Datasheet

MAX5088/MAX5089
2.2MHz, 2A Buck Converters with an
Integrated High-Side Switch
_______________________________________________________________________________________ 7
Typical Operating Characteristics (continued)
(V+ = V
L
= 5.2V, T
A
= +25°C, Figures 5 and 6, unless otherwise noted.)
MAX5089 SOFT-START AND SHUTDOWN
(I
OUT
= 2A)
MAX5088/89 toc15
1ms/div
V
OUT
1V/div
0V
0V
5V/div
V
EN
V
IN
= 12V
V
IN
STARTUP WAVEFORM
(EN CONNECTED TO V
L
)
MAX5088/89 toc16
1ms/div
V
EN
5V/div
V
OUT
2V/div
V
PGOOD
5V/div
V
IN
10V/div
RESET TIMEOUT
MAX5088/89 toc17
40ms/div
10V/div
V
IN
V
EN
V
OUT
V
RESET
5V/div
5V/div
2V/div
MAX5088 EXTERNALLY SYNCHRONIZED
SWITCHING WAVEFORM
MAX5088/89 toc18
100ns/div
5V/div
5V/div
10V/div
0V
0V
0V
V
SYNC
V
CLKOUT
V
SOURCE
V
OUT
500mV/div
SHUTDOWN CURRENT
vs. TEMPERATURE
MAX5088/89 toc19
TEMPERATURE (°C)
SHUTDOWN CURRENT (µA)
110
60
10
350
400
450
500
300
-40
SWITCHING SUPPLY CURRENT (I
SW
)
vs. TEMPERATURE
MAX5088/89 toc20
TEMPERATURE (°C)
SWITCHING SUPPLY CURRENT (mA)
10075-25 0 25 50
10
20
30
40
50
60
70
80
0
-50 125
MAX5088
V
OUT
= 3.3V
I
OUT
= 1A
f
SYNC
= 2.2MHz
f
SYNC
= 1.2MHz
f
SYNC
= 600kHz
f
SYNC
= 300kHz
CURRENT LIMIT
vs. TEMPERATURE
MAX5088/89 toc21
TEMPERATURE (°C)
CURRENT LIMIT (A)
110
60
10
2.40
2.45
2.50
2.55
2.60
2.65
2.70
2.75
2.35
-40
V
IN
= 12V
V
OUT
= 3.3V
f
SW
= 1MHz