User Manual

Typical Operating Characteristics
(V
OUT
= +3.3V, V
BATT
= +2V, unless otherwise noted.) (Figure 1)
95
65
0.1 10 1001 1000
EFFICIENCY vs. LOAD CURRENT
(V
OUT
= 5.0V)
MAX1832/35 toc01
I
LOAD
(mA)
EFFICIENCY (%)
70
75
80
85
90
V
BATT
= +1.5V
V
SHDN
= V
BATT
R1 = 309Ω
R2 = 100kΩ
MAX1834
V
BATT
= +2.7V
V
BATT
= +3.3V
0.1 101 100 1000
EFFICIENCY vs. LOAD CURRENT
(V
OUT
= 3.3V)
MAX1832/35 toc02
I
LOAD
(mA)
EFFICIENCY (%)
95
75
80
85
90
V
BATT
= +2.7V
V
BATT
= +1.5V
V
BATT
= +2.0V
V
SHDN
= V
BATT
MAX1835
0.1 101 10 100
EFFICIENCY vs. LOAD CURRENT
(V
OUT
= 2.5V)
MAX1832/35 toc03
I
LOAD
(mA)
EFFICIENCY (%)
85
70
75
80
V
BATT
= +2.0V
V
BATT
= +1.5V
V
SHDN
= V
BATT
R1 = 100kΩ
R2 = 100kΩ
C
IN
= 20µF
C
OUT
= 20µF
MAX1834
0
50
150
100
200
250
132456
MAXIMUM OUTPUT CURRENT
vs. BATTERY VOLTAGE
MAX1832/35 toc04
V
BATT
(V)
I
LOAD
(mA)
V
OUT
= +3.3V
V
OUT
= +5.0V
V
OUT
= +2.5V
1.2
10 10k1k100
STARTUP BATTERY VOLTAGE
vs. LOAD RESISTANCE
1.7
1.4
1.3
1.6
1.5
MAX1832/35 toc05
R
LOAD
(Ω)
V
BATT
(V)
V
SHDN
= V
BATT
V
OUT
= +5.0V
V
OUT
= +3.3V
V
OUT
= +2.5V
-0.2
0.2
0
0.6
0.4
1.0
0.8
1.2
-6 -4 -3 -2-5 -10123456
INPUT CURRENT AND OUTPUT VOLTAGE
vs. BATTERY VOLTAGE (SHUTDOWN, NO LOAD)
MAX1832/35 toc06
V
BATT
(V)
I
BATT
(µA)
I
BATT
V
SHDN
= 0
R
LOAD
= ∞
MAX1833
V
OUT
5
4
3
2
1
0
6
-1
V
OUT
(V)
-50
50
0
150
100
250
200
300
-6 -4 -3 -2-5 -10123456
INPUT CURRENT AND OUTPUT VOLTAGE
vs. BATTERY VOLTAGE (SHUTDOWN, LOADED)
MAX1832/35 toc07
V
BATT
(V)
I
BATT
(mA)
I
BATT
V
SHDN
= 0
R
LOAD
= 22Ω
MAX1833
V
OUT
5
4
3
2
1
0
6
-1
V
OUT
(V)
-20
60
0
100
80
140
120
160
-6 -4 -3 -2-5 -10123456
INPUT CURRENT AND OUTPUT VOLTAGE
vs. BATTERY VOLTAGE (ON, NO LOAD)
MAX1832/35 toc08
V
BATT
(V)
I
BATT
(µA)
I
BATT
3.5
3.0
2.5
1.5
0.5
0
4.0
-0.5
V
OUT
(V)
40
20
V
SHDN
= V
BATT
R
LOAD
= ∞
R3 = 1MΩ
R4 = 220kΩ
C1 = 10nF
V
OUT
2.0
1.0
I
BATT
MAX1832–MAX1835
High-Efficiency Step-Up Converters with
Reverse Battery Protection in SOT23-6
4 _______________________________________________________________________________________
-50
50
0
150
100
250
200
300
-6 -4 -3 -2-5 -10123456
INPUT CURRENT AND OUTPUT VOLTAGE
vs. BATTERY VOLTAGE (ON, LOADED)
MAX1832/35 toc09
V
BATT
(V)
I
BATT
(mA)
I
BATT
5
4
3
2
1
0
6
-1
V
OUT
(V)
V
OUT
V
SHDN
= V
BATT
V
OUT
= 3.3V
R
LOAD
= 22Ω
R3 = 1MΩ
R4 = 220kΩ
C1 = 10nF