Typical operating characteristics – Rainbow Electronics MAX17480 User Manual
Page 11
MAX17480
AMD 2-/3-Output Mobile Serial
VID Controller
______________________________________________________________________________________
11
Typical Operating Characteristics
(
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 1-PHASE EFFICIENCY
vs. LOAD CURRENT (V
OUT
= 1.2V)
MAX17480 toc01
LOAD CURRENT (A)
EFFICIENCY (%)
10
1
70
80
90
100
60
0.1
100
SKIP MODE
PWM MODE
12V
7V
20V
CORE SMPS 2-PHASE EFFICIENCY
vs. LOAD CURRENT (V
OUT
= 1.2V)
MAX17480 toc02
LOAD CURRENT (A)
EFFICIENCY (%)
10
70
80
90
100
60
1
100
12V
7V
20V
PWM MODE
CORE SMPS OUTPUT VOLTAGE
vs. LOAD CURRENT (V
OUT
= 1.2V)
MAX17480 toc03
LOAD CURRENT (A)
OUTPUT VOLTAGE (V)
15
10
5
1.195
1.200
1.205
1.190
0
20
SKIP MODE AND PWM MODE
V
IN
= 12V
CORE SMPS 1-PHASE EFFICIENCY
vs. LOAD CURRENT (V
OUT
= 0.8V)
MAX17480 toc04
LOAD CURRENT (A)
EFFICIENCY (%)
10
1
70
80
90
100
60
0.1
100
SKIP MODE
PWM MODE
12V
7V
20V
CORE SMPS OUTPUT VOLTAGE
vs. LOAD CURRENT (V
OUT
= 0.8V)
MAX17480 toc05
LOAD CURRENT (A)
OUTPUT VOLTAGE (V)
15
10
5
0.795
0.800
0.805
0.790
0
20
SKIP MODE AND PWM MODE
V
IN
= 12V
NB SMPS EFFICIENCY
vs. LOAD CURRENT (1V)
MAX17480 toc06
LOAD CURRENT (A)
EFFICIENCY (%)
1
70
80
90
100
60
0.1
10
SKIP MODE
PWM MODE
3.3V
5V
NB SMPS 1V OUTPUT VOLTAGE
vs. LOAD CURRENT
MAX17480 toc07
LOAD CURRENT (A)
OUTPUT VOLTAGE (V)
2
1
0.97
0.99
1.01
1.03
1.05
0.95
0
4
3
SKIP MODE
PWM MODE
V
IN
= 3.3V
V
IN
= 5V
CORE SMPS 1-PHASE SWITCHING
FREQUENCY vs. LOAD CURRENT
MAX17480 toc08
LOAD CURRENT (A)
SWITCHING FREQUENCY (kHz)
10
1
150
200
250
300
350
100
0.1
100
V
IN
= 20V SKIP
V
IN
= 20V PWM
V
IN
= 12V SKIP
V
IN
= 12V PWM
V
IN
= 7V SKIP
V
IN
= 7V PWM
V
OUT
= 1.2V
NB SMPS SWITCHING FREQUENCY
vs. LOAD CURRENT
MAX17480 toc09
LOAD CURRENT (A)
SWITCHING FREQUENCY (kHz)
3.0
3.5
2.5
2.0
0.5
1.0
1.5
450
500
550
600
650
700
750
400
0
4.0
V
IN
= 3.3V SKIP
V
IN
= 5V PWM
V
IN
= 3.3V SKIP
V
IN
= 5V PWM
V
OUT
= 1V