear.com/LTM4612
BLOCK DIAGRAM
DECOUPLING REQUIREMENTS
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
C
IN
External Input Capacitor Requirement
(V
IN
= 20V to 36V, V
OUT
= 12V)
I
OUT
= 4A 20 µF
C
OUT
External Output Capacitor Requirement
(V
IN
= 20V to 36V, V
OUT
= 12V)
I
OUT
= 4A 100 150 µF
Specifications are at T
A
= 25°C. Use Figure 1 configuration.
+
INTERNAL
COMP
SGND
COMP
PGOOD
RUN
> 1.9V = ON
< 1V = OFF
MAX = 5V
MARG1
MARG0
MPGM
FCB
PLLIN
C
SS
INTV
CC
DRV
CC
TRACK/SS
V
FB
f
SET
50k
93.1k
R
FB
5.23k
50k
100k
V
OUT
5.1V
ZENER
POWER CONTROL M1
V
IN
20V TO 36V
V
D
V
OUT
12V
AT 4A
M2
50k
10µF
1µF
C
IN
+
C
OUT
PGND
4612 F01
C
D
10k
4.7µF
INPUT
FILTER
2.7µH
NOISE
CANCEL-
LATION
Figure 1. Simplified Block Diagram