MAX15023ETG-T Datasheet, PDF (6/28 Pages) Maxim Integrated Products – Wide 4.5V to 28V Input, Dual-Output Synchronous Buck Controller

MAX15023
Wide 4.5V to 28V Input, Dual-Output
Synchronous Buck Controller
Typical Operating Characteristics (continued)
(Supply = IN = 12V, unless otherwise noted. See Typical Application Circuit of Figure 6.)
IIN + IVCC CURRENT
vs. SWITCHING FREQUENCY
210
VIN = VCC = 5V
180
150
CDL_ = CDH_ = 10nF
120
CDL_ = CDH_ = 4.7nF
90
60
CDL_ = CDH_ = 1nF
30
CDL = CDH = 0nF
0
200 300 400 500 600 700 800 900 1000
SWITCHING FREQUENCY (kHz)
EN_ TURN-ON AND TURN-OFF THRESHOLD
vs. TEMPERATURE
1.250
1.225
1.200
EN_ RISING
1.175
1.150
1.125
1.100
1.075
1.050
EN_ FALLING
1.025
1.000
-40 -15
10
35
60
85
TEMPERATURE (°C)
LIM_ CURRENT
vs. TEMPERATURE
60
58
56
54
52
50
ILIM2
48
ILIM1
46
44
42
40
38
-40 -15
10
35
60
85
TEMPERATURE (°C)
SHUTDOWN CURRENT
vs. TEMPERATURE
230
225
220
215
210
205
200
-40 -15
10
35
60
85
TEMPERATURE (°C)
CURRENT-LIMIT THRESHOLD
vs. RLIM
300
270
240
210
SOURCE CURRENT LIMIT
180
150
120
90
60
SINK CURRENT LIMIT
30
0
5 10 15 20 25 30 35 40 45 50 55 60
RLIM (kΩ)
LOAD TRANSIENT ON OUT1
MAX15023 toc15
LOAD TRANSIENT ON OUT2
MAX15023 toc16
VOUT1 (AC-COUPLED)
100mV/div
VOUT2 (AC-COUPLED)
50mV/div
IOUT1
5A/div
VOUT2 (AC-COUPLED)
200mV/div
VOUT1 (AC-COUPLED)
100mV/div
IOUT2
2A/div
10µs/div
6
10µs/div
Maxim Integrated