參數(shù)資料
型號： MAX8545
廠商： Maxim Integrated Products, Inc.
英文描述： Low-Cost. Wide Input Range. Step-Down Controllers with Foldback Current Limit
中文描述： 低成本、寬輸入范圍、降壓型控制器，帶有折返式限流
文件頁數(shù)： 3/18頁
文件大?。?/td> 343K
代理商： MAX8545
M
Low-Cost, Wide Input Range, Step-Down
Controllers with Foldback Current Limit
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= V
L
= V
CC
= 5V, T
A
= -40
°
C to +85
°
C, unless otherwise noted. Typical values are at T
A
= +25
°
C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
ERROR AMPLIFIER
2.7V < V
CC
< 5.5V, 0
°
C to +85
°
C
2.7V < V
CC
< 5.5V, -40
°
C to +85
°
C
0.787
0.782
0.800
0.800
4000
0.815
0.815
FB Regulation Voltage
V
FB to COMP/EN Gain
V / V
FB to COMP/EN
Transconductance
-5μA < I
COMP/EN
< +5μA
70
108
160
μS
FB Input Bias Current
COMP/EN Source Current
V
FB
= 0.88V
V
COMP/EN
= 0V
LX to GND, MAX8545, MAX8548,
V
FB
= 0.8V
LX to GND MAX8546, V
FB
= 0.8V
LX to GND, V
FB
= 0V,
MAX8545, MAX8548
1
46
2
μA
μA
15
100
-355
-320
-280
Current-Limit Threshold Voltage
(Across Low-Side MOSFET)
-185
-165
-140
mV
-105
-75
-45
Foldback Current-Limit Threshold
Voltage (Across Low-Side
MOSFET) When Output is Short
MAX8546, LX to GND, V
FB
= 0
-53
-38
-22
mV
MOSFET DRIVERS
Rising edge, DH going low to DL going high
Falling edge, DL going low to DH going high
96
28
1.6
2.5
1.1
2.5
0
33
Break-Before-Make Time
ns
DH On-Resistance in Low State
DH On-Resistance in High State
DL On-Resistance in Low State
DL On-Resistance in High State
BST Leakage Current
LX Leakage Current
4
μA
μA
5.5
2.5
5.5
50
100
V
BST
= 33V, V
LX
= 28V, V
FB
= 0.88V
V
BST
= 33V, V
LX
= 28V, V
FB
= 0.88V
Note 1:
Thermal shutdown disables the buck regulator when the die reaches this temperature. Soft-start is reset but the VL regulator
remains on.
相關PDF資料
PDF描述
MAX8546 Low-Cost. Wide Input Range. Step-Down Controllers with Foldback Current Limit
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相關代理商/技術參數(shù)
參數(shù)描述
MAX8545EUB 功能描述:DC/DC 開關控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK
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MAX8545EUB-TG069 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述:
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