Typical operating characteristics – Rainbow Electronics MAX17000 User Manual
Page 8
MAX17000
Complete DDR2 and DDR3 Memory
Power-Management Solution
8
_______________________________________________________________________________________
Typical Operating Characteristics
(MAX17000 Circuit of Figure 1, V
IN
= 12V, V
DD
= V
CC
= 5V, SKIP = GND, T
A
= +25°C, unless otherwise noted.)
SMPS 1.8V EFFICIENCY
vs. LOAD CURRENT
MAX17000 toc01
LOAD CURRENT (A)
EFFICIENCY (%)
1
0.1
20
30
40
50
60
70
80
90
100
10
0.01
10
STANDBY MODE
PWM MODE
V
IN
= 7V
SKIP MODE
SMPS 1.8V EFFICIENCY
vs. LOAD CURRENT
MAX17000 toc02
LOAD CURRENT (A)
EFFICIENCY (%)
1
0.1
20
30
40
50
60
70
80
90
100
10
0.01
10
STANDBY MODE
PWM MODE
V
IN
= 12V
SKIP MODE
SMPS 1.8V EFFICIENCY
vs. LOAD CURRENT
MAX17000 toc03
LOAD CURRENT (A)
EFFICIENCY (%)
1
0.1
20
30
40
50
60
70
80
90
100
10
0.01
10
STANDBY MODE
PWM MODE
V
IN
= 20V
SKIP MODE
SMPS 1.8V OUTPUT VOLTAGE
vs. LOAD CURRENT
MAX17000 toc04
LOAD CURRENT (A)
OUTPUT VOLTAGE (V)
0.1
1
0.01
1.79
1.80
1.81
1.82
1.78
0.001
10
PWM MODE
V
IN
= 12V
SKIP MODE
SMPS SWITCHING FREQUENCY
vs. LOAD CURRENT
MAX17000 toc05
LOAD CURRENT (A)
SWITCHING FREQUENCY (kHz)
4
6
8
2
100
50
200
150
300
250
350
0
0
10
V
IN
= 12V
V
OUT
= 1.8V
SMPS VALLEY-CURRENT LIMIT
vs. INPUT VOLTAGE
MAX17000 toc06
INPUT VOLTAGE (V)
CURRENT LIMIT (A)
12
16
20
24
8
9.75
10.00
10.25
10.50
9.50
4
28
R
SENSE
= 2m
Ω
NO-LOAD SUPPLY CURRENT
vs. INPUT VOLTAGE
MAX17000 toc07
INPUT VOLTAGE (V)
SUPPLY CURRENT (mA)
12
16
20
24
8
0.1
1
10
100
0.01
4
28
PWM MODE, I
CC
+ I
DD
SKIP MODE, I
CC
+ I
DD
SKIP MODE, I
IN
STANDBY MODE, I
CC
+ I
DD
STANDBY MODE, I
IN
PWM MODE, I
IN
NO LOAD
PRESET 1.5V OUTPUT
VOLTAGE DISTRIBUTION
MAX17000 toc08
OUTPUT VOLTAGE (V)
SAMPLE PERCENTAGE (%)
1.500
1.505
1.495
10
20
30
40
50
0
1.490
1.510
SAMPLE SIZE = 150
+85
°C
+25
°C