Datasheet

MAX5038/MAX5041
Dual-Phase, Parallelable, Average Current-Mode
Controllers
6 _______________________________________________________________________________________
Typical Operating Characteristics (continued)
(Circuit of Figure 1, T
A
= +25°C, unless otherwise noted.)
CURRENT-SENSE THRESHOLD
vs. OUTPUT VOLTAGE
MAX5038/41 toc10
V
OUT
(V)
(V
CSP_
- V
CSN_
) (mV)
1.71.61.4 1.51.2 1.31.1
46
47
48
49
50
51
52
53
54
55
45
1.0 1.8
PHASE 2
PHASE 1
OUTPUT VOLTAGE vs. OUTPUT CURRENT
AND ERROR AMP GAIN (R
F
/ R
IN
)
MAX5038/41 toc11
I
LOAD
(A)
V
OUT
(V)
5045403530252015105
1.65
1.70
1.75
1.80
1.85
1.60
055
V
IN
= +12V
V
OUT
= +1.8V
R
F
/ R
IN
= 15
R
F
/ R
IN
= 12.5
R
F
/ R
IN
= 10
R
F
/ R
IN
= 7.5
DIFFERENTIAL AMPLIFIER BANDWIDTH
MAX5038/41 toc12
FREQUENCY (MHz)
GAIN (V/V)
PHASE (deg)
10.1
0.5
1.0
1.5
2.0
2.5
3.0
3.5
0
0.01 10
-225
-270
-180
-135
-90
-45
0
45
90
PHASE
GAIN
DIFF OUTPUT ERROR
vs. SENSE+ TO SENSE- VOLTAGE
MAX5038/41 toc13
∆V
SENSE
(V)
ERROR (%)
1.91.81.1 1.2 1.3 1.5 1.61.4 1.7
0.025
0.050
0.075
0.100
0.125
0.150
0.175
0.200
0
1.0 2.0
V
IN
= +12V
NO DRIVER
V
CC
LOAD REGULATION
vs. INPUT VOLTAGE
MAX5038/41 toc14
I
CC
(mA)
V
CC
(V)
13512015 30 45 75 9060 105
4.85
4.90
4.95
5.00
5.05
5.10
5.15
5.20
4.80
0 150
V
IN
= +24V
V
IN
= +12V
V
IN
= +8V
DC LOAD
V
CC
LINE REGULATION
MAX5038/41 toc15
V
IN
(V)
V
CC
(V)
262420 2212 14 16 1810
4.80
4.85
4.90
4.95
5.00
5.05
5.10
5.15
5.20
5.25
4.75
828
I
CC
= 0
I
CC
= 40mA
V
CC
LINE REGULATION
MAX5038/41 toc16
V
IN
(V)
V
CC
(V)
13.012.09.0 10.0 11.0
4.80
4.85
4.90
4.95
5.00
5.05
5.10
5.15
5.20
5.25
4.75
8.0
I
CC
= 80mA
DRIVER RISE TIME
vs. DRIVER LOAD CAPACITANCE
MAX5038/41 toc17
C
DRIVER
(nF)
t
R
(ns)
312616 21116
10
20
30
40
50
60
70
80
90
100
110
120
0
136
DL_
DH_
V
IN
= +12V
f
SW
= 250kHz
DRIVER FALL TIME
vs. DRIVER LOAD CAPACITANCE
MAX5038/41 toc18
C
DRIVER
(nF)
t
F
(ns)
312616 21116
10
20
30
40
50
60
70
80
90
100
110
120
0
136
DL_
DH_
V
IN
= +12V
f
SW
= 250kHz