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目录
一,产品概述(General Description)  The JTMH7401A is a complete, cost effective,highly-efficient power management solution that is ideal for a wide range of portable handheld equipment. This device integrates a compact, high efficiency, and low voltage step-up DC/DC converter and one power switch. VOUT1 is a compact, high efficiency, and low voltage step-up DC/DC converter including an error amplifier, ramp generator, comparator,switch pass element and driver in which providing a stable and high efficient operation over a wide range of load currents. It operates in stable waveforms without external compensation. VOUT2 is an integrated 200mΩ power switch for self-powered and bus-powered Universal Series Bus (USB) applications. The protection functions include current limiting at 1.4A (VIN=3.6V) to meet USB power requirement, and thermal shutdown to protect damage under over current condition. 二.产品特点(Features) Low Quiescent Current: 230μA Wide Input Voltage Range: 2V to 5V VOUT1 Range: 3V to 5.5V VOUT2: 1.4A Current Limit (VIN=3.6V) Efficiency up to 87% MSOP-10L Package 三,应用范围 (Applications) Ø Battery-Powered Equipment Ø Motherboard USB Power Switch Ø Hot-Plug Power Supplies Ø Battery-Charger Circuits Ø USB Device Power Switch Ø Portable Instrument Ø PDA Ø DSC Ø LCD Panel Ø Wireless Equipment 四.技术规格书下载（产品PDF）
 六.电路原理图  七,功能概述 Supply Voltage……… …………… …………… …………… …………… ……….…− 0.3V ～ 6V SW Pin Switch Voltage……………………………………………………………………−0.3V ～ 28V Other I/O Pin Voltages … … … … … … … … … … … … … … … … … … … … … … … − 0.3V ～ 6V SW Pin Switch Current ……………………………………………………………...………………..3A Operating Conditions………………………………………………………………………-40℃ ～ +85℃ Operating Junction Temperature…………………………………..……………………-40℃ ～ +125℃ Storage Temperature Range ………………………………………………………….−65℃ ～ +150℃ Lead Temperature……………………………………………………………………………………+265℃ 八,相关芯片选择指南
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