Datasheet

MAX1960/MAX1961/MAX1962
2.35V to 5.5V, 0.5% Accurate, 1MHz PWM
Step-Down Controllers with Voltage Margining
_______________________________________________________________________________________ 7
FREQUENCY vs. TEMPERATURE
MAX1960 toc09
TEMPERATURE (°C)
FREQUENCY (kHz)
603510-15
100
200
300
400
500
600
700
800
900
1000
1100
0
-40 85
FSET/SYNC = V
CC
FSET/SYNC = GND
CHARGE-PUMP OUTPUT VOLTAGE
vs. CHARGE-PUMP LOAD CURRENT, 1MHz
MAX1960 toc10
CHARGE-PUMP LOAD CURRENT (mA)
CHARGE-PUMP OUTPUT VOLTAGE (V)
15010050
4.6
4.7
4.8
V
IN
= 3.3V
V
IN
= 2.5V
4.9
5.0
5.1
5.2
4.5
0 200
C1 = 0.47µF
C6 = 2.2µF
CHARGE-PUMP OUTPUT VOLTAGE
vs. CHARGE-PUMP LOAD CURRENT, 500kHz
MAX1960 toc11
CHARGE-PUMP LOAD CURRENT (mA)
CHARGE-PUMP OUTPUT VOLTAGE (V)
15010050
4.6
4.7
4.8
V
IN
= 3.3V
V
IN
= 2.5V
4.9
5.0
5.1
5.2
4.5
0200
C1 = 1µF
C6 = 4.7µF
TRIPLER CHARGE-PUMP OUTPUT VOLTAGE
vs. CHARGE-PUMP LOAD CURRENT, 1MHz
MAX1960 toc12
CHARGE-PUMP LOAD CURRENT (mA)
CHARGE-PUMP OUTPUT VOLTAGE (V)
302010
4.6
4.7
4.8
4.9
5.0
5.1
5.2
4.5
04050
V
IN
= 2.5V
CIRCUIT OF FIGURE 12
C10, C11, C12 = 0.47µF
C6 = 2.2µF
TRIPLER CHARGE-PUMP OUTPUT VOLTAGE
vs. CHARGE-PUMP LOAD CURRENT, 500kHz
MAX1960 toc13
CHARGE-PUMP LOAD CURRENT (mA)
CHARGE-PUMP OUTPUT VOLTAGE (V)
302010
4.6
4.7
4.8
4.9
5.0
5.1
5.2
4.5
04050
V
IN
= 2.5V
C10, C11, C12 = 1µF
C6 = 4.7µF
CIRCUIT OF FIGURE 12
MAX1960/MAX1961
CURRENT-LIMIT THRESHOLD
VOLTAGE vs. TEMPERATURE
MAX1960 toc14
TEMPERATURE
(
°C
)
CURRENT-LIMIT THRESHOLD VOLTAGE (mV)
603510-15
100
50
150
200
250
300
350
0
-40 85
R
ILIM
= 390kΩ
ILIM = V
DD
MAX1962
CURRENT-LIMIT THRESHOLD
VOLTAGE vs. TEMPERATURE
MAX1960 toc15
TEMPERATURE (°C)
CURRENT-LIMIT THRESHOLD VOLTAGE (mV)
603510-15
47.5
48.0
48.5
49.0
49.5
50.0
50.5
51.0
51.5
52.0
47.0
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Typical Operating Characteristics (continued)
(Circuit of Figure 9, T
A
= +25°C, unless otherwise noted.)