Reset, Typical operating characteristics – Rainbow Electronics MAX1947 User Manual
Page 4
MAX1947
Low Input/Output Voltage
Step-Up DC-DC Converter with
RESET
4
_______________________________________________________________________________________
Typical Operating Characteristics
(V
IN
= 1.5V, Circuit of Typical Application Circuit, T
A
= +25°C, unless otherwise noted.)
0.1
10
1
100
1000
MAX1947ETA18
EFFICIENCY vs. LOAD CURRENT
MAX1947toc01
LOAD CURRENT (mA)
EFFICIENCY (%)
100
60
70
80
90
65
75
85
95
V
IN
= 1.6V
V
IN
= 1.25V
V
IN
= 1V
0.1
10
1
100
1000
MAX1947ETA33
EFFICIENCY vs. LOAD CURRENT
MAX1947toc04
LOAD CURRENT (mA)
EFFICIENCY (%)
100
60
70
80
90
65
75
85
95
V
IN
= 1.8V
V
IN
= 1.25V
V
IN
= 1V
V
IN
= 2.5V
0.6
1.0
0.8
1.4
1.2
1.6
1.8
2.0
STARTUP VOLTAGE
vs. LOAD CURRENT
MAX1947toc07
LOAD CURRENT (mA)
STARTUP VOLTAGE (V)
0
40
60
20
100
140
80
120
V
OUT
= 1.8V
V
OUT
= 2.5V
V
OUT
= 3.0V
V
OUT
= 3.3V
0.1
10
1
100
1000
MAX1947ETA25
EFFICIENCY vs. LOAD CURRENT
MAX1947toc02
LOAD CURRENT (mA)
EFFICIENCY (%)
100
60
70
80
90
65
75
85
95
V
IN
= 1.6V
V
IN
= 1.25V
V
IN
= 1V
0
400
200
800
600
1000
1200
MAXIMUM OUTPUT CURRENT
vs. INPUT VOLTAGE
MAX1947toc05
INPUT VOLTAGE (V)
MAXIMUM OUTPUT CURRENT (mA)
0.7
1.7
2.2
1.2
2.7
3.2
3.7
V
OUT
= 1.8V
V
OUT
= 2.5V
V
OUT
= 3.0V
V
OUT
= 3.3V
0
0.3
0.2
0.1
0.4
0.5
0.6
0.7
0.8
0.9
1.0
-40
10
-15
35
60
85
STARTUP VOLTAGE
vs. TEMPERATURE
MAX1947toc08
TEMPERATURE (°C)
STARTUP VOLTAGE (V)
R
LOAD
= 1kΩ
R
LOAD
= 0Ω
0.1
10
1
100
1000
MAX1947ETA30
EFFICIENCY vs. LOAD CURRENT
MAX1947toc03
LOAD CURRENT (mA)
EFFICIENCY (%)
100
60
70
80
90
65
75
85
95
V
IN
= 1.8V
V
IN
= 1.25V
V
IN
= 1V
V
IN
= 2.5V
0
200
100
400
300
500
600
NO-LOAD INPUT CURRENT
vs. INPUT VOLTAGE
MAX1947toc06
INPUT VOLTAGE (V)
INPUT CURRENT (
µ
A)
0.7
1.7
2.2
1.2
2.7
3.2
3.7
V
OUT
= 1.8V
V
OUT
= 2.5V
V
OUT
= 3.3V
0
0.6
0.4
0.2
0.8
1.0
1.2
1.4
1.6
1.8
2.0
0.7
1.7
1.2
2.2
2.7
3.2
3.7
SHUTDOWN THRESHOLD
vs. INPUT VOLTAGE
MAX1947toc09
INPUT VOLTAGE (V)
SHUTDOWN THRESHOLD (V)