Rainbow Electronics MAX15023 - Manual (Page 5)

MAX15023
Wide 4.5V to 28V Input, Dual-Output
Synchronous Buck Controller
_______________________________________________________________________________________ 5
EFFICIENCY
vs. LOAD CURRENT
MAX15023 toc01
LOAD CURRENT (A)
EFFICIENCY (%)
10 1
35
40
45
50
55
60
65
70
75
80
85
90
95
30
0.1 100
V IN = 12V
V OUT1 = 1.2V
V OUT1 = 3.3V
EFFICIENCY
vs. LOAD CURRENT
MAX15023 toc02
LOAD CURRENT (A)
EFFICIENCY (%)
10 1
35
40
45
50
55
60
65
70
75
80
85
90
95
100
30
0.1 100
V OUT1 = 1.2V
V OUT1 = 3.3V
V IN = V CC = 5V
OUTPUT VOLTAGE CHANGE
vs. LOAD CURRENT
MAX15023 toc03
LOAD CURRENT (A)
OUTPUT VOLTAGE CHANGE (%)
10 8 6 4 2
99.2
99.4
99.6
99.8
100.0
100.2
100.4
100.6
100.8
101.0
99.0
0 12
OUT1
V CC VOLTAGE
vs. LOAD CURRENT
MAX15023 toc04
LOAD CURRENT (mA)
SUPPLY VOLTAGE (V)
135 120 15 30 45 75 90 60 105
5.05
5.10
5.15
5.20
5.25
5.30
5.35
5.40
5.00
0 150
V CC VOLTAGE
vs. IN VOLTAGE
MAX15023 toc05
IN VOLTAGE (V)
V
CC
VOLTAGE (V)
24 20 16 12 8
4.15
4.30
4.45
4.60
4.75
4.90
5.05
5.20
5.35
5.50
4.00
4 28
I LOAD = 5mA
I LOAD = 50mA
V CC VOLTAGE
vs. TEMPERATURE
MAX15023 toc06
TEMPERATURE ( °C)
SUPPLY VOLTAGE (V)
30 35 10 -15
5.05
5.10
5.15
5.20
5.25
5.30
5.35
5.40
5.45
5.50
5.00
-40 85
I LOAD = 5mA
SWITCHING FREQUENCY
vs. R T
MAX15023 toc07
R T (k Ω)
SWITCHING FREQUENCY (kHz)
80 70 50 60 30 40 20
200
300
400
500
600
700
800
900
1000
1100
1200
1300
100
10 90
SWITCHING FREQUENCY
vs. TEMPERATURE
MAX15023 toc08
TEMPERATURE ( °C)
SWITCHING FREQUENCY (kHz)
60 35 10 -15
250
300
350
400
450
500
550
600
650
700
750
800
200
-40 85
R T = 22.1k Ω
R T = 33.2k Ω
R T = 66.5k Ω
I IN CURRENT
vs. SWITCHING FREQUENCY
MAX15023 toc09
SWITCHING FREQUENCY (kHz)
I IN
CURRENT (mA)
900 800 700 600 500 400 300
30
60
90
120
150
180
210
0
200 1000
V IN = 12V
C DL = C DH = 10nF
C DL = C DH = 4.7nF
C DL = C DH = 1nF
C DL = C DH = 0nF
Typical Operating Characteristics
(Supply = IN = 12V, unless otherwise noted. See Typical Application Circuit of Figure 6.)