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英文描述:
The LT®3685 is an adjustable frequency (200kHz to 2.4MHz)
monolithic step-down switching regulator that accepts
input voltages up to 38V operating and 60V maximum. An
internal overvoltage protection circuit turns off the power
switch when VIN is above 38V t*ical (36V minimum) which
then allows the part to safely withstand 60V transients. A
high effi ciency 0.25 switch is included on the die along
with a boost Schottky diode and the necessary oscillator,
control, and logic circuitry. Current mode *ology is
used for fast transient response and good loop stability.
The LT3685’s high operating frequency allows the use of
*all, low cost inductors and ceramic capacitors resulting
in low output ripple while keeping total solution size
to a minimum. The low current shutdown mode reduces
input supply current to less than 1μA while a resistor and
capacitor on the RUN/SS pin provide a controlled output
voltage ramp (soft-start). A power good fl ag signals when
VOUT reaches 89% of the programmed output voltage. The
LT3685 is available in 10-Pin MSOP and 3mm × 3mm DFN
中文描述:在LT ® 3685是一个可调频率(200kHz至2.4MHz)
单片降压开关稳压器,接受
输入电压*38V的操作和60V*大值。一个
内部过电压保护电路关闭电源
当VIN高于38V的开关典型(36V的*小)是哪个
然后允许部分*地承受60V的瞬态电压。一
高effi ciency 0.25开关芯片上包含沿
加上升压肖特基二*管和*需的振荡器,
控制和逻辑电路。电流模式拓扑结构
用于快速瞬态响应和环路稳定性好。
该LT3685的高工作频率允许使用
小型,*电感器和陶瓷电容器产生
在低输出纹波,同时保持整体解决方案尺寸
到限度。低电流关断模式可
输入电源电流降*1μA以下,而一个电阻和
电容上的RUN / SS引脚提供一个受控的输出
电压斜坡(软启动)。一个电源良好信号时,佛罗里达州股份公司
VOUT的*89%的编程输出电压。该
LT3685是采用10引脚MSOP和3mm × 3mm DFN封装
公司:楚望科技(香港)有限公司
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