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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)： | 7/18頁 |
| 文件大?。?/td> | 343K |
| 代理商： | MAX8545 |
M
Low-Cost, Wide Input Range, Step-Down
Controllers with Foldback Current Limit
_______________________________________________________________________________________
7
Pin Description
PIN
NAME
FUNCTION
1
COMP/EN
Compensation Input. Pull COMP/EN low with an open-collector or open-drain device to turn
off the output.
2
FB
Feedback Input. Connect a resistive-divider network to set V
OUT
. FB threshold is 0.8V.
3
V
CC
Internal Chip Supply. Connect V
CC
to VL through a 10
resistor. Bypass V
CC
to GND with at
least a 0.1μF ceramic capacitor.
4
V
IN
Power Supply for LDO Regulator for V
IN
> 5.5V, and Chip Supply for V
IN
< 5.5V. Bypass V
IN
with
at least a 1μF ceramic capacitor to GND.
5
VL
Output of Internal 5V LDO. Connect VL to V
IN
for V
IN
< 5.5V. Bypass VL with at least a 1μF ceramic
capacitor to GND.
6
DL
Low-Side External MOSFET Gate-Driver Output. DL swings from VL to GND.
7
GND
Ground and Negative Current-Sense Input
8
LX
Inductor Switching Node. LX is used for both current limit and the return supply of the DH driver.
9
DH
High-Side External MOSFET Gate-Driver Output. DH swings from BST to LX.
10
BST
Positive Supply of DH Driver. Connect a 0.1μF ceramic capacitor between BST and LX.
V
IN
VL
FB
BST
DH
LX
V
CC
COMP/EN
5V LINEAR
REGULATOR
RAMP
GENERATOR
MAX8545
MAX8546
MAX8548
1V
PWM COMP
ERROR
AMPLIFIER
800mV
REF
SOFT-START
INTERNAL
CHIP SUPPLY
100kHz/
300kHz*
CLOCK
GENERATOR
*SEE SELECTOR GUIDE
CONTROL
LOGIC
TEMPERATURE
SHUTDOWN
DL
GND
FOLD-
BACK
FB
CURRENT-LIMIT
COMPARATOR
Functional Diagram
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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 拓撲結(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 拓撲結(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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