Typical operating characteristics (continued) – Rainbow Electronics MAX1655 User Manual
Page 4
MAX1649/MAX1651
5V/3.3V or Adjustable, High-Efficiency,
Low-Dropout, Step-Down DC-DC Controllers
4
_______________________________________________________________________________________
-60
-20
60
140
SWITCH ON-TIME
vs. TEMPERATURE
MAX1649/51-03
TEMPERATURE (°C)
t
ON
(
µ
s)
20
100
-40
0
80
40
120
34.0
33.5
33.0
32.5
32.0
31.5
31.0
30.0
30.5
-60
-20
60
140
SWITCH OFF-TIME
vs. TEMPERATURE
MAX1649/51-04
TEMPERATURE (°C)
t
OFF
(
µ
s)
20
100
-40
0
80
40
120
1.5
1.4
1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
-60
-20
60
140
MAXIMUM DUTY CYCLE
vs. TEMPERATURE
MAX1649/51-05
TEMPERATURE (°C)
DUTY CYCLE (%)
20
100
-40
0
80
40
120
100
99
98
97
96
95
94
93
-60
-20
60
140
CS TRIP LEVEL
vs. TEMPERATURE
MAX1649/51-06
TEMPERATURE (°C)
CS TRIP LEVEL (mV)
20
100
-40
0
80
40
120
120
115
110
100
105
95
0
0.5
1.0
1.5
2.0
DROPOUT VOLTAGE
vs. LOAD CURRENT
MAX1649/51-A3
LOAD CURRENT (A)
DROPOUT VOLTAGE (mV)
600
500
400
300
200
100
0
V
OUT
= 4.80V
V
OUT
= 3.17V
CIRCUIT OF
FIGURE 1
250
0
REFERENCE OUTPUT RESISTANCE
vs. TEMPERATURE
50
200
REFERENCE OUTPUT RESISTANCE (
Ω
)
150
100
-60
-20
60
140
MAX1649-TOC07
TEMPERATURE (°C)
20
100
-40
0
80
40
120
I
REF
= 10
µ
A
I
REF
= 50
µ
A
I
REF
= 100
µ
A
1.506
1.492
REFERENCE OUTPUT VOLTAGE
vs. TEMPERATURE
1.494
1.504
REFERENCE OUTPUT VOLTAGE (V)
1.502
1.500
-60
-20
60
140
MAX1649-TOC01
TEMPERATURE (°C)
20
100
-40
0
80
40
120
1.498
1.496
I
REF
= 10
µ
A
____________________________Typical Operating Characteristics (continued)
(T
A
= +25°C, unless otherwise noted.)