Linear LT3509双路36V降压开关稳压器应用方案
linear lt3509双路36v降压开关稳压器应用方案
linear 公司的lt3509是双路3.6v-36v电流模式降压开关稳压器,每路的内部开关能提供700ma的输出电流,集成了过压关闭和逐个周期的电流限制以及热关断等保护措施.最大占空比达95%,开关频率从300khz到2.2mhz可调整,可采用小型电感和陶瓷电容. lt3509主要应用在汽车电子,工业控制,网络设备和cpu,dsp或fpga的电源.本文介绍了lt3509的主要特性,功能方框图以及三种典型应用电路.
the lt3509 is a dual, current mode, step-down switching regulator, with internal power switches each capable of providing 700ma output current. this regulator provides a compact and robust solution for multi-rail systems in harsh environments. it incorporates several protection features including overvoltage lockout and cycle-by-cycle current limit. thermal shutdown provides additional protection.
the loop compensation components and the boost diodes are integrated on-chip. switching frequency is set by a single external resistor. external synchronization is also
possible. the high maximum switching frequency allows the use of small inductors and ceramic capacitors for low ripple. constant frequency operation above the am band avoids interference with radio reception, making the lt3509 well suited for automotive applications. each regulator has an independent shutdown and soft-start control pin.
when both converters are powered down, the common circuitry enters a low current shutdown state.
lt3509主要特性:
two 700ma switching regulators with internal power switches
wide 3.6v to 36v operating range
overvoltage lockout protects circuit through 60v supply transients
short-circuit robust
low dropout voltage—95% maximum duty cycle
adjustable 300khz to 2.2mhz switching frequency synchronizable over the full range
uses small inductors and ceramic capacitors
integrated boost diodes
internal compensation
thermally enhanced 14-lead (4mmx3mm) dfn and 16 lead msop packages
lt3509应用:
automotive electronics
industrial controls
wall transformer regulation
networking devices
cpu, dsp, or fpga power
图1.lt3509功能方框图
图2.lt3509应用电路(1):3.3v和5v双输出降压转换器
图3.lt3509应用电路(2):1.8v和3.3v输出,同步于300khz-600khz
图4.lt3509应用电路(3):汽车应用的5v逻辑电源和8v lcd电源
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linear 公司的lt3509是双路3.6v-36v电流模式降压开关稳压器,每路的内部开关能提供700ma的输出电流,集成了过压关闭和逐个周期的电流限制以及热关断等保护措施.最大占空比达95%,开关频率从300khz到2.2mhz可调整,可采用小型电感和陶瓷电容. lt3509主要应用在汽车电子,工业控制,网络设备和cpu,dsp或fpga的电源.本文介绍了lt3509的主要特性,功能方框图以及三种典型应用电路.
the lt3509 is a dual, current mode, step-down switching regulator, with internal power switches each capable of providing 700ma output current. this regulator provides a compact and robust solution for multi-rail systems in harsh environments. it incorporates several protection features including overvoltage lockout and cycle-by-cycle current limit. thermal shutdown provides additional protection.
the loop compensation components and the boost diodes are integrated on-chip. switching frequency is set by a single external resistor. external synchronization is also
possible. the high maximum switching frequency allows the use of small inductors and ceramic capacitors for low ripple. constant frequency operation above the am band avoids interference with radio reception, making the lt3509 well suited for automotive applications. each regulator has an independent shutdown and soft-start control pin.
when both converters are powered down, the common circuitry enters a low current shutdown state.
lt3509主要特性:
two 700ma switching regulators with internal power switches
wide 3.6v to 36v operating range
overvoltage lockout protects circuit through 60v supply transients
short-circuit robust
low dropout voltage—95% maximum duty cycle
adjustable 300khz to 2.2mhz switching frequency synchronizable over the full range
uses small inductors and ceramic capacitors
integrated boost diodes
internal compensation
thermally enhanced 14-lead (4mmx3mm) dfn and 16 lead msop packages
lt3509应用:
automotive electronics
industrial controls
wall transformer regulation
networking devices
cpu, dsp, or fpga power
图1.lt3509功能方框图
图2.lt3509应用电路(1):3.3v和5v双输出降压转换器
图3.lt3509应用电路(2):1.8v和3.3v输出,同步于300khz-600khz
图4.lt3509应用电路(3):汽车应用的5v逻辑电源和8v lcd电源
原生安卓，诺基亚9王者归来
AAIH联盟正式成立，推进人工智能在医疗领域的应用
MC56F83789数字信号控制器介绍
全国首例！301医院云HIS系统国产化上线
大功率可调开关电源关键设计
Linear LT3509双路36V降压开关稳压器应用方案
plc位逻辑指令的用法
MT8183核心板 联发科MTK8183智能模块参数
医疗连接器引脚和插座设计考虑指南
笔记本每日一贴——外挂光驱盒
圆柱电池分选机的技术参数
一种兼容110/220V输出的逆变器控制方法
六轴力/六维力传感器在工业、科研、医疗等领域的广泛应用
PCB版图布局的阻抗线宽的计算
电动牙刷怎么实现防水透气
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小蚁4K+运动相机售价公布：1999元，月底开售
电动机不同启动方式有何不一样？
RFTOP定制款1.85mm双母头毫米波隔直器-RB0167FF
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