基于ISL8088的高效2.25MHz降压电源设计方案
基于isl8088的高效2.25mhz降压电源设计方案
intersil 公司的isl8088是双路800ma低静态电流高效2.25mhz同步降压电源稳压器，电源电压从2.75v到5.5v，工作频率2.25mhz，可使用小型低成本电感和电容，每路输出电压可低至0.6v，主要应用在dc/dc pol模块，μc/μp, fpga和dsp电源，路由器和交换机的插入dc/dc模块，测试和测量系统，锂离子电池和条形码阅读器。本文介绍isl8088主要特性，方框图，应用电路，以及isl8088 eval1z评估板主要特性，电路图和所用材料清单。
dual 800ma low quiescent current 2.25mhz high efficiency synchronous buck regulator
the isl8088 is a high efficiency, dual synchronous step-down dc/dc regulator that can deliver up to 800ma continuous output current per channel. the supply voltage range of 2.75v to 5.5v allows the use of a single li+ cell, three nimh cells or a regulated 5v input. the current mode control architecture enables very low duty cycle operation at high frequency with fast transient response and excellent loop stability. the isl8088 operates at 2.25mhz switching frequency allowing the use of small, low cost inductors and capacitors. each channel is optimized for generating an output voltage as low as 0.6v.
the isl8088 has a user configurable mode of operation-forced pwm mode and pfm/pwm mode. the forced pwm mode operation reduces noise and rf interference while the pfm mode operation provides high efficiency by reducing switching losses at light loads. in pfm mode of operation, both channels draw a total quiescent current of only 30μa hence enabling high light load efficiency in order to maximize battery life.
the isl8088 offers a 1ms power-good (pg) to monitor both output at power-up. when shutdown, isl8088 discharges the outputs capacitor. other features include internal digital soft-start, enable for power sequence, overcurrent protection, and thermal shutdown. the isl8088 is offered in a 3mmx3mm 10 ld dfn package with 1mm maximum height. the complete converter occupies less than 1.8cm2 area.
isl8088主要特性：
• internal current mode compensation
• 100% maximum duty cycle for lowest dropout
• selectable forced pwm mode and pfm mode
• external synchronization up to 4mhz
• start-up with pre-biased output
• soft-stop output discharge during disabled
• internal digital soft-start - 2ms
• power-good (pg) output with 1ms delay
isl8088应用：
• dc/dc pol modules
• μc/μp, fpga and dsp power
• plug-in dc/dc modules for routers and switchers
• test and measurement systems
• li-ion battery power devices
• bar code readers
图1。isl8088方框图
图2。isl8088典型应用电路图
isl8088 eval1z评估板
the isl8088 eval1z kit is intended for use by individuals with requirements for point-of-load applications sourcing from 2.75v to 5.5v. the isl8088eval1z evaluation board is used to demonstrate the performance of the isl8088 low quiescent current mode converter.
the isl8088 is offered in a 3mmx3mm 10 ld dfn package with 1mm maximum height. the complete converter occupies less than 1.8cm2 area.
isl8088 eval1z评估板主要特性：
• dual 800ma high efficiency synchronous buck regulator with up to 97% efficiency
• 800ma guaranteed output current per channel
• power-goods (pg) output with 1ms delay
• 2.75v to 5.5v supply voltage
• 3% output accuracy over-temperature/load/line
• start up with pre-biased output
• internal digital soft-start - 2ms
• soft-stop output discharge during disabled
• 30μa quiescent supply current in pfm mode
• selectable forced pwm mode and pfm mode
• external synchronization up to 4mhz
• typical 6.5μa logic controlled shutdown current
• 100% maximum duty cycle for lowest dropout
• internal current mode compensation
• peak current limiting.
• over-temperature protection
• independent enable
图3。isl8088 eval1z评估板电路图
isl8088 eval1z评估板材料清单：
苹果推送iOS/iPadOS 13.4.5第二个Beta版本 修复个人热点断连及不稳定等问题
什么是人工智能专业?为何如此热门
微软新专利曝光：使用宽带芯片与Apple MacBook竞争
别用“工匠精神”的浪漫，掩盖“工匠制度”的缺失
家用电器如何选择电线大小？了解线缆的几个参数
基于ISL8088的高效2.25MHz降压电源设计方案
iphone8什么时候上市？iphone8未发布就先涨价？64GB起步,有钱才是硬道理
朗科绝影固态硬盘：独立缓存搭配个性散热马甲，确保性能高速稳定
机器人泰迪熊的制作教程
微软披露全新Windows系统高危漏洞 被微软评为最高漏洞级别
三星在日本设先进芯片封装研究中心，瞄准先进封装市场
简单为大家讲解一下不出油低温热固胶技术
Mozilla宣布将停用Voice Fill和Firefox Voice Beta扩展
PCB布局：如何最好地布置PWM微控制器的电路
Somnium Space推出一款专为VR设计的全新3D角色扫描技术
手机到底需不需要安装杀毒软件
国产雄起！华为P9一年销量1200万部，华为Mate9四个月500万部
关于深度学习图像分类不得不说的技巧详解
三星Note 10边框掉漆事件，三星官方还没有任何回应
优派推出全新的VP系列高端摄影显示器VP2785-2K
intersil 公司的isl8088是双路800ma低静态电流高效2.25mhz同步降压电源稳压器，电源电压从2.75v到5.5v，工作频率2.25mhz，可使用小型低成本电感和电容，每路输出电压可低至0.6v，主要应用在dc/dc pol模块，μc/μp, fpga和dsp电源，路由器和交换机的插入dc/dc模块，测试和测量系统，锂离子电池和条形码阅读器。本文介绍isl8088主要特性，方框图，应用电路，以及isl8088 eval1z评估板主要特性，电路图和所用材料清单。
dual 800ma low quiescent current 2.25mhz high efficiency synchronous buck regulator
the isl8088 is a high efficiency, dual synchronous step-down dc/dc regulator that can deliver up to 800ma continuous output current per channel. the supply voltage range of 2.75v to 5.5v allows the use of a single li+ cell, three nimh cells or a regulated 5v input. the current mode control architecture enables very low duty cycle operation at high frequency with fast transient response and excellent loop stability. the isl8088 operates at 2.25mhz switching frequency allowing the use of small, low cost inductors and capacitors. each channel is optimized for generating an output voltage as low as 0.6v.
