MT2445AD Description/概述：
The MT2445AD is a wide input range, highefficiency, synchronous step-down switching regulator, capable of delivering up to 0.8A of output current. With a fixed switching frequency of 600KHz,this current mode PWM controlled converter allows the use of small external components, such as ceramic input and output caps, as well as small inductors.
MT2445AD also employs a proprietary control scheme that switches the device into a power save mode during light load, thereby extending the range of high efficiency operation. making it an ideal solution for industrial applications such as smart meters as well as automotive applications. In automotive systems, power comes from the battery, with its voltage typically between 9V and 24V. Including cold crank and double battery jump-starts, the minimum input voltage may be as low as 5V and the maximum up to 40V, with even higher transient voltages. With these high input voltages, linear regulators cannot be used for high supply currents without overheating the regulator. Instead, high efficiency switching regulators such as MT2445AD must be used to minimize thermal dissipation.
MT2445AD is available SOT23-6 Packages.
MT2445AD是一個寬輸入范圍，高效率，同步降壓開關(guān)調(diào)節(jié)器，能夠提供高達0.8A的輸出電流。這種電流模式PWM控制的轉(zhuǎn)換器的固定開關(guān)頻率為600 KHz，允許使用小的外部組件，如陶瓷輸入和輸出帽，以及小的電感器。
MT2445AD還采用了一種專有的控制方案，在輕負載期間將設(shè)備切換到節(jié)能模式，從而擴大了高效運行的范圍。使其成為智能電表和汽車應(yīng)用等工業(yè)應(yīng)用的理想解決方案。在汽車系統(tǒng)中，電力來自電池，其電壓通常在9V到24V之間。包括冷曲柄和雙電池跳動，最小輸入電壓可低至5V，最大可達40V，甚至有更高的瞬態(tài)電壓。在這些高輸入電壓下，線性調(diào)節(jié)器不能用于高供電電流而不過的調(diào)節(jié)器。相反，必須使用像MT2445AD這樣的高效開關(guān)調(diào)節(jié)器來盡量減少散熱。
MT2445AD可提供SOT23-6軟件包。
MT2445AD Features/特性：
High Efficiency at 12 In 3.3V Out Up to 92%
600KHz Frequency Operation
0.8A Output Current
No Schottky Diode Required
5V to 40V Input Voltage Range
0.8V Reference
Slope Compensated Current Mode Control for Excellent Line and Load Transient Response
Integrated internal compensation
Stable with Low ESR Ceramic Output Capacitors
Thermal Shutdown and UVLO
Inrush Current Limit and Soft Start
Available in SOT23-6 Package
-40°C to +85°C Temperature Range
MT2445AD Applications/應(yīng)用：
Small Meters
Industrial Applications
Automotive Applications
Flat Panel Television and Monitors
Wireless and DSL Modems
Notebook Computer
MT2445AD Typical Application：
MT2445AD Package/Order Information：
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Order Part Number
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Package
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Top Marking
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MT2445AD
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SOT23-6
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A06VDC
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MT2445AD Pin Description：
MT2445AD Functional Block Diagram：
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