Datasheet

7Maxim Integrated
High-Efficiency, 4A, Step-Down DC-DC
Regulators with Internal Power Switches
MAX15066/MAX15166
Typical Operating Characteristics (continued)
(V
IN
= 12V, V
OUT
= 1.8V, C
VDD
= 1FF, C
IN
= 22FF, C
OUT
= 47FF, T
A
= +25NC (Figure 1, MAX15066), unless otherwise noted.)
STARTUP INTO PREBIAS (NO LOAD)
MAX15066 toc23
V
OUT
1V/div
I
L
1V/div
I
LOAD
2A/div
V
EN
10V/div
0A
0A
0V
0V
400µs/div
SOFT-START TIME vs. CAPACITANCE
MAX15066 toc22
C
SS
(nF)
SOFT-START TIME (ms)
10010
1.0
10.0
100.0
1000.0
0.1
1 1000
SKIP MODE WAVEFORM
(MAX15066)
MAX15066 toc21
V
OUT
AC-COUPLED
20mV/div
V
LX
10V/div
I
LOAD
2A/div
0V
0A
40µs/div
SOFT-START WAVEFORM
MAX15066 toc20
I
L
2A/div
V
OUT
1V/div
V
PGOOD
5V/div
V
EN
10V/div
400µs/div
SWITCHING BEHAVIOR
(MAX15066)
MAX15066 toc19
V
LX
10V/div
V
OUT
AC-COUPLED
10mV/div
0V
0A
I
L
2A/div
1µs/div
OUTPUT SHORT-CIRCUIT WAVEFORM
MAX15066 toc18
V
OUT
2V/div
V
SS
1V/div
0V
0A
0V
I
IN
0.5A/div
0A
20ms/div
I
OUT
10A/div