12V PWM Controller with Hot-Swap
_______________________________________________________________________________________ 7
REG OUTPUT VOLTAGE
vs. TEMPERATUREt
TEMPERATURE (癈)
60
35
10
-15
4.90
4.95
5.00
5.05
5.10
5.15
4.85
-40
85
REG OUTPUT VOLTAGE
vs. LOAD CURRENTt
I
REG
(mA)
40
30
20
10
4.90
4.95
5.00
5.05
5.10
5.15
4.85
0
50
REG OUTPUT VOLTAGE
vs. INPUT VOLTAGEt
PWM_IN (V)
14
12
10
4.98
5.00
5.02
5.04
5.06
4.96
8
16
SWITCHING FREQUENCY
vs. R
RT
R
RT
(k&)
450
400
300
350
150
200
250
100
200
300
400
500
600
700
800
900
1000
100
50
500
SWITCHING PERIOD
vs. R
RT
R
RT
(k&)
450
400
300
350
150
200
250
100
2
3
4
5
6
7
8
9
10
1
50
500
SWITCHING FREQUENCY
vs. TEMPERATURE
TEMPERATURE (癈)
60
35
10
-15
980
990
1000
1010
1020
1030
970
-40
85
R
RT
= 49.9k&
FB REFERENCE VOLTAGE
vs. TEMPERATURE
TEMPERATURE (癈)
60
35
10
-15
792
796
800
804
808
788
-40
85
OPEN-LOOP GAIN/PHASE
vs. FREQUENCY
MAX5950 toc16
FREQUENCY (Hz)
1M
10k 100k
1k
10 100
0
-10
50
80
90
60
30
40
10
20
70
100
-20
60
140
180
120
80
100
160
200
40
0
10M
VALLEY CURRENT-LIMIT THRESHOLD
vs. V
ILIM
V
ILIM
(mV)
3000
2500
2000
1500
1000
100
150
200
250
300
350
50
500
3500
Typical Operating Characteristics (continued)
(Typical Application Circuits. V
IN
= V
PWM_IN
= 12V, V
DREG
= V
REG
, V
PGND
= 0V, V
SYNCIN
= 0V, R
RT
= 49.9k&, R
ILIM
= 48.7k&, C
REG
= 2.2礔, T
A
= +25癈, unless otherwise noted.)