EL7531 查看數據表（PDF） - Intersil
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EL7531 Datasheet PDF : 11 Pages
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EL7531
Performance Curves and Waveforms (Continued)
All waveforms are taken at VIN = 3.3V, VO = 1.8V, IO = 1A with component values shown on page 1 at room ambient temperature, unless otherwise
noted.
VIN
(2V/DIV)
IIN
(0.5A/DIV)
VO
(2V/DIV)
PG
EN
IIN
(0.5A/DIV)
VO
(2V/DIV)
PG
200µs/DIV
FIGURE 13. START-UP AT IO = 1A
500µs/DIV
FIGURE 14. ENABLE AND SHUT-DOWN
LX
(2V/DIV)
IL
(0.5A/DIV)
∆VO
(50mV/DIV)
2µs/DIV
FIGURE 15. PFM STEADY-STATE OPERATION WAVEFORM
(IO = 100mA)
LX
(2V/DIV)
IL
(0.5A/DIV)
∆VO
(10mV/DIV)
0.5µs/DIV
FIGURE 16. PWM STEADY-STATE OPERATION (IO = 1A)
SYNC
(2V/DIV)
LX
(2V/DIV)
IL
(0.5A/DIV)
0.2µs/DIV
FIGURE 17. EXTERNAL SYNCHRONIZATION TO 2MHz
6
SYNC
(2V/DIV)
LX
(2V/DIV)
IL
(0.5A/DIV)
20ns/DIV
FIGURE 18. EXTERNAL SYNCHRONIZATION TO 12MHz
FN7428.9
July 13, 2006
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