Typical operating characteristics (continued) – Rainbow Electronics MAX1545 User Manual
Page 13
Typical Operating Characteristics (continued)
(Circuit of Figure 1, V
IN
= 12V, V
CC
= V
DD
= 5V, SHDN = SKIP = V
CC
, D0–D4 set for 1.5V (SUS = GND), S0–S1 set
for 1V (SUS = V
CC
), OFS = GND, T
A
= +25°C, unless otherwise specified.)
MAX1519/MAX1545
Dual-Phase, Quick-PWM Controllers for
Programmable CPU Core Power Supplies
______________________________________________________________________________________
13
DUAL-PHASE SKIP TO DUAL-PHASE
PWM TRANSITION
MAX1519 toc27
5V
2V
0A
0A
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
100mV DAC CODE TRANSITION
MAX1519 toc28
3.3V
0V
5A
5A
1.5V
1.4V
B
C
D
A
20
µs/div
A. D1, 5V/div
B. V
OUT
= 1.50V TO 1.40V, 100mV/div
C. I
L1
, 10A/div
D. I
L2
, 10A/div
10A LOAD
400mV DAC CODE TRANSITION
MAX1519 toc29
3.3V
0V
1.5V
1.1V
5A
5A
B
C
D
A
40
µs/div
A. D3, 5V/div
B. V
OUT
= 1.50V TO 1.10V, 0.5V/div
C. I
L1
, 10A/div
D. I
L2
, 10A/div
10A LOAD
SINGLE-PHASE SKIP TO DUAL-PHASE
PWM TRANSITION
MAX1519 toc26
5V
0A
0A
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