Typical operating characteristics, Electrical characteristics (continued) – Rainbow Electronics MAX783 User Manual
Page 4
MAX783
Triple-Output Power-Supply Controller
for Notebook Computers
4
_______________________________________________________________________________________
Note 1:
Output current is further limited by maximum allowable package power dissipation.
Note 2:
Because the reference uses VL as its supply, the REF line regulation error is insignificant.
Note 3:
The main switching outputs track the reference voltage. Loading the reference reduces the main outputs slightly according
to the closed-loop gain (AV
CL
) and the reference voltage load regulation error. AV
CL
for the +3.3V supply is unity gain.
AV
CL
for the +5V supply is 1.54.
MAX183 5
50
1m
60
100
10
80
70
10m
1
90
100m
EFFICIENCY (%)
+5V OUTPUT CURRENT (A)
EFFICIENCY vs.
+5V OUTPUT CURRENT
V+ = 15V
N1-N4 = IRF7101
ON3 = LOW
F = 200kHz
V+ = 6V
MAX183 6
50
1m
60
100
10
80
70
10m
1
90
100m
EFFICIENCY (%)
+3.3V OUTPUT CURRENT (A)
EFFICIENCY vs.
+3.3V OUTPUT CURRENT
V+ = 15V
N1-N4 = IRF7101
ON3 = ON5 = HIGH
F = 200kHz
V+ = 6V
500
0
0
5
20
MAXIMUM +15V VDD OUTPUT CURRENT vs.
SUPPLY VOLTAGE
100
200
SUPPLY VOLTAGE (V)
MAXIMUM +15V LOAD CURRENT (mA)
10
15
VDD
>
+13V
+3.3V REGULATING
+3.3V LOAD = 0A
+3.3V LOAD = 3A
300
400
QUIESCENT SUPPLY CURRENT vs.
SUPPLY VOLTAGE
QUIESCENT SUPPLY CURRENT (mA)
0
1
2
13
14
0
6
12
18
24
30
SUPPLY VOLTAGE (V)
ON3 = ON5 = HIGH
STANDBY SUPPLY CURRENT vs.
SUPPLY VOLTAGE
STANDBY SUPPLY CURRENT (mA)
0
0.5
1.0
1.5
2.0
2.5
0
6
12
18
24
30
ON3 = ON5 = 0V
SUPPLY VOLTAGE (V)
__________________________________________Typical Operating Characteristics
(Circuit of Figure 1, Transpower TTI5902 transformer, T
A
= +25°C, unless otherwise noted.)
PARAMETER
CONDITIONS
UNITS
DL3/DL5 Sink/Source Current
V
OUT
= 2V
1
A
DH3/DH5 Sink/Source Current
BST3-LX3 = BST5-LX5 = 4.5V, V
OUT
= 2V
1
A
DL3/DL5 On-Resistance
High or low
7
Ω
DH3/DH5 On-Resistance
High or low, BST3-LX3 = BST5-LX5 = 4.5V
7
Ω
MIN
TYP
MAX
ELECTRICAL CHARACTERISTICS (continued)
(V+ = 15V, GND = PGND = 0V, I
VL
= I
REF
= 0mA, S
—
H
—
D
—
N
–
= ON3 = ON5 = 5V, other digital input levels are 0V or +5V,
T
A
= T
MIN
to T
MAX
, unless otherwise noted.)