Instruction Manual

MAX15023
Wide 4.5V to 28V Input, Dual-Output
Synchronous Buck Controller
6 _______________________________________________________________________________________
Typical Operating Characteristics (continued)
(Supply = IN = 12V, unless otherwise noted. See Typical Application Circuit of Figure 6.)
I
IN
+ I
VCC
CURRENT
vs. SWITCHING FREQUENCY
MAX15023 toc10
SWITCHING FREQUENCY (kHz)
I
IN
+ I
VCC
CURRENT (mA)
900800700600500400300
30
60
90
120
150
180
210
0
200 1000
V
IN
= V
CC
= 5V
C
DL_
= C
DH_
= 10nF
C
DL_
= C
DH_
= 4.7nF
C
DL_
= C
DH_
= 1nF
C
DL
= C
DH
= 0nF
EN_ TURN-ON AND TURN-OFF THRESHOLD
vs. TEMPERATURE
MAX15023 toc11
TEMPERATURE (°C)
EN_ TURN-ON AND TURN-OFF THRESHOLDS
603510-15
1.025
1.050
1.075
1.100
1.125
1.150
1.175
1.200
1.225
1.250
1.000
-40 85
EN_ RISING
EN_ FALLING
LIM_ CURRENT
vs. TEMPERATURE
MAX15023 toc12
TEMPERATURE (°C)
LIM_ CURRENT (µA)
603510-15
40
42
44
46
48
50
52
54
56
58
60
38
-40 85
I
LIM2
I
LIM1
SHUTDOWN CURRENT
vs. TEMPERATURE
MAX15023 toc13
TEMPERATURE (°C)
SHUTDOWN CURRENT (µA)
603510-15
205
210
215
220
225
230
200
-40 85
CURRENT-LIMIT THRESHOLD
vs. R
LIM
MAX15023 toc14
R
LIM
(kΩ)
CURRENT-LIMIT THRESHOLD (mV)
555040 4515 20 25 30 3510
30
60
90
120
150
180
210
240
270
300
0
560
SOURCE CURRENT LIMIT
SINK CURRENT LIMIT
LOAD TRANSIENT ON OUT1
MAX15023 toc15
10µs/div
V
OUT1
(AC-COUPLED)
100mV/div
V
OUT2
(AC-COUPLED)
50mV/div
I
OUT1
5A/div
LOAD TRANSIENT ON OUT2
MAX15023 toc16
10µs/div
V
OUT2
(AC-COUPLED)
200mV/div
V
OUT1
(AC-COUPLED)
100mV/div
I
OUT2
2A/div