MAX1961 Просмотр технического описания (PDF) - Maxim Integrated
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MAX1961
Maxim Integrated
MAX1961 Datasheet PDF : 29 Pages
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2.35V to 5.5V, 0.5% Accurate, 1MHz PWM
Step-Down Controllers with Voltage Margining
Typical Operating Characteristics (continued)
(Circuit of Figure 9, TA = +25°C, unless otherwise noted.)
FREQUENCY vs. TEMPERATURE
1100
1000
900
FSET/SYNC = VCC
800
700
600
500
400
300
200
FSET/SYNC = GND
100
0
-40 -15
10
35
60
85
TEMPERATURE (°C)
CHARGE-PUMP OUTPUT VOLTAGE
vs. CHARGE-PUMP LOAD CURRENT, 1MHz
5.2
C1 = 0.47µF
5.1
C6 = 2.2µF
5.0
4.9
VIN = 3.3V
4.8
4.7
VIN = 2.5V
4.6
4.5
0
50
100
150
200
CHARGE-PUMP LOAD CURRENT (mA)
CHARGE-PUMP OUTPUT VOLTAGE
vs. CHARGE-PUMP LOAD CURRENT, 500kHz
5.2
C1 = 1µF
5.1
C6 = 4.7µF
5.0
4.9
4.8
4.7
4.6
VIN = 2.5V
VIN = 3.3V
4.5
0
50
100
150
200
CHARGE-PUMP LOAD CURRENT (mA)
TRIPLER CHARGE-PUMP OUTPUT VOLTAGE
vs. CHARGE-PUMP LOAD CURRENT, 1MHz
5.2
C10, C11, C12 = 0.47µF
5.1
C6 = 2.2µF
TRIPLER CHARGE-PUMP OUTPUT VOLTAGE
vs. CHARGE-PUMP LOAD CURRENT, 500kHz
5.2
C10, C11, C12 = 1µF
5.1
C6 = 4.7µF
5.0
5.0
4.9
VIN = 2.5V
4.8
4.9
VIN = 2.5V
4.8
4.7
4.7
4.6
CIRCUIT OF FIGURE 12
4.5
0
10
20
30
40
50
CHARGE-PUMP LOAD CURRENT (mA)
4.6
CIRCUIT OF FIGURE 12
4.5
0
10
20
30
40
50
CHARGE-PUMP LOAD CURRENT (mA)
MAX1960/MAX1961
CURRENT-LIMIT THRESHOLD
VOLTAGE vs. TEMPERATURE
350
300
RILIM = 390kΩ
250
200
150
100
ILIM = VDD
50
0
-40 -15
10
35
60
85
TEMPERATURE (°C)
MAX1962
CURRENT-LIMIT THRESHOLD
VOLTAGE vs. TEMPERATURE
52.0
51.5
51.0
50.5
50.0
49.5
49.0
48.5
48.0
47.5
47.0
-40 -15
10
35
60
85
TEMPERATURE (°C)
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