MAX848 Ver la hoja de datos (PDF) - Maxim Integrated
Número de pieza
componentes Descripción
Fabricante
MAX848 Datasheet PDF : 16 Pages
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1-Cell to 3-Cell, High-Power,
Low-Noise, Step-Up DC-DC Converters
(TA = +25°C, unless otherwise noted.)
MAX849
EFFICIENCY vs. LOAD CURRENT
(VOUT = 3.3V)
100
VIN = 2.4V
90
80
VIN = 1.2V
70
60
VIN = 0.9V
50
40
0.1
PFM
PWM
1
10
100
1000
LOAD CURRENT (mA)
Typical Operating Characteristics
MAX849
EFFICIENCY vs. LOAD CURRENT
(VOUT = 5V)
100
VIN = 3.6V
90 VIN = 2.4V
80
70
60
VIN = 1.2V
50
40
30
0.1
PFM
PWM
1
10
100
1000
LOAD CURRENT (mA)
MAX848
EFFICIENCY vs. LOAD CURRENT
(VOUT = 3.3V)
100
VIN = 2.4V
90
80
70
60
0.1
VIN = 1.2V
VIN = 0.9V
PFM
PWM
1
10
100
1000
LOAD CURRENT (mA)
NO-LOAD BATTERY CURRENT
vs. INPUT VOLTAGE
14
12
10
TA = +85°C
8
TA = +25°C
6
4
2 TA = -40°C
0
0
1
2
3
45
6
INPUT VOLTAGE (V)
REFERENCE VOLTAGE
vs. TEMPERATURE
1.252
1.251
1.250
1.249
1.248
-40 -20
0 20 40 60
TEMPERATURE (°C)
80 100
SHUTDOWN CURRENT
vs. INPUT VOLTAGE
18
16
INCLUDES ALL EXTERNAL
COMPONENT LEAKAGES.
14 CAPACITOR LEAKAGE
DOMINATES AT
12 TA = +85°C
10
TA = +85°C
8
6
TA = +25°C
4
2
TA = -40°C
0
0
1
2
34
5
6
INPUT VOLTAGE (V)
REFERENCE VOLTAGE
vs. REFERENCE CURRENT
1.252
1.250
1.248
1.246
1.244
1.242
1.240
1.238
0 10 20 30 40 50 60 70 80
REFERENCE CURRENT (µA)
START-UP VOLTAGE vs. LOAD CURRENT
(VOUT = 3.3V, PWM MODE)
2.0
1.8
1.6
1.4
TA = -40°C
1.2
1.0
0.8
0.6
0.01
TA = +85°C
TA = +25°C
0.1
1
10 100 1000
LOAD CURRENT (mA)
ADC LINEARITY ERROR
vs. FULL-SCALE INPUT VOLTAGE
0.25
0.15
0.05
AIN2
-0.05
AIN1
-0.15
-0.25
0.1875
0.4375
0.6875
0.9375
FULL-SCALE INPUT VOLTAGE (V)
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