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MAX8543, MAX8544
降压型控制器，具有预偏置启动、无损检测、同步整流和OVP
概述
完整的数据资料
(PDF, 440kB) 英文
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MAX8543/MAX8544电流模式、恒定频率PWM buck控制器工作于3V至13.2V的输入电源范围，产生可调节的0.8V至0.9 x VIN 输出电压，负载电流可达25A。它们的开关频率可调节，并具有适用于噪声敏感应用的同步整流功能。有关PowerMind™的更多信息。
关键特性
应用/使用
预偏置启动/单调
1%的输出精确度
可使用陶瓷、聚合或电解电容
200kHz至1MHz可调节频率
160kHz至1.2MHz同步整流
无损，折返式限流
过压保护
使能(开/关)
可调节软启动
MAX8544
Key Specifications:
Step-Down Switching Regulators
Part Number
VIN (min) (V)
VIN (max) (V)
Min. VOUT (V)
Max. VOUT (V)
IOUT (A)
Output Adj. Method
Operating Current, ICC (max) (mA)
Number of DC-DC Outputs
Operating Freq. (kHz)
Features
EV-Kit
Package
RoHS Available
Operating Temp. Range (°C)
Price**
MAX8543
3
13.2
0.8
11
25
Resistor
3
1
1000
• External Synchronization
• Fixed Frequency/ PWM Operation
• Output Overvoltage Protection
Yes
QSOP/16
Yes
-40 to +85
$1.05 @ 1k
MAX8544
• External Synchronization
• Fixed Frequency/ PWM Operation
• Low Battery/ Power OK Output
• Output Overvoltage Protection
QSOP/20
$1.22 @ 1k
See All Step-Down Switching Regulators (223)
Key Specifications:
Switch-Mode DC-DC Power Supplies
Part Number
Topology
VIN (min) (V)
VIN (max) (V)
Number of DC-DC Outputs
Digital/VID Programmed Output
Min. Adjustable VOUT (V)
Max. Adjustable VOUT (V)
IOUT (A)
Operating Current, ICC (max) (mA)
Operating Freq. (kHz)
Internal Power Switch(es)
Package
Price**
MAX8543
Step-Down
3
13.2
1
No
0.8
11
25
3
1000
No
QSOP/16
$1.05 @ 1k
MAX8544
QSOP/20
$1.22 @ 1k
See All Switch-Mode DC-DC Power Supplies (429)
Notes:
** This pricing is BUDGETARY, for comparing similar parts. Prices are in
U.S. dollars and subject to change. Quantity pricing may vary
substantially and international prices may differ due to local
duties, taxes, fees, and exchange rates. For volume-specific prices
and delivery, please see the price and availability page
or contact an authorized distributor.
图表
典型工作电路
参考文献： 19-3155;
Rev. 0;
2004-05-26
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