Dual-Output Power-Supply
Controller for Notebook Computers
_________________________________Typical Operating Characteristics (continued)
(Circuit of Figure 1, T
A
= +25°C, unless otherwise noted.)
IDLE MODE WAVEFORMS
PULSE-WIDTH MODULATION MODE WAVEFORMS
MAX786
+5V OUTPUT
50mV/div
LX 10V/div
2V/div
+5V OUTPUT
50mV/div
200µs/div
I
LOAD
= 100mA
V
IN
= 10V
500ns/div
+5V OUTPUT CURRENT = 1A
V
IN
= 16V
+5V LOAD-TRANSIENT RESPONSE
+3.3V LOAD-TRANSIENT RESPONSE
3A
0A
LOAD CURRENT
3A
0A
LOAD CURRENT
+5V OUTPUT
50mV/div
+3.3V OUTPUT
50mV/div
200µs/div
V
IN
= 15V
200µs/div
V
IN
= 15V
_______________________________________________________________________________________
5