el7520a Intersil Corporation, el7520a Datasheet - Page 6

• Manufacturer Part Number: el7520a
• Description: 4-channel Dc/dc Controller
• Manufacturer: Intersil Corporation

Typical Performance Curves
V
V
BOOST
LOGIC
V
V
V
V
LOGIC
OFF
V
FIGURE 13. EL7520A START-UP SEQUENCE
FIGURE 15. EL7520A START-UP SEQUENCE
CDLY
ON
REF
EN
TIME (20ms/DIV)
TIME (20ms/DIV)
6
FIGURE 17. LX WAVEFORM-DISCONTINUOUS MODE
C
DLY
(Continued)
=0.1µF
C
DLY
=0.1µF
EL7520, EL7520A
0.5µs/DIV
V
BOOST-DELAY
V
V
BOOST
V
LOGIC
V
CDLY
V
REF
FIGURE 14. EL7520A START-UP SEQUENCE
FIGURE 16. EL7520A START-UP SEQUENCE
LOGIC
V
V
OFF
ON
TIME (20ms/DIV)
TIME (20ms/DIV)
C
DLY
C
DLY
=0.1µF
=0.1µF
July 12, 2005
FN7318.0