XRP7708 Exar Corporation, XRP7708 Datasheet - Page 9

• Manufacturer Part Number: XRP7708
• Description: Quad Channel Digital Pwm Step Down Controller
• Manufacturer: Exar Corporation

© 2010 Exar Corporation
Fig. 12: Startup into 3V prebias – 5V Output
Fig. 10: Sequential Start-up Configuration
CH1:3.3V CH2:5V CH3:1V CH4:1.8V
CH1:Iout (1A/div) CH2: Vout (3.3V)
Fig. 14: Load Transient Response
CH1: Vout(5V)
Q
Q
u
u
a
a
d
d
C
C
h
h
a
a
n
n
9/27
n
n
e
e
l
l
D
D
i
i
g
g
Fig. 11: Sequential Soft-Stop Configuration
Fig. 13: Sequential Soft-Stop Configuration
i
i
t
CH1:5V CH2:3.3V CH3:1.8V CH4:1.2V
t
CH1:3.3V CH2:5V CH3:1V CH4:1.8V
a
a
Vout Shutdown = 0.8V, No Load
l
l
Vout Shutdown = 0.8V, 3A load
P
P
W
W
M
M
S
S
t
t
e
e
p
p
D
D
o
o
w
w
n
n
X
X
C
C
R
R
o
o
n
P
n
P
Rev. 1.0.3
t
t
7
7
r
r
o
7
o
7
l
l
0
0
l
l
e
e
8
8
r
r