EL7564C Elantec Semiconductor, EL7564C Datasheet - Page 12

• Manufacturer Part Number: EL7564C
• Description: Monolithic 4 Amp DC:DC Step-down Regulator
• Manufacturer: Elantec Semiconductor

EL7564C
Monolithic 4 Amp DC:DC Step-down Regulator
2. Offset Tracking
The intended start-up sequence is shown in Figure 3a. In
this configuration, V
preset value of:
V
R
IN
A
C
10
10
1
2
6
7
8
9
1
2
6
7
8
9
------------------- -
R
will not start until V
A
STP
STN
STP
STN
R
+
B
R
B
EL7564C
EL7564C
+
+
-
-
R
V
B
IN
20
19
15
14
13
12
11
20
19
15
14
13
12
11
Figure 3. Offset Power Tracking
P
reaches a
12
However, due to the superimpose of V
choice of R
relationship:
Where 0.5 is for noise immunity. See Figure 3 below.
V
V
C
P
V
A
P
and R
+
V
0.5
OUT
------------------- -
R
B
A
R
+
are restricted by the following
B
R
B
TIME
V
IN
+
------------------- -
R
A
R
+
A
R
B
V
V
C
V
P
C
C
and V
IN
, the