Typical operating characteristics (continued) – Rainbow Electronics MAX783 User Manual
Page 5
MAX783
Triple-Output Power-Supply Controller
for Notebook Computers
_______________________________________________________________________________________
5
MINIMUM VIN TO VOUT DIFFERENTIAL
vs. +5V OUTPUT CURRENT
MINIMUM V
IN
TO V
OUT
DIFFERENTIAL (V)
+5V OUTPUT CURRENT (A)
0
0.2
0.4
0.6
0.8
1.0
1m
10m
100m
1
10
300kHz
200kHz
+5V OUTPUT
STILL REGULATING
1000
0.1
100
µ
10m
1
SWITCHING FREQUENCY vs.
LOAD CURRENT
10
LOAD CURRENT (A)
SWITCHING FREQUENCY (kHz)
100
1m
100m
SYNC = REF (300kHz)
ON3 = ON5 = HIGH
+5V, V
IN
= 7.5V
1
+5V, V
IN
= 30V
+3.3V, V
IN
= 7.5V
____________________________Typical Operating Characteristics (continued)
(Circuit of Figure 1, Transpower TTI5902 transformer, T
A
= +25°C, unless otherwise noted.)
SHUTDOWN SUPPLY CURRENT vs.
SUPPLY VOLTAGE
SHUTDOWN SUPPLY CURRENT (
µ
A)
0
100
200
300
400
500
0
6
12
18
24
30
SUPPLY VOLTAGE (V)
SHDN = 0V
I
LOAD
= 1A
V
IN
= 16V
PULSE-WIDTH MODULATION MODE WAVEFORMS
LX VOLTAGE
10V/div
+5V OUTPUT
VOLTAGE
50mV/div
500ns/div
I
LOAD
= 100mA
V
IN
= 10V
IDLE-MODE WAVEFORMS
+5V OUTPUT
50mV/div
2V/div
200
µ
s/div