Rainbow Electronics MAX1835 - Manual (Page 4)

Typical Operating Characteristics
(V OUT = +3.3V, V BATT = +2V, unless otherwise noted.) (Figure 1)
95
65
0.1 10 100 1 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 = 309 Ω
R2 = 100k Ω
MAX1834
V BATT = +2.7V
V BATT = +3.3V
0.1 10 1 100 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 10 1 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 = 100k Ω
R2 = 100k Ω
C IN = 20 µF
C OUT = 20 µF
MAX1834
0
50
150
100
200
250
1 3 2 4 5 6
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 10k 1k 100
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 -1 0 1 2 3 4 5 6
INPUT CURRENT AND OUTPUT VOLTAGE
vs. BATTERY VOLTAGE (SHUTDOWN, NO LOAD)
MAX1832/35 toc06
V BATT (V)
I BATT
(µ
A)
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 -1 0 1 2 3 4 5 6
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 = 22 Ω
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 -1 0 1 2 3 4 5 6
INPUT CURRENT AND OUTPUT VOLTAGE
vs. BATTERY VOLTAGE (ON, NO LOAD)
MAX1832/35 toc08
V BATT (V)
I BATT
(µ
A)
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 = 1M Ω
R4 = 220k Ω
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 -1 0 1 2 3 4 5 6
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 = 22 Ω
R3 = 1M Ω
R4 = 220k Ω
C1 = 10nF