MAX1833 Maxim, MAX1833 Datasheet - Page 4

• Manufacturer Part Number: MAX1833
• Description: High-Efficiency Step-Up Converters with Reverse Battery Protection
• Manufacturer: Maxim

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