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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)： | 2/18頁 |
| 文件大?。?/td> | 343K |
| 代理商： | MAX8545 |
M
Low-Cost, Wide Input Range, Step-Down
Controllers with Foldback Current Limit
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
(All voltages referenced to GND unless otherwise noted.)
V
IN
to GND ............................................................-0.3V to +30V
V
CC
to GND .............................-0.3V, lower of 6V or (VL + 0.3V)
FB to GND................................................................-0.3V to +6V
BST to GND............................................................-0.3V to +36V
VL, DL, COMP to GND ..............................-0.3V to (V
CC
+ 0.3V)
BST to LX..................................................................-0.3V to +6V
DH to LX....................................................-0.3V to (V
BST
+ 0.3V)
VL Short to GND ......................................................................5s
ELECTRICAL CHARACTERISTICS
(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.)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
LX to GND ......................................................................0 to 30V
Input Current (any pin) .....................................................±50mA
Continuous Power Dissipation (T
A
= +70°C)
10-Pin μMAX (derate 5.6mW/°C above +70°C)..........444mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
PARAMETER
SYMBOL
CONDITIONS
MIN
4.9
2.7
TYP
MAX
28.0
5.5
UNITS
V
CC
= VL, V
IN
separate from V
CC
V
IN
= VL = V
CC
V
IN
Operating Range
V
IN
V
V
IN
Undervoltage Lockout
(UVLO) Trip Level
Rising and falling edge, hysteresis = 2%
2.35
2.50
2.66
V
V
IN
Operating Supply Current
V
FB
= 0.88V (no switching)
5.5V < V
IN
< 28V, V
CC
= VL,
1mA < I
LOAD
< 25mA
0.7
1.2
mA
VL Output Voltage
4.7
5
5.3
V
Thermal Shutdown
Rising temperature, typical
hysteresis = 10
°
C (Note 1)
+160
°
C
OSCILLATOR
MAX8545, MAX8546
MAX8548
DH output, MAX8545, MAX8546
MAX8548
DH output, MAX8545, MAX8546
MAX8548
250
80
300
100
360
120
5
10
Frequency
f
OSC
kHz
Minimum Duty Cycle
DC
MIN
%
83
90
86
95
Maximum Duty Cycle
DC
MAX
%
SOFT-START
MAX8545, MAX8546
MAX8548
MAX8545, MAX8546
MAX8548
6.6
10.2
Digital Ramp Period
ms
V
OUT
/ 64
V
OUT
/ 32
Soft-Start Levels
V
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX8545EUB | 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)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(fēng)格: 封裝 / 箱體:CPAK |
| MAX8545EUB+ | 功能描述:電壓模式 PWM 控制器 Wide Input Range Step-Down Controller RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓?fù)浣Y(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel |
| MAX8545EUB+T | 功能描述:電壓模式 PWM 控制器 Wide Input Range Step-Down Controller RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓?fù)浣Y(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel |
| MAX8545EUB-T | 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)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(fēng)格: 封裝 / 箱體:CPAK |
| 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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