EL7640, EL7641, EL7642
Typical Performance Curves (Continued)
0
-0.05
-0.1
V
=20V
ON
BOOST OUTPUT
VOLTAGE
(AC COUPLING)
BOOST OUTPUT
CURRENT
-0.15
-0.2
V
=12V
BOOST
C
=30µF
OUT
-0.25
5
10
15
20
25
30
V
LOAD CURRENT (mA)
ON
FIGURE 7. BOOST PULSE LOAD TRANSIENT RESPONSE
FIGURE 8. V
LOAD REGULATION
ON
0
0
-0.1
V
=-8V
OFF
-0.02
-0.04
-0.06
-0.08
-0.2
-0.3
-0.4
-0.5
-0.6
-0.7
-0.8
-0.9
V
I
=20V
ON
-0.1
=20mA
LOAD
-0.12
20
21
22
23
24
25
26
5
10
15
20
25
30
INPUT VOLTAGE (V)
LOAD CURRENT (mA)
FIGURE 9. V
LINE REGULATION
FIGURE 10. V
LOAD REGULATION
OFF
ON
0
-0.1
-0.2
-0.3
-0.4
-0.5
-0.6
V
CDLY
V
BOOST
V
ON
V
=-8V
=50mA
OFF
V
C
=220nF
DEL
OFF
I
LOAD
-15
-14
-13
-12
-11
-10
TIME (20ms/DIV)
INPUT VOLTAGE (V)
FIGURE 11. V
LINE REGULATION
FIGURE 12. START-UP SEQUENCE
OFF
FN7415.1
September 26, 2005
8
INTERSIL [ Intersil ]
