Instruction Manual

MAX15026
Low-Cost, Small, 4.5V to 28V Wide Operating
Range, DC-DC Synchronous Buck Controller
6 _______________________________________________________________________________________
Typical Operating Characteristics (continued)
(V
IN
= 12V, T
A
= +25°C, unless otherwise noted.) (See the circuit of Figure 5.)
LIM REFERENCE CURRENT
vs. TEMPERATURE
MAX15026 toc10
TEMPERATURE (
°
C)
LIM REFERENCE CURRENT (µA)
603510-15
10
20
30
40
50
60
70
0
-40 85
SINK AND SOURCE CURRENT-LIMIT
THRESHOLDS vs. RESISTANCE (R
ILIM
)
MAX15026 toc11
RESISTANCE (k
Ω
)
CURRENT-LIMIT THRESHOLDS (V)
605040302010
-0.3
-0.2
-0.1
0
0.1
0.2
-0.4
070
SINK CURRENT-LIMIT
SOURCE CURRENT-LIMIT
LOAD TRANSIENT ON OUT
MAX15026 toc12
400
µ
s/div
AC-COUPLED
V
OUT
200mV/div
I
OUT
10A
1A
STARTUP AND DISABLE FROM EN
(R
LOAD
= 1.5Ω)
MAX15026 toc13
4ms/div
V
OUT
1V/div
V
IN
5V/div
PGOOD
5V/div
STARTUP RISE TIME
MAX15026 toc14
1ms/div
V
IN
5V/div
V
OUT
1V/div
POWER-DOWN FALL TIME
MAX15026 toc15
4ms/div
V
IN
5V/div
V
OUT
1V/div
STARTUP WITH PREBIASED
OUTPUT (1.5V)
MAX15026 toc16
1ms/div
V
IN
5V/div
V
OUT
1V/div
0.5V OUTPUT PREBIAS
STARTUP WITH PREBIASED
OUTPUT (1.5V)
MAX15026 toc17
2ms/div
V
IN
5V/div
V
OUT
1V/div
2V OUTPUT PREBIAS
OUTPUT SHORT-CIRCUIT BEHAVIOR MONITOR
OUTPUT VOLTAGE AND CURRENT
MAX15026 toc18
4ms/div
500mV/div
0
V
OUT
I
OUT
20A/div
0