Rainbow Electronics MAX17409 - Manual (Page 9)

MAX17409
1-Phase Quick-PWM GPU Controller
_______________________________________________________________________________________ 9
Gm (IMON) TRANSCONDUCTANCE
DISTRIBUTION
MAX17409 toc07
TRANSCONDUCTANCE (mS)
SAMPLE PERCENTAGE (%)
90
80
70
60
50
40
30
10
20
100
0
SAMPLE SIZE = 100 +85 °C
+25 °C
4.92 4.94 4.96 4.98 5.00 5.02 5.04 5.06 5.08 5.10 4.90
SOFT-START WAVEFORM
MAX17409 toc08
1ms/div
A. SHDN, 5V/div
B. I
LX , 10A/div
C. V OUT , 500mV/div
0
0
0
0
0
E
D
C
B
A
5V
0.95V
D. PWRGD, 5V/div
E. DL, 5V/div
I
OUT = 0A, SKIP MODE
SOFT-SHUTDOWN WAVEFORM
MAX17409 toc09
100 µs/div
A. SHDN, 5V/div
B. I
LX , 10A/div
C. V OUT , 500mV/div
0
0
0
0
0
E
D
C
B
A
5V
0.95V
D. PWRGD, 5V/div
E. DL, 5V/div
I
OUT = 0A, SKIP MODE
LOAD-TRANSIENT RESPONSE
(PWM MODE)
MAX17409 toc10
20 µs/div
A. V
OUT
, 50mV/div
B. I LX , 20A/div
1A
0
C
B
A 0.95V
C. LX, 10V/div
I
OUT = 1A - 11A
LOAD-TRANSIENT RESPONSE
(SKIP MODE)
MAX17409 toc11
20 µs/div
A. V
OUT
, 50mV/div
B. I LX , 20A/div
1A
0
C
B
A 0.95V
C. LX, 10V/div
I
OUT = 1A - 11A
Typical Operating Characteristics (continued)
(Circuit of Figure 1, V IN = 12V, V CC = V DD = 5V, SHDN = V CC , G0–G5 set for 1.05V (G0–G5 = 100110), T A = +25 °C, unless other-
wise specified.)