Product Center
LN9703
■ General Description The LN9703 is a low voltage, high performance single N-MOSFET power switch, designed for power rail on/off control with low RDS(ON)≈70mΩ and full protection functions. The LN9703 equipped with a charge pump circuitry to drive the internal MOSFET switch and a flag output is available to indicate fault conditions against large di/dt which may cause the supply to fall out of regulation. In order to fit different application, an ISET pin is offered for current limit point setting, a resistor from ISET to ground sets the current limit for the switch. Additional features include soft-start to limit inrush current during plug-in, thermal shutdown to prevent catastrophic switch failure from high-current loads, Output anti back irrigation Protection whether EN pin is connected GND or VIN, under-voltage lockout (UVLO) to ensure that the device remains off unless there is a valid input voltage present, a precision resistor-programmable output current limit up to 3.5A. Besides, the lower quiescent current as 40μA making this device ideal for portable battery-operated equipment. The LN9703 is available in SOT23-5 or SOP-8 package requiring minimum board space and smallest components.
■ Applications ? USB 3G Datacard ? USB Dongle ? MiniPCI Accessories ? LCD Monitor, LCD-TV ? USB Power Module for ADSL ? Information Appliance and Set-Top Box ? Battery-Powered Equipment ? Hot-Plug Power Supplies ? ACPI Power Distribution ? PCI Bus Power Switching ? Motherboard & Notebook PCs ? PC Card Hot Swap Application
■ Features ? Adjustable Current Limiting up to 3.5A ? Built-In (Typically 70mΩ) N-MOSFET ? Reverse Current Flow Blocking (no body diode) ? Output Can Be Forced Higher than Input (Off or On State) ? Low Supply Current : --------40μA Typical at Switch on State --------Less than 1μA Typical at Switch Off State ? Guaranteed Continuous Load Current --------LN9703MR（SOT23-5）：2.1A --------LN9703SR（SOP-8） ：3A ? Wide Input Voltage Ranges : 2V to 5.5V ? Open-Drain Fault Flag Output ? Hot Plug-In Application (Soft-Start) ? 1.7V Typical Under-Voltage Lockout (UVLO) ? Thermal Shutdown Protection ? Smallest SOT23-5 and SOP-8 Package ? RoHS Compliant and 100% Lead (Pb)-Free
相关推荐
-
XT9701
XT9701 是一款只有 150mΩ 导通电阻，应用于 USB 供 电的电源开关电路。内置电荷泵升压来驱动 NMOS 功率管， 当处于关断状态时通过寄生的反向体二极管来消除开关的反 向导通电流。低的静态功耗（23?A）和小封装（SOT-23-5） 特别适合电池供电的便携式设备使用。 保护电路包括防止上电过程中的涌入电流的软启电路， 过流保护的电流分为 900mA 和 600mA 两种，内置热关断保 护电路以及短路保护电路。 -
LN9701
LN9701 是一款只有 100mΩ 导通内阻，应用于 USB 供 电的电源开关电路。内置电荷泵升压来驱动 NMOS 功率管， 当处于关断状态时通过寄生的反向体二极管来消除开关的反 向导通电流。低的静态功耗（23?A）和小封装（SOT23-5L） 特别适合电池供电的便携式设备使用。 保护电路包括防止上电过程中的涌入电流的软启电路， 1.1A/1.3A 过流保护电路是 USB 电源必须的，内置热关断保 护电路以及短路保护电路。 -
LN3005
LN3005 是一个双通道单刀双掷模拟开关(SPDT)，适用 于通信系统，医疗设备和其它便携式电池供电设备。它采用 CMOS 工艺，具有双向，超低阻值，低功耗，低漏电流，高 速，高带宽的特点，非常适合电池供电的便携式产品采用。 其极低的开关阻抗——0.5Ω(TYP)和快速开关时间—— tON=16ns, tOFF=15ns，可以大大减少电池供电便携式产品的 信号损失，改善音频及视频输出级。LN3005 在封装上采用 了 DFN-10 和 MSOP-10 的封装，体积小巧，节省了很多空 间。LN3005 集成了两个单刀双掷开关，由两个常开 NO 和 两个常关 NC 开关组成，可以用来作为 2 选 1 的多路选择开 关。