Datasheet

MAX5088/MAX5089
2.2MHz, 2A Buck Converters with an
Integrated High-Side Switch
_______________________________________________________________________________________ 5
MAX5088 BUCK EFFICIENCY vs. OUTPUT
CURRENT (V
IN
= 5V, f
SW
= 2.2MHz)
MAX5088/89 toc01
OUTPUT CURRENT (mA)
EFFICIENCY (%)
200015001000500
10
20
30
40
50
60
70
80
90
0
0 2500
3.3V
2.5V
MAX5088 BUCK EFFICIENCY vs. OUTPUT
CURRENT (V
IN
= 12V, f
SW
= 2.2MHz)
MAX5088/89 toc02
OUTPUT CURRENT (mA)
EFFICIENCY (%)
20001500500 1000
10
20
30
40
60
50
70
80
0
0 2500
3.3V
2.5V
MAX5088 BUCK EFFICIENCY vs. OUTPUT
CURRENT (V
IN
= 16V, f
SW
= 2.2MHz)
MAX5088/89 toc03
OUTPUT CURRENT (mA)
EFFICIENCY (%)
200015001000500
10
20
30
40
50
60
70
0
0 2500
3.3V
MAX5089 SYNCHRONOUS
EFFICIENCY vs. OUTPUT CURRENT
(V
IN
= 12V, f
SW
= 330kHz, L = 15µH)
MAX5088/89 toc04
OUTPUT CURRENT (mA)
EFFICIENCY (%)
200015001000500
55
60
65
70
75
80
85
90
95
50
0 2500
3.3V
2.5V
1.2V
MAX5089 SYNCHRONOUS EFFICIENCY vs. OUTPUT
CURRENT (V
IN
= 12V, f
SW
= 2.2MHz, L = 4.7µH)
MAX5088/89 toc05
OUTPUT CURRENT (mA)
EFFICIENCY (%)
200015001000500
35
40
45
50
55
60
65
70
75
80
30
0 2500
3.3V
MAX5089 OUTPUT VOLTAGE vs. OUTPUT
CURRENT (V
IN
= 12V, V
OUT
= 3.3V, f
SW
= 2.2MHz)
MAX5088/89 toc06
OUTPUT CURRENT (mA)
OUTPUT VOLTAGE (V)
2000
1500
1000
500
3.285
3.290
3.295
3.300
3.305
3.310
3.315
3.280
0
V
L
OUTPUT VOLTAGE
vs. SWITCHING FREQUENCY
MAX5088/89 toc07
SWITCHING FREQUENCY (kHz)
V
L
(V)
2100
1600
600
1100
5.155
5.160
5.165
5.170
5.180
5.175
5.185
5.190
5.150
100
V
IN
= 23V
V
IN
= 5.5V
Typical Operating Characteristics
(V+ = V
L
= 5.2V, T
A
= +25°C, Figures 5 and 6, unless otherwise noted.)