Typical operating characteristics – Rainbow Electronics MAX8760 User Manual
Page 9
MAX8760
Dual-Phase, Quick-PWM Controller for AMD
Mobile Turion 64 CPU Core Power Supplies
_______________________________________________________________________________________
9
OUTPUT VOLTAGE vs. LOAD CURRENT
(V
OUT
= 1.30V)
MAX8760 toc01
LOAD CURRENT (A)
OUTPUT VOLTAGE (V)
30
20
10
1.20
1.22
1.24
1.26
1.28
1.30
1.32
1.18
0
40
V
IN
= 12V
SKIP = V
CC
OR REF
EFFICIENCY vs. LOAD CURRENT
(V
OUT
= 1.30V)
MAX8760 toc02
LOAD CURRENT (A)
EFFICIENCY (%)
10
1
60
70
80
90
100
50
0.01
100
V
IN
= 7V
V
IN
= 12V
V
IN
= 20V
SKIP = REF
SKIP = V
CC
OUTPUT VOLTAGE vs. LOAD CURRENT
(V
OUT
= 1.00V)
MAX8760 toc03
LOAD CURRENT (A)
OUTPUT VOLTAGE (V)
30
20
10
0.90
0.92
0.94
0.96
0.98
1.00
1.02
1.04
0.88
0
40
V
IN
= 12V
SKIP = V
CC
OR REF
EFFICIENCY vs. LOAD CURRENT
(V
OUT
= 1.00V)
MAX8760 toc04
LOAD CURRENT (A)
EFFICIENCY (%)
10
1
60
70
80
90
100
50
0.01
100
V
IN
= 7V
V
IN
= 12V
V
IN
= 20V
SKIP = REF
SKIP = V
CC
OUTPUT VOLTAGE vs. LOAD CURRENT
(V
OUT
= 0.80V)
MAX8760 toc05
LOAD CURRENT (A)
OUTPUT VOLTAGE (V)
15
10
5
0.76
0.78
0.80
0.82
0.84
0.74
0
20
V
IN
= 12V
SKIP = REF or GND
EFFICIENCY vs. LOAD CURRENT
(V
OUT
= 0.80V)
MAX8760 toc06
LOAD CURRENT (A)
EFFICIENCY (%)
10
1
60
70
80
90
100
50
0.01
100
V
IN
= 7V
V
IN
= 20V
SKIP = REF
SKIP = GND
SWITCHING FREQUENCY
vs. LOAD CURRENT
MAX8760 toc07
LOAD CURRENT (A)
SWITCHING FREQUENCY (kHz)
30
10
20
100
200
300
400
0
0
40
V
OUT
= 1V (NO LOAD)
SKIP MODE (SKIP = REF)
FORCED-PWM (SKIP = V
CC
)
NO-LOAD SUPPLY CURRENT
vs. INPUT VOLTAGE (FORCED-PWM MODE)
MAX8760 toc08
INPUT VOLTAGE (V)
SUPPLY CURRENT (mA)
20
25
5
15
10
30
60
90
120
150
0
0
30
I
IN
SKIP = V
CC
I
CC
+ I
DD
NO-LOAD SUPPLY CURRENT
vs. INPUT VOLTAGE (PULSE SKIPPING)
MAX8760 toc09
INPUT VOLTAGE (V)
SUPPLY CURRENT (mA)
20
25
5
15
10
0.5
1.0
1.5
2.0
2.5
3.0
0
0
30
I
IN
SKIP = REF
I
CC
+ I
DD
Typical Operating Characteristics
(Circuit of Figure 1, V
IN
= 12V, V
CC
= V
DD
= 5V, SHDN = SKIP = V
CC
, D0–D5 set for 1.5V (SUS = GND), S0 and S1 set for 1V
(SUS = V
CC
), OFS = GND, T
A
= +25°C, unless otherwise specified.)