5 V/3 .3 V o r Ad ju s t a b le , Hig h -Effic ie n c y,
Lo w -Dro p o u t , S t e p -Do w n DC-DC Co n t ro lle rs
____________________________Typ ic a l Op e ra t in g Ch a ra c t e ris t ic s (c o n t in u e d )
(T = +25°C, unless otherwise noted.)
A
SWITCH ON-TIME
vs. TEMPERATURE
SWITCH OFF-TIME
vs. TEMPERATURE
MAXIMUM DUTY CYCLE
vs. TEMPERATURE
34.0
1.5
1.4
100
99
33.5
33.0
32.5
32.0
31.5
31.0
30.5
30.0
1.3
1.2
98
1.1
1.0
97
96
0.9
0.8
0.7
0.6
95
94
93
0.5
-60 -40 -20
0
20 40 60 80 100 120 140
-60 -40 -20
0
20 40 60 80 100 120 140
-60 -40 -20
0
20 40 60 80 100 120 140
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
49/MAX651
DROPOUT VOLTAGE
vs. LOAD CURRENT
CS TRIP LEVEL
vs. TEMPERATURE
600
500
120
115
CIRCUIT OF
FIGURE 1
400
300
V
OUT
= 4.80V
110
105
100
V
OUT
= 3.17V
200
100
0
95
0
0.5
1.0
1.5
2.0
-60 -40 -20
0
20 40 60 80 100 120 140
LOAD CURRENT (A)
TEMPERATURE (°C)
REFERENCE OUTPUT VOLTAGE
vs. TEMPERATURE
REFERENCE OUTPUT RESISTANCE
vs. TEMPERATURE
1.506
1.504
1.502
1.500
1.498
1.496
1.494
250
I
= 10µA
200
150
100
50
REF
I
REF
= 10µA
I
REF
= 50µA
I
= 100µA
REF
1.492
0
-60 -40 -20
0
20 40 60 80 100 120 140
-60 -40 -20
0
20 40 60 80 100 120 140
TEMPERATURE (°C)
TEMPERATURE (°C)
4
_______________________________________________________________________________________
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
