Triple-Output Power-Supply
Controller for Notebook Computers
MAX782
__________________________________________Typical Operating Characteristics
(Circuit of Figure 1, Transpower transformer type TTI5870, T
A
= +25°C, unless otherwise noted.)
EFFICIENCY vs.
+5V OUTPUT CURRENT, 200kHz
100
V
IN
= 10V
EFFICIENCY (%)
EFFICIENCY (%)
90
V
IN
= 15V
90
V
IN
= 6V
100
EFFICIENCY vs.
+5V OUTPUT CURRENT, 300kHz
I
DD
= 0mA
+3.3V OFF
I
DD
OUTPUT CURRENT vs. INPUT VOLTAGE
COILTRONIX CTX03-12062 TRANSFORMER
10
+3V LOAD = 0mA
R
SENSE
= 0.020Ω
V
IN
= 6V
I
DD
LOAD CURRENT (A)
1
+5V LOAD = 0A-1A
V
IN
= 15V
V
IN
= 30V
+5V LOAD = 3A
0.1
80
COMPONENTS,
OF TABLE 5. SYNC = 0V,
+3.3V OFF, I
DD
= 0mA
0.01
0.1
1
10
80
70
0.001
70
0.001
0.01
0.01
0.1
1
10
5
10
15
20
25
30
+5V OUTPUT CURRENT (A)
INPUT VOLTAGE (V)
+5V OUTPUT CURRENT (A)
EFFICIENCY vs.
+3.3V OUTPUT CURRENT, 200kHz
100
+5V ON, +5V LOAD = 0mA
I
DD
= 0mA,
COMPONENTS OF TABLE 5
EFFICIENCY (%)
EFFICIENCY (%)
90
V
IN
= 6V
V
IN
= 10V
V
IN
= 15V
90
100
EFFICIENCY vs.
+3.3V OUTPUT CURRENT, 300kHz
I
DD
= 0mA
+5V ON
+5V LOAD = 0mA
10000
V
IN
= 6V
INPUT CURRENT (µA)
1000
QUIESCENT INPUT CURRENT vs.
INPUT VOLTAGE
+3.3V LOAD = +5V LOAD = 0mA
V
IN
= 15V
V
IN
= 30V
80
+5V, +3V ON
80
100
+5V, +3V OFF
70
0.001
0.01
0.1
1
10
70
0.001
10
0.01
0.1
1
10
0
5
10
15
20
25
30
+3.3V OUTPUT CURRENT (A)
INPUT VOLTAGE (V)
+3.3V OUTPUT CURRENT (A)
+5V OUTPUT CURRENT vs.
MINIMUM INPUT VOLTAGE, 300kHz
9
MINIMUM INPUT VOLTAGE (V)
I
DD
= 300mA
8
MINIMUM INPUT VOLTAGE (V)
9
+5V OUTPUT CURRENT vs.
MINIMUM INPUT VOLTAGE, 200kHz
COMPONENTS OF TABLE 4,
SYNC = 0V
I
DD
= 300mA
1000
SWITCHING FREQUENCY (kHz)
SWITCHING FREQUENCY vs.
LOAD CURRENT
CIRCUIT OF FIGURE 1,
SYNC = REF (300kHz)
ON3 = ON5 = 5V
+5V, V
IN
= 7.5V
8
100
7
I
DD
= 140mA
7
I
DD
= 140mA
10
+5V, V
IN
= 30V
6
I
DD
= 60mA
I
DD
= 0mA
6
I
DD
= 60mA
I
DD
= 0mA
1
+3.3V, V
IN
= 7.5V
5
0.01
5
0.1
1
10
0.01
0.1
1
10
+5V OUTPUT CURRENT (A)
+5V LOAD CURRENT (A)
0.1
100µA
1mA
10mA
100mA
1A
LOAD CURRENT
4
_______________________________________________________________________________________
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