the isl8088 has a user configurable mode of operation-forced pwm mode and pfm/pwm mode. the forced pwm mode operation reduces noise and rf interference while the pfm mode operation provides high efficiency by reducing switching losses at light loads. in pfm mode of operation, both channels draw a total quiescent current of only 30μa hence enabling high light load efficiency in order to maximize battery life.
the isl8088 offers a 1ms power-good (pg) to monitor both output at power-up. when shutdown, isl8088 discharges the outputs capacitor. other features include internal digital soft-start, enable for power sequence, overcurrent protection, and thermal shutdown. the isl8088 is offered in a 3mmx3mm 10 ld dfn package with 1mm maximum height. the complete converter occupies less than 1.8cm2 area.
isl8088主要特性：
• internal current mode compensation
• 100% maximum duty cycle for lowest dropout
• selectable forced pwm mode and pfm mode
• external synchronization up to 4mhz
• start-up with pre-biased output
• soft-stop output discharge during disabled
• internal digital soft-start - 2ms
• power-good (pg) output with 1ms delay
isl8088应用：
• dc/dc pol modules
• μc/μp, fpga and dsp power
• plug-in dc/dc modules for routers and switchers
• test and measurement systems
• li-ion battery power devices
• bar code readers
图1。isl8088方框图
图2。isl8088典型应用电路图
isl8088 eval1z评估板
the isl8088 eval1z kit is intended for use by individuals with requirements for point-of-load applications sourcing from 2.75v to 5.5v. the isl8088eval1z evaluation board is used to demonstrate the performance of the isl8088 low quiescent current mode converter.
the isl8088 is offered in a 3mmx3mm 10 ld dfn package with 1mm maximum height. the complete converter occupies less than 1.8cm2 area.
isl8088 eval1z评估板主要特性：
• dual 800ma high efficiency synchronous buck regulator with up to 97% efficiency
• 800ma guaranteed output current per channel
• power-goods (pg) output with 1ms delay
• 2.75v to 5.5v supply voltage
• 3% output accuracy over-temperature/load/line
• start up with pre-biased output
• internal digital soft-start - 2ms
• soft-stop output discharge during disabled
• 30μa quiescent supply current in pfm mode
• selectable forced pwm mode and pfm mode
• external synchronization up to 4mhz
• typical 6.5μa logic controlled shutdown current
• 100% maximum duty cycle for lowest dropout
• internal current mode compensation
• peak current limiting.
• over-temperature protection
• independent enable
图3。isl8088 eval1z评估板电路图
isl8088 eval1z评估板材料清单：
苹果推送iOS/iPadOS 13.4.5第二个Beta版本 修复个人热点断连及不稳定等问题
什么是人工智能专业?为何如此热门
微软新专利曝光：使用宽带芯片与Apple MacBook竞争
别用“工匠精神”的浪漫，掩盖“工匠制度”的缺失
家用电器如何选择电线大小？了解线缆的几个参数
基于ISL8088的高效2.25MHz降压电源设计方案
iphone8什么时候上市？iphone8未发布就先涨价？64GB起步,有钱才是硬道理
朗科绝影固态硬盘：独立缓存搭配个性散热马甲，确保性能高速稳定
机器人泰迪熊的制作教程
微软披露全新Windows系统高危漏洞 被微软评为最高漏洞级别
三星在日本设先进芯片封装研究中心，瞄准先进封装市场
简单为大家讲解一下不出油低温热固胶技术
Mozilla宣布将停用Voice Fill和Firefox Voice Beta扩展
PCB布局：如何最好地布置PWM微控制器的电路
Somnium Space推出一款专为VR设计的全新3D角色扫描技术
手机到底需不需要安装杀毒软件
国产雄起！华为P9一年销量1200万部，华为Mate9四个月500万部
关于深度学习图像分类不得不说的技巧详解
三星Note 10边框掉漆事件，三星官方还没有任何回应
优派推出全新的VP系列高端摄影显示器VP2785-2K