Rainbow Electronics MAX8548 - Manual (Page 6)

MAX8545/MAX8546/MAX8548
Low-Cost, Wide Input Range, Step-Down
Controllers with Foldback Current Limit
6 _______________________________________________________________________________________
Typical Operating Characteristics (continued)
(V IN = V L = V CC = 5V, typical values are at T A = +25°C, unless otherwise noted.)
V
OUT
1V/div
V IN
5V/div
INDUCTOR
CURRENT
5A/div
1ms/div
START-UP WAVEFORM
MAX8545 toc15
I LOAD = 3A
V OUT
1V/div
V IN
5V/div
INDUCTOR
CURRENT
2A/div
2ms/div
SHUTDOWN WAVEFORM
MAX8545 toc16
I LOAD = 3A
V OUT
2V/div
V IN
5V/div
I
IN
10A/div
I OUT
5A/div
SHORT-CIRCUIT WAVEFORM
MAX8545 toc18
V OUT
2V/div
V IN
20V/div
I
IN
2A/div
INDUCTOR
CURRENT
5A/div
1ms/div
0
0
0
0
SHORT-CIRCUIT WAVEFORM
MAX8545 toc17
GAIN AND PHASE vs. FREQUENCY
MAX8545/46/48 toc19
FREQUENCY (kHz)
GAIN (dB)
PHASE (DEGREES)
10 1
-120
-100
-80
-60
-40
-20
0
20
40
60
-140
0.1 100
180
150
120
90
60
30
V IN = 17V, V OUT = 2.5V
I LOAD = 6A
GAIN
PHASE