目录
一,产品概述(General Description) ![]() The JTM2157 is a monolithic step-down switch mode converter with a built-in power MOSFET. It achieves 2A output current over a wide input supply range with excellent load and line regulation.Current mode operation provides fast transient response and eases loop stabilization. Fault condition protection includes cycle-by-cycle current limit and over temperature protection. The JTM2157 requires a minimum number of available standard external components. The JTM2157 is available in TSOT-23-6 and SOT-23-6 packages 二.产品特点(Features) ![]() ● 2A Output Current ● 180mÙ Internal Power MOSFET Switch ● Stable with Low ESR Output Ceramic Capacitors ● Up to 92% Efficiency ● Fixed 600KHz Frequency ● Current Mode Operation ● Over-Temperature Protection with Hiccup-Mode ● Cycle-by-Cycle Over Current Protection ● Wide 4.5V to 23V Operating Input Range ● Output Adjustable from 0.805V to 15V ● 10ìA Shutdown Current ● Available in TSOT-23-6 and SOT-23-6 Packages 三,应用范围 (Applications) ![]() ● Battery Charger ● Pre-Regulator for Linear Regulator ● OLPC, Netbook ● Distributed Power System ● WLED Driver 四.技术规格书下载(产品PDF) ![]()
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![]() ![]() 七,功能概述 ![]() Absolute Maximum Ratings ● Input Supply Voltage (VIN) --------------------------------------------------------------------------------- +25V ● VSW -------------------------------------------------------------------------------------------------------------- -0.3V to VIN +0.3V ● VBS --------------------------------------------------------------------------------------------------------------- Vsw +6V ● All Other Pins Voltage -------------------------------------------------------------------------------------- -0.3V to +6V ● Maximum Junction Temperature (TJ) ------------------------------------------------------------------- +150°C ● Storage Temperature (TS) --------------------------------------------------------------------------------- -65°C to +150°C ● Lead Temperature (Soldering, 10sec.) ----------------------------------------------------------------- +260°C ● Power Dissipation @ TA=25°C, (PD) SOT-23-6 ------------------------------------------------------------------------------------------- +0.4W TSOT-23-6 ----------------------------------------------------------------------------------------- +0.4W ● Package Thermal Resistance, (èJA) SOT-23-6 ------------------------------------------------------------------------------------------- +250°C/W TSOT-23-6 ----------------------------------------------------------------------------------------- +250°C/W ● ESD Susceptibility HBM (Human Body Mode) -------------------------------------------------------------------------------- 2KV 八,相关芯片选择指南
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