Typical operating characteristics – Rainbow Electronics MAX685 User Manual
Page 4
1.240
1.242
1.244
1.248
1.246
1.250
1.252
1.254
-40
20
0
-20
40
60
80
100
REFERENCE VOLTAGE
vs. TEMPERATURE
MAX685-13
TEMPERATURE (°C)
REFERENCE VOLTAGE (V)
V
IN
= 5.0V
V
IN
= 3.3V
MAX685
Dual-Output (Positive and Negative),
DC-DC Converter for CCD and LCD
4
_______________________________________________________________________________________
60
70
80
90
0
4
2
6
8
10
EFFICIENCY vs. LOAD CURRENT
(POSITIVE OUTPUT LOADED)
MAX685-01
LOAD CURRENT (mA)
EFFICIENCY (%)
V
IN
= 5.0V
V
IN
= 3.3V
50
60
55
70
65
80
75
85
0
4
2
3
5
1
6
7
9
8
10
EFFICIENCY vs. LOAD CURRENT
(NEGATIVE OUTPUT LOADED)
MAX685-02
LOAD CURRENT (mA)
EFFICIENCY (%)
V
IN
= 5.0V
V
IN
= 3.3V
50
65
55
60
75
70
85
80
90
0
4
2
6
8
10
EFFICIENCY vs. LOAD CURRENT
(BOTH OUTPUTS LOADED)
MAX685-03
LOAD CURRENT (mA)
EFFICIENCY (%)
V
IN
= 5.0V
V
IN
= 3.3V
0
0.5
1.0
1.5
2.0
2.5
3.5
3.0
4.0
4.5
5.0
5.5
NO-LOAD CURRENT vs.
INPUT VOLTAGE
MAX685-04
INPUT VOLTAGE (V)
NO-LOAD CURRENT (mA)
150
180
170
160
190
200
210
220
230
240
250
2.7
3.7
3.2
4.2
4.7
5.2
5.7
LX SWITCHING FREQUENCY
vs. INPUT VOLTAGE
MAX865-07
INPUT VOLTAGE (V)
OSCILLATOR FREQUENCY (kHz)
SYNC = V
DD
1.248
1.249
1.250
0
15 20
5
10
25 30
35 40 45
50
REFERENCE LOAD REGULATION
MAX685-06
LOAD CURRENT (µA)
REFERENCE VOLTAGE (V)
Typical Operating Characteristics
(Circuit of Figure 3, V
OUT+
= 15V, V
OUT-
= -7.5V, T
A
= +25°C, unless otherwise noted.)