LTC1778EGN#PBF

Linear Technology**Linear Technology** 的外部电源开关降压控制器覆盖了各种输入和输出电压，带电流模和压模拓扑。 LTC 的降压直流到直流控制器可用于多种应用，包括手机、无线调制解调器、便携式计算机、电池供电设备、汽车、重型设备和工业控制系统。 _一些设备可能具有：_ 多相操作和输出追踪 易于与外部时钟同步 ### 开关电压调节器，Linear Technology**Linear Technology** 的同步型和非同步型内部开关调节器 IC 产品系列效率高、输入电压范围广、且开关频率高达 4 MHz。 该系列控制器包括多种配置：从降压（下降），升压（上压）、降压-升压、正向、隔离、反相和反激控制器。 反激、正向和隔离控制器（一次侧和二次侧）提供解决方案，帮助更换背板型电源转换中使用的直流/直流砖型转换器。

The is a synchronous step-down Switching Regulator Controller optimized for CPU power. The controller uses valley current control architecture to deliver very low duty cycles with excellent transient response without requiring a sense resistor. Operating frequency is selected by an external resistor and is compensated for variations in VIN. Discontinuous mode operation provides high efficiency operation at light loads. A forced continuous control pin reduces noise and RF interference and can assist secondary winding regulation by disabling discontinuous operation when the main output is lightly loaded. Fault protection is provided by internal foldback current limiting, an output overvoltage comparator and optional short-circuit shutdown timer. Soft-start capability for supply sequencing is accomplished using an external timing capacitor. The regulator current limit level is user programmable.

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No sense resistor required

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True current mode control

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Optimized for high step-down ratios

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Extremely fast transient response

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Stable with ceramic COUT

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Dual N-channel MOSFET synchronous drive

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Adjustable current limit

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Adjustable switching frequency

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Programmable soft-start

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Output overvoltage protection

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IQ <30µA Micropower shutdown