5V/12V/15V or Adjustable, High-Efficiency,
Low I
Q
, Step-Up DC-DC Controllers
____________________________Typical Operating Characteristics (continued)
(T
A
= +25°C, unless otherwise noted.)
REFERENCE OUTPUT RESISTANCE vs.
TEMPERATURE
REFERENCE OUTPUT RESISTANCE (Ω)
MAX770–3-10
MAX770–MAX773
REFERENCE vs. TEMPERATURE
MAX770–3-11
250
1.506
1.504
1.502
REFERENCE (V)
1.500
1.498
1.496
1.494
1.492
200
10µA
150
100
50µA
100µA
50
0
-60 -40 -20
0 20 40 60 80 100 120 140
TEMPERATURE (°C)
-60 -40 -20
0 20 40 60 80 100 120 140
TEMPERATURE (°C)
MAXIMUM SWITCH ON-TIME vs.
TEMPERATURE
MAX770–3-13
SHUTDOWN CURRENT vs. TEMPERATURE
3.5
3.0
MAX770–3-12
16.5
4.0
tON(MAX) (µs)
16.0
I
CC
(µA)
2.5
2.0
1.5
V+ = 8V
1.0
0.5
V+ = 4V
-60 -40 -20
0 20 40 60 80 100 120 140
TEMPERATURE (°C)
V+ = 15V
15.5
-60 -30
0
30
60
90
120 150
TEMPERATURE (°C)
0
MINIMUM SWITCH OFF-TIME vs.
TEMPERATURE
MAX770–3-14
MAXIMUM SWITCH ON-TIME/
MINIMUM SWITCH OFF-TIME RATIO
vs. TEMPERATURE
MAX770–3-15
2.30
8.0
tON(MAX)/tOFF(MIN) RATIO
7.5
tOFF(MIN) (µs)
2.25
7.0
6.5
2.20
-60 -30
0
30
60
90
120 150
TEMPERATURE (°C)
6.0
-60 -30
0
30
60
90
120 150
TEMPERATURE (°C)
_______________________________________________________________________________________
5
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
