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參數(shù)資料
| 型號： | MAX668-MAX669 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | 1.8V to 28V Input, PWM Step-Up Controllers in レMAX |
| 中文描述： | 1.8V至28V輸入，PWM升壓控制器在レ最大 |
| 文件頁數(shù)： | 3/18頁 |
| 文件大?。?/td> | 326K |
| 代理商： | MAX668-MAX669 |
V
M
1.8V to 28V Input, PWM Step-Up
Controllers in μMAX
_______________________________________________________________________________________
3
70
100
500
SYNC Input Frequency Range
SYNC/
SHDN
Falling Edge to Shutdown Delay
2
5
EXT high or low
EXT On-Resistance
1
EXT forced to 2V
EXT Sink/Source Current
1.5
1.8V < V
CC
< 3.0V (MAX669)
3.0V < V
CC
< 28V
A
SYNC/
SHDN
Input High Voltage
0.30
3.0
6.5
1.8V < V
CC
< 3.0V (MAX669)
SYNC/
SHDN
= 5V
SYNC/
SHDN
= 28V
μA
SYNC/
SHDN
Input Low Voltage
0.5
1.5
SYNC/
SHDN
Input Current
V
MIN
87
86
TYP
90
90
MAX
93
94
CONDITIONS
PARAMETER
μs
kHz
UNITS
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= LDO = +5V, R
OSC
= 200k
, T
A
= 0°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.)
ELECTRICAL CHARACTERISTICS
(V
CC
= LDO = +5V, R
OSC
= 200k
, T
A
= -40°C to +85°C, unless otherwise noted.) (Note 2)
2.40
2.60
Sensed at LDO, falling edge,
hysteresis = 1%, MAX669 only
LDO Undervoltage Lockout Threshold
2.65
5.50
3V
≤
V
CC
≤
28V
(includes LDO dropout)
4.50
5.50
5V
≤
V
CC
≤
28V
(includes LDO dropout)
LDO Output Voltage
Reference and LDO Regulators
REFERENCE AND LDO REGULATORS
V
3
28
28
MAX668
MAX669
V
PWM CONTROLLER
Input Voltage Range, V
CC
6
SYNC/
SHDN
= GND, V
CC
= 28V
Shutdown Supply Current (V
CC
)
350
V
FB
= 1.30V, V
CC
= 3V to 28V
μA
V
CC
Supply Current (Note 1)
1
CS+ forced to GND
μA
CS+ Input Current
3
27
μA
Idle Mode Current-Sense Threshold
2.7
1.22
5.5
1.28
20
115
mV
Input Voltage Range with V
CC
Tied to LDO
FB Threshold
FB Input Current
Current-Limit Threshold
mV
V
FB
= 1.30V
nA
85
V
MIN
MAX
CONDITIONS
V
PARAMETER
V
UNITS
86
90
290
94
R
OSC
= 500k
±1%
LDO load =
∞
to 400
1.8
3.0V < V
CC
< 28V
2.0
0.45
V
200
Not tested
SYNC Input Rise/Fall Time
ns
50
200
Minimum SYNC Input Low Pulse Width
ns
20
45
Minimum SYNC Input-Pulse Duty Cycle
%
Minimum EXT Pulse Width
ns
R
OSC
= 200k
±1%
R
OSC
= 100k
±1%
Maximum Duty Cycle
%
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