Max1800 digital camera step-up power supply, Typical operating characteristics – Rainbow Electronics MAX1800 User Manual
Page 5
MAX1800
Digital Camera Step-Up
Power Supply
_______________________________________________________________________________________
5
Typical Operating Characteristics
(Circuit of Figure 1, V
INPUT
= 2.4V, T
A
= +25°C, unless otherwise noted.)
90
0
1
1000
100
10
MAIN OUTPUT
EFFICIENCY vs. LOAD CURRENT
30
10
70
50
100
40
20
80
60
MAX1800 toc01
LOAD CURRENT (mA)
EFFICIENCY (%)
V
OUT
= 2.7V
V
IN
= 2.5V
V
IN
= 2.0V
V
IN
= 1.5V
90
0
1
1000
100
10
MAIN OUTPUT
EFFICIENCY vs. LOAD CURRENT
30
10
70
50
100
40
20
80
60
MAX1800 toc02
LOAD CURRENT (mA)
EFFICIENCY (%)
V
OUT
= 3.3V
V
IN
= 3.0V
V
IN
= 2.0V
V
IN
= 2.5V
V
IN
= 1.5V
90
0
1
1000
100
10
30
10
70
50
100
40
20
80
60
MAX1800 toc03
LOAD CURRENT (mA)
EFFICIENCY (%)
V
OUT
= 5V
V
IN
= 3.0V
V
IN
= 2.0V
V
IN
= 2.5V
V
IN
= 1.5V
MAIN OUTPUT
EFFICIENCY vs. LOAD CURRENT
1.240
1.245
1.250
1.255
1.260
REFERENCE VOLTAGE vs.
TEMPERATURE
MAX1800 toc05
TEMPERATURE (
°C)
REFERENCE VOLTAGE (V)
-40
20
40
-20
0
60
80
1.247
1.249
1.248
1.251
1.250
1.252
1.253
0
100
50
150
200
250
REFERENCE VOLTAGE
vs. REFERENCE CURRENT
MAX1800 toc06
REFERENCE CURRENT (
µA)
REFERENCE VOLTAGE (V)
0
400
300
200
100
500
600
0
0.5
1.0
1.5
2.0
2.5
MAX1800 toc04
INPUT VOLTAGE (V)
STARTUP CURRENT (mA)
MINIMUM STARTUP CURRENT
vs. INPUT VOLTAGE