User guide

40V, High-Performance Synchronous
Buck Controller
MAX15046
_______________________________________________________________________________________ 5
Typical Operating Characteristics
(V
IN
= 24V, T
A
= +25NC, unless otherwise noted.)
EFFICIENCY vs. LOAD CURRENT
(V
IN
= 24V)
MAX15046 toc01
LOAD CURRENT (A)
EFFICIENCY (%)
12963
10
20
30
40
50
60
70
80
90
100
0
0 15
V
OUT
= 5V
V
OUT
= 3.3V
V
OUT
= 1.8V
V
OUT
= 1.2V
EFFICIENCY vs. LOAD CURRENT
(V
IN
= 12V)
MAX15046 toc02
LOAD CURRENT (A)
EFFICIENCY (%)
12963
10
20
30
40
50
60
70
80
90
100
0
0 15
V
OUT
= 5V
V
OUT
= 3.3V
V
OUT
= 1.8V
V
OUT
= 1.2V
V
OUT
vs. LOAD CURRENT
LOAD CURRENT (A)
% OUTPUT FROM NORMAL
108642
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
0.45
0.50
0
0 12
MAX15046 toc03
V
CC
vs. LOAD CURRENT
LOAD CURRENT (mA)
V
CC
(V)
5.244
5.246
5.248
5.250
5.252
5.254
5.256
5.242
MAX15046 toc04
4035302520151050 45
V
CC
LINE REGULATION
V
IN
(V)
V
CC
(V)
3530252015105
4.0
4.2
4.4
4.6
4.8
5.0
5.2
0 40
MAX15046 toc05
I
VCC
= 5mA, 10mA, 20mA, 30mA
I
VCC
= 40mA
V
CC
vs. TEMPERATURE
TEMPERATURE (NC)
V
CC
(V)
1109580655035205-10-25
5.261
5.262
5.263
5.264
5.265
5.266
5.260
-40 125
MAX15046 toc06
I
LOAD
= 5mA
SWITCHING FREQUENCY
vs. R
RT
R
RT
(kI)
FREQUENCY (kHz)
1208040
100
200
300
400
500
600
700
800
900
1000
0
0 160
MAX15046 toc07
SWITCHING FREQUENCY
vs. TEMPERATURE
TEMPERATURE (NC)
FREQUENCY (kHz)
1109580655035205-10-25
200
400
600
800
1000
1200
0
-40 125
MAX15046 toc08
R
T
= 14.3kI
R
T
= 25.5kI
R
T
= 49.9kI
R
T
= 150kI
I
IN
vs.
SWITCHING FREQUENCY
MAX15046 toc09
FREQUENCY (kHz)
I
IN
(mA)
2.3
2.4
2.5
2.6
2.7
2.8
2.2
100 1000
C
DH
= C
DL
= 0