Rainbow Electronics MAX1813 - Manual (Page 11)

MAX1813
Dynamically-Adjustable, Synchronous Step-Down
Controller with Integrated Voltage Positioning
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200 µs/div
STARTUP WAVEFORM
(HEAVY LOAD)
1.6V
0
A
B
MAX1813 toc21
0
0
5V
20A
A. V SKP/SDN = 0 TO 1.6V, 2V/div
B. PGOOD, 5V/div
C. V
OUT = 1.4V, R OUT = 63m Ω, 1V/div
D. INDUCTOR CURRENT, 20A/div
0
1.4V
C
D
200 µs/div
STARTUP WAVEFORM
(NO LOAD, PWM MODE)
1.6V
0
A
B
MAX1813 toc22
0
0
5V
10A
A. V SKP/SDN = 0 TO 1.6V, 2V/div
B. PGOOD, 5V/div
C. V
OUT = 1.4V, NO LOAD, 1V/div
D. INDUCTOR CURRENT, 10A/div
0
1.4V
C
D
200 µs/div
STARTUP WAVEFORM
(NO LOAD, SKIP MODE)
5V
0
A
B
MAX1813 toc23
0
0
5V
10A
A. V SKP/SDN = 0 TO 5V
B. PGOOD, 5V/div
C. V
OUT = 1.4V, NO LOAD, 1V/div
D. INDUCTOR CURRENT, 10A/div
0
1.4V
C
D
40 µs/div
SHUTDOWN WAVEFORM
1.6V
0
A
B
MAX1813 toc24
1.4V
0
20A
A. V SKP/SDN = 0 TO 1.6V, 2V/div
B. PGOOD, 5V/div
C. V
OUT = 1.4V, R OUT = 63m Ω, 1V/div
D. INDUCTOR CURRENT, 20A/div
0
C
D
5V
Typical Operating Characteristics (continued)
(Circuit from Figure 1, components from Table 2, T
A
= +25 °C, unless otherwise noted.)