Typical operating characteristics (continued) – Rainbow Electronics MAX8760 User Manual
Page 12
MAX8760
Dual-Phase, Quick-PWM Controller for AMD
Mobile Turion 64 CPU Core Power Supplies
12
______________________________________________________________________________________
Typical Operating Characteristics (continued)
(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.)
SUSPEND TRANSITION
(DUAL-PHASE PWM OPERATION)
MAX8760 toc22
3.3V
2.5A
2.5A
0
1.5V
1.0V
B
C
D
A
40
µs/div
A. SUS, 5V/div
B. V
OUT
= 1.5V TO 1.0V, 0.5V/div
C. I
L1
, 10A/div
D. I
L2
, 10A/div
5A LOAD, SKIP = V
CC
, R
TIME
= 64.9k
Ω
SUSPEND TRANSITION
(SINGLE-PHASE SKIP OPERATION)
MAX8760 toc23
3.3V
0
10A
0
10A
0
1.5V
1.0V
B
C
D
A
100
µs/div
A. SUS, 5V/div
B. V
OUT
= 1.5V TO 1.0V, 0.5V/div
C. I
L1
, 10A/div
D. I
L2
, 10A/div
5A LOAD, C
OUT
= (4) 680
µF, SKIP = SUS, R
TIME
= 64.9k
Ω
SINGLE-PHASE SKIP TO DUAL-PHASE
PWM TRANSITION
MAX8760 toc24
5V
0
0
1.5V
B
C
D
A
20
µs/div
A. SKIP = V
CC
TO GND, 5V/div
B. 1.5V OUTPUT, 50mV/div
C. I
L1
, 10A/div
D. I
L2
, 10A/div
2A LOAD
DUAL-PHASE SKIP TO DUAL-PHASE
PWM TRANSITION
MAX8760 toc25
5V
2V
0
0
1.5V
B
C
D
A
20
µs/div
A. SKIP = V
CC
TO REF, 5V/div
B. 1.5V OUTPUT, 50mV/div
C. I
L1
, 10A/div
D. I
L2
, 10A/div
2A LOAD