Rainbow Electronics MAX1847 - Manual (Page 7)

MAX1846/MAX1847
High-Efficiency, Current-Mode,
Inverting PWM Controller
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I L
0
5V/div
1A/div
5V/div
V OUT
ENTERING SHUTDOWN
MAX1846/7 toc16
APPLICATION CIRCUIT B
1ms/div
SHDN
I L
LX
1A/div
10V/div
100mV/div
V OUT
HEAVY-LOAD SWITCHING
WAVEFORM
MAX1846/7 toc17
APPLICATION CIRCUIT B
1 µs/div
I LOAD = 600mA
I L
LX
1A/div
10V/div
100mV/div
V OUT
LIGHT-LOAD SWITCHING
WAVEFORM
MAX1846/7 toc18
APPLICATION CIRCUIT B
1 µs/div
I LOAD = 50mA
I L 1A/div
500mV/div
I LOAD
V OUT
LOAD-TRANSIENT RESPONSE
MAX1846/7 toc19
APPLICATION CIRCUIT B
2ms/div
I LOAD = 10mA to 400mA
I L 500mA/div
200mV/div
I LOAD
V OUT
LOAD-TRANSIENT RESPONSE
MAX1846/7 toc20
APPLICATION CIRCUIT C
400 µs/div
I LOAD = 4mA to 100mA
Typical Operating Characteristics (continued)
(Circuit references are from Table 1 in the Main Application Circuits section, C VL = 0.47µF, C REF = 0.1µF, T A = +25°C, unless otherwise
noted.)