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MAX5073
2.2MHz、双输出、buck或boost转换器,内置功率MOSFET
概述
完整的数据资料
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MAX5073双输出DC-DC转换器,集成高边n沟道功率MOSFET。各路输出可单独设置为buck或boost转换器。器件可工作在5.5V至23V宽电压输入范围。在buck模式,各路输出可编程为低至0.8V,boost模式可高达28V,输出电压精度可达±1%。Buck模式下,转换器1和转换器2分别可输出2A和1A电流。各转换器的开关频率可在200kHz至2.2MHz之间编程,以避免无线设备中的差拍干扰并减小供电电源的尺寸。两路输出工作在180°异相模式,可降低输入电容的波纹电流、尺寸和成本。SYNC输入简化了外部频率同步。并且,CLKOUT输出为第2个转换器提供异相时钟,在主从配置中,可采用两片MAX5073 IC实现四相工作。
MAX5073包括内部数字软启动功能,可降低输入浪涌电流,避免输出电压过冲,确保上电过程中输出电压单调上升。各转换器可单独关断,带有电源就绪输出。保护功能包括buck模式输出短路保护,以及boost模式最大占空比限制和过热关断。
MAX5073提供热增强型28引脚薄型QFN封装,在+70°C环境温度中可耗散2.7W功率。器件额定工作于-40°C至+85°C扩展级温度范围。
关键特性
应用/使用
4.5V至5.5V或5.5V至23V输入电压范围
0.8V (buck)至28V (boost)输出电压
两个独立输出的DC-DC转换器,带有内部功率MOSFET
各路输出可单独配置为buck或boost模式
降压模式下,IOUT1 和IOUT2 分别为2A和1A
180°异相工作
时钟输出用于四相工作
开关频率可编程为200kHz至2.2MHz
数字软启动和同步输入
独立的转换关断和电源就绪输出
短路保护(buck)/最大占空比限制(boost)
过热关断
热增强型28引脚薄型QFN封装,+70°C时可耗散2.7W功率
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
Industry Qualified
Package
RoHS Available
Operating Temp. Range (°C)
Price**
MAX5073
5.5
23
0.8
28
2
Resistor
4
2
2200
Dual/Multi-Phase Controller
External Synchronization
Fixed Frequency/ PWM Operation
Low Battery/ Power OK Output
Yes
Automotive - AECQ100
Automotive - General
THIN QFN/28
THIN QFN/32
Yes
-40 to +85
$1.71 @ 1k
See All Step-Down Switching Regulators (223)
Key Specifications:
Step-Up 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
Industry Qualified
Package
RoHS Available
Operating Temp. Range (°C)
Price**
MAX5073
5.5
23
0.8
28
2
Resistor
4
2
2200
Dual/Multi-Phase Controller
External Synchronization
Fixed Frequency/ PWM Operation
Low Battery/ Power OK Output
Yes
Automotive - AECQ100
Automotive - General
THIN QFN/28
THIN QFN/32
Yes
-40 to +85
$1.71 @ 1k
See All Step-Up Switching Regulators (89)
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)
Industry Qualified
Package
Price**
MAX5073
Step-Down
Step-Up
5.5
23
2
No
0.8
28
2
4
2200
Yes
Automotive - AECQ100
Automotive - General
THIN QFN/28
THIN QFN/32
$1.71 @ 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.
参考文献: 19-3504;
Rev. 2;
2006-03-10
本页最后一次更新: 2007-02-09
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