XT9701 是一款只有 150mΩ 導(dǎo)通電阻，應(yīng)用于 USB 供 電的電源開關(guān)電路。內(nèi)置電荷泵升壓來驅(qū)動 NMOS 功率管， 當(dāng)處于關(guān)斷狀態(tài)時通過寄生的反向體二極管來消除開關(guān)的反 向?qū)娏鳌５偷撵o態(tài)功耗（23μA）和小封裝（SOT-23-5） 特別適合電池供電的便攜式設(shè)備使用。 保護電路包括防止上電過程中的涌入電流的軟啟電路， 過流保護的電流分為 900mA 和 600mA 兩種，內(nèi)置熱關(guān)斷保 護電路以及短路保護電路。

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.

LN3005 是一個雙通道單刀雙擲模擬開關(guān)(SPDT)，適用 于通信系統(tǒng)，醫(yī)療設(shè)備和其它便攜式電池供電設(shè)備。它采用 CMOS 工藝，具有雙向，超低阻值，低功耗，低漏電流，高 速，高帶寬的特點，非常適合電池供電的便攜式產(chǎn)品采用。 其極低的開關(guān)阻抗——0.5Ω(TYP)和快速開關(guān)時間—— tON=16ns, tOFF=15ns，可以大大減少電池供電便攜式產(chǎn)品的 信號損失，改善音頻及視頻輸出級。LN3005 在封裝上采用 了 DFN-10 和 MSOP-10 的封裝，體積小巧，節(jié)省了很多空 間。LN3005 集成了兩個單刀雙擲開關(guān)，由兩個常開 NO 和 兩個常關(guān) NC 開關(guān)組成，可以用來作為 2 選 1 的多路選擇開 關(guān)。