EL7563 INTERSIL [Intersil Corporation], EL7563 Datasheet - Page 13

• Manufacturer Part Number: EL7563
• Description: Monolithic 4 Amp DC:DC Step-Down Regulator
• Manufacturer: INTERSIL [Intersil Corporation]

The second way of offset tracking is to use the EN and
Power Good pins, as shown in Figure 25. In this
configuration, V
P
does not have to be larger than V
10
10
1
2
3
5
6
7
8
9
1
2
3
5
6
7
8
9
13
EL7563
EL7563
V
IN
PG
PG
EN
EN
20
19
18
16
15
14
13
12
11
20
19
18
16
15
14
13
12
11
R
C
FIGURE 26. EXTERNAL SOFT START
FIGURE 25. OFFSET TRACKING
C
10
1
2
6
7
8
9
.
STP
STN
EL7563
EL7563
+
-
V
V
C
P
20
19
15
14
13
12
11
3. External Soft Start
An external soft start can be combined with auxiliary supply
tracking to provide desired soft start other than internally
preset soft start (Figure 26). The appropriate start-up time is:
t
s
=
R
×
C
×
---------
V
V
IN
O
V
OUT
TIME
V
V
P
C
May 13, 2005
FN7296.2