Typical operating characteristics (continued) – Rainbow Electronics MAX17480 User Manual
Page 15
Typical Operating Characteristics (continued)
(
Circuit of Figure 2, V
IN
= 12V, V
DD
= V
CC
= 5V, V
DDIO
= 2.5V, T
A
= +25
°C, unless otherwise noted
.)
CORE SMPS OUTPUT OVERLOAD
WAVEFORM (SEPARATE MODE)
MAX17480 toc24
100
µs/div
1.2V
1.2V
1.2V
5V
5V
5V
5V
0
0
0
V
IN
= 12V
I
LOAD1
= 3A TO 40A
V
SVID
= 1.2V
I
LOAD2
= 3A
I
LOAD3
= 0.5A
SHDN, 5V/div
V
OUT1
, 1V/div
DL1, 10V/div
V
OUT2
, 1V/div
V
OUT3
, 1V/div
DL2, 10V/div
LX3, 10V/div
CORE SMPS OUTPUT OVERVOLTAGE
WAVEFORM (SEPARATE MODE)
MAX17480 toc25
100
µs/div
1.2V
1.2V
1.2V
5V
5V
5V
0
0
0
V
IN
= 12V
I
LOAD1
= NO LOAD
V
SVID
= 1.2V
I
LOAD2
= 3A
I
LOAD3
= 0.5A
SHDN, 5V/div
V
OUT1
, 1V/div
DL1, 10V/div
V
OUT2
, 1V/div
V
OUT3
, 1V/div
DL2, 10V/div
LX3, 10V/div
DYNAMIC OUTPUT-VOLTAGE
TRANSITIONS (LIGHT LOAD)
MAX17480 toc26
100
µs/div
0.6V
0.6V
0.6V
1.3V
1.3V
2.5V
2.5V
1.3V
V
IN
= 12V
V
SVID
= 1.3V TO 0.6V TO 1.3V
V
OUT1
, 0.5V/div
V
OUT2
, 0.5V/div
V
OUT3
, 0.5V/div
SVC, 2.5V/div
SVD, 2.5V/div
PGD_IN TRANSITION (LIGHT LOAD)
MAX17480 toc27
10
µ
s/div
0.8V
0
0
1.1V
1.1V
1.2V
5V
5V
0
0
0
0.9V
V
IN
= 12V
V
BOOT
= 1.1V
V
OUT1
= 0.8V
V
OUT2
= 1.2V
V
OUT3
= 0.9V
V
OUT
, 200mV/div,
V
OUT2
, 200mV/div
LX1, 20V/div
LX2, 20V/div
LX3, 5V/div
V
OUT3
, 200mV/div
PWRGD, 5V/div
PGD_IN, 5V/div
MAX17480
AMD 2-/3-Output Mobile Serial
VID Controller
______________________________________________________________________________________
15