Typical operating characteristics (continued) – Rainbow Electronics MAX17480 User Manual
Page 13
MAX17480
AMD 2-/3-Output Mobile Serial
VID Controller
______________________________________________________________________________________
13
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
.)
STARTUP WAVEFORMS
MAX17480 toc16
200
µs/div
0
SHDN, 5V/div
V
OUT1
, 0.5V/div
V
OUT2
, 0.5V/div
V
OUT3
, 0.5V/div
PWRGD, 5V/div
I
LX
, 5A/div
I
LX3
, 1A/div
V
IN
= 12V
V
BOOT
= 1V
I
LOAD1
= 3A
I
LOAD2
= 3A
I
LOAD3
= 0.5A
0
0
0
0
5A
0
1A
0
STARTUP SEQUENCE
MAX17480 toc17
400
µs/div
0
SHDN, 5V/div
V
OUT1
, 0.5V/div
V
OUT2
, 0.5V/div
V
OUT3
, 0.5V/div
PWRGD, 5V/div
PGD_IN, 2.5V/div
SVC, 2.5V/div
SVD, 2.5V/div
V
IN
= 12V
V
BOOT
= 1V
V
SVID
= 1.2V
0
0
0
0
0
0
0
SHUTDOWN WAVEFORMS
MAX17480 toc18
100
µs/div
3.3V
1.2V
1.2V
1.2V
5V
5V
5V
5V
SHDN, 5V/div
V
OUT1
, 0.5V/div
V
OUT2
, 0.5V/div
V
OUT3
, 0.5V/div
DL1, 10V/div
DL2, 10V/div
LX3, 10V/div
PWRGD, 10V/div
V
IN
= 12V
I
LOAD1
= 3A
V
SVID
= 1.2V
I
LOAD2
= 3A
I
LOAD3
= 0.5A
CORE SMPS 1-PHASE LOAD-TRANSIENT
RESPONSE
MAX17480 toc19
20
µs/div
1.2V
1.5A
13.5A
12V
0
V
OUT1
, 50mV/div
I
LX1
, 10A/div
LX1, 10V/div
V
IN
= 12V
I
LOAD1
= 1.5A TO 13.5A TO 1.5A
V
OUT1
= 1.2V
PWM MODE