Datasheet

(T
A
= +25°C, unless otherwise noted.)
200
150
100
50
0 10050 150 200 250
SWITCH VOLTAGE DROP
vs. LOAD CURRENT
I
CCO
(mA)
V
CCI
- V
CCO
(mV)
V
CC
MODE
T
A
= +75°C
V
CCI
= +4.5V
V
CCI
= +5.0V
MAX1259toc02
0
200
150
100
50
0 5 10 15
SWITCH VOLTAGE DROP
vs. LOAD CURRENT
I
CCO2
(mA)
V
BATT
- V
CCO
(mV)
BATTERY-BACKUP MODE
T
A
= +25°C
V
BATT
= +2.5V
V
BATT
= +3.0V
MAX1259toc03
0
200
150
100
50
0 5 10 15
SWITCH VOLTAGE DROP
vs. LOAD CURRENT
I
CCO2
(mA)
V
BATT
- V
CCO
(mV)
BATTERY-BACKUP MODE
T
A
= +75°C
V
BATT
= +2.5V
V
BATT
= +3.0V
MAX1259toc04
0
3.0
3.6
3.4
3.2
4.0
3.8
4.8
4.6
4.4
4.2
5.0
2.4 2.6 2.8 3.0 3.2 3.4 3.6 3.8
POWER-FAIL TRIP POINT
vs. BATTERY VOLTAGE
V
BATT
(V)
POWER-FAIL TRIP POINT (V)
T
A
= +25°C
V
CCI
RISING
V
CCI
FALLING
MAX1259toc05
1.6
1.8
1.7
2.0
1.9
2.2
2.1
2.3
0 4020 60 8010 5030 70 90 100
BATTERY-FAIL TRIP POINT
vs. TEMPERATURE
TEMPERATURE (°C)
BATTERY-FAIL TRIP POINT (V)
V
CCI
= 5.0V
V
BATT
RISING
V
BATT
FALLING
MAX1259toc06
1.0
0.5
2.0
1.5
3.0
2.5
3.5
0 2 31 4 5 6
QUIESCENT SUPPLY CURRENT
vs. POWER SUPPLY
V
CCI
(V)
I
CCI
(mA)
V
BATT
= 3.0V, I
CCO
= 0mA
T
A
= +25°C
MAX1259toc07
0
200
150
100
50
0 10050 150 200 250
SWITCH VOLTAGE DROP
vs. LOAD CURRENT
I
CCO
(mA)
V
CCI
- V
CCO
(mV)
V
CC
MODE
T
A
= +25°C
V
CCI
= +4.5V
V
CCI
= +5.0V
MAX1259toc01
0
0.8
1.2
1.0
1.6
1.4
1.8
2.0
2.0 3.02.5 3.5 4.0
BAT CURRENT
vs. BATTERY VOLTAGE
V
BATT
(V)
I
BAT
(mA)
V
BATT
- BAT = 100mV
T
A
= +75°C
T
A
= +25°C
MAX1259toc08
0
20
40
60
80
100
2.2 2.8 3.02.4 2.6 3.2 3.4 3.6 3.8 4.0
BAT SWITCH DROP
vs. BATTERY VOLTAGE
V
BATT
(V)
V
BATT
- BAT (mV)
I
BAT
= 100µA
I
BAT
= 1mA
MAX1259toc09
Maxim Integrated │ 4
www.maximintegrated.com
MAX1259 Battery Manager
Typical Operating Characteristics