JTMB628 3.7V升5V固定频率高达1.2MHz电流模式升压变换器

　　一,产品概述(General Description)
The JTMB628 is a constant frequency, 6-pin SOT23 current mode step-up converter intended for small,low power applications. The JTMB628 switches at 1.2MHz and allows the use of tiny, low cost
capacitors and inductors 2mm or less in height.Internal soft-start results
in small inrush current and extends battery life.
The JTMB628 features automatic shifting to pulse frequency modulation mode at light loads. The JTMB628 includes under-voltage lockout, current limiting, and thermal overload protection to prevent
damage in the event of an output overload.
TheJTMB628 is available in a small 6-pin SOT-23 package.
JTMB628是一款固定频率，SOT23-6封装的电流模式升压变换器，高达1.2MHz的工作频率使得外围电感电容可以选择更小的规格。内置软
启动功能减小了启动冲击电流。JTMB628轻载时自动切换至PFM模式。JTMB628包含了输入欠压锁定，电流限制以及过热保护功能。小尺寸的
封装给PCB省下更多的空间。
二.产品特点(Features)
· Integrated 80mΩ Power MOSFET
· 2V to 24V Input Voltage
· 1.2MHz Fixed Switching Frequency
· Internal 4A Switch Current Limit
· Adjustable Output Voltage
· Internal Compensation
· Up to 28V Output Voltage
· Automatic Pulse Frequency Modulation
Mode at Light Loads
· up to 97% Efficiency
· Available in a 6-Pin SOT23-6 Package

三,应用范围 (Applications)
· Battery-Powered Equipment
· Set-Top Boxed
· LCD Bais Supply
· DSL and Cable Modems and Routers
· Networking cards powered from PCI
or PCI express slots
四,产品封装图 (Package)

五,电路原理图

六, 产品PCB
(略)
七.产品BOM
(略)
八.产品PDF文档

JTMB628

九,功能概述
JTMB628是一款固定频率，SOT23-6封装的电流模式升压变换器，高达1.2MHz的工作频率使得外围电感电容可以选择更小的规格。内置软启动功能减小了启动冲击电流。JTMB628轻载时自动切换至PFM模式。JTMB628包含了输入欠压锁定，电流限制以及过热保护功能。小尺寸的封装给PCB省下更多的空间

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