Datasheet

MAX1533A/MAX1537A
High-Efficiency, 5x Output, Main Power-Supply
Controllers for Notebook Computers
_______________________________________________________________________________________ 9
PWM5 EFFICIENCY vs. LOAD CURRENT
(V
OUT5
= 5.0V)
MAX1533 toc01
LOAD CURRENT (A)
EFFICIENCY (%)
10.1
60
70
80
90
100
50
0.01 10
V
IN
= 20V
V
IN
= 12V
V
IN
= 7V
SKIP = GND
SKIP = V
CC
5V OUTPUT VOLTAGE (OUT5)
vs. LOAD CURRENT
MAX1533/37 toc02
LOAD CURRENT (A)
OUTPUT VOLTAGE (V)
45231
4.96
5.00
5.04
5.08
5.12
4.88
4.92
06
SKIP = GND
SKIP = V
CC
5V OUTPUT VOLTAGE (OUT5)
vs. INPUT VOLTAGE
MAX1533/37 toc03
INPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
2515 2010
4.96
5.00
5.04
5.08
5.12
4.88
4.92
530
SKIP = GND
SKIP = V
CC
NO LOAD
PWM3 EFFICIENCY vs. LOAD CURRENT
(V
OUT3
= 3.3V)
MAX1533/37 toc04
LOAD CURRENT (A)
EFFICIENCY (%)
10.1
60
70
80
90
100
50
0.01 10
V
IN
= 20V
V
IN
= 12V
V
IN
= 5V
SKIP = GND
SKIP = V
CC
3.3V OUTPUT VOLTAGE (OUT3)
vs. LOAD CURRENT
MAX1533/37 toc05
LOAD CURRENT (A)
OUTPUT VOLTAGE (V)
45231
3.27
3.30
3.33
3.36
3.39
3.21
3.24
06
SKIP = GND
SKIP = V
CC
3.3V OUTPUT VOLTAGE (OUT3)
vs. INPUT VOLTAGE
MAX1533/37 toc06
INPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
2515 2010
3.27
3.30
3.33
3.36
3.39
3.21
3.24
530
SKIP = GND
SKIP = V
CC
NO LOAD
NO-LOAD SUPPLY CURRENT
vs. INPUT VOLTAGE (FULLY ENABLED)
MAX1533/37 toc07
INPUT VOLTAGE (V)
SUPPLY CURRENT (mA)
2515 2010
16
20
24
28
32
0
12
8
4
05 30
SKIP = GND
SKIP = V
CC
ON3 = ON5 = V
CC
0.22mA (V
IN
= 12V)
NO-LOAD SUPPLY CURRENT
vs. INPUT VOLTAGE (STANDBY MODE)
MAX1533/37 toc08
INPUT VOLTAGE (V)
STANDBY SUPPLY CURRENT (mA)
2515 2010
0.4
0.5
0.6
0.7
0.8
0.9
1.0
0
0.3
0.2
0.1
05 30
ON3 = ON5 = GND
SHUTDOWN SUPPLY CURRENT
vs. INPUT VOLTAGE
MAX1533/37 toc09
INPUT VOLTAGE (V)
SHUTDOWN SUPPLY CURRENT (μA)
2515 2010
2
4
6
8
10
0
05 30
SHDN = GND
Typical Operating Characteristics
(MAX1537A circuit of Figure 1, V
IN
= 12V, LDO5 = V
CC
= 5V, SKIP = GND, FSEL = REF, T
A
= +25°C, unless otherwise noted.)