Low-Cost, High-Frequency, Current-Mode PWM
Buck Controller
MAX1953/MAX1954/MAX1957
Typical Operating Characteristics (continued)
(T
A
= +25°C, unless otherwise noted.)
MAX1953
LOAD TRANSIENT
MAX1953 toc15
MAX1954
LOAD TRANSIENT
MAX1953 toc16
V
OUT
AC-COUPLED
100mV/div
V
OUT
AC-COUPLED
100mV/div
3A
I
LOAD
CIRCUIT OF FIGURE 1
400µs/div
400µs/div
1.5A
I
LOAD
5A
2.5A
MAX1957
LOAD TRANSIENT
MAX1953 toc17
MAX1953
NO-LOAD SWITCHING WAVEFORMS
MAX1953 toc18
V
OUT
AC-COUPLED
50mV/div
I
LX
2A/div
LX
3A
5V/div
DL
5V/div
I
LOAD
-3A
400µs/div
DH
5V/div
2µs/div
6
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