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
相關推薦
-
XT9701
XT9701 是一款只有 150mΩ 導通電阻，應用于 USB 供 電的電源開關電路。內(nèi)置電荷泵升壓來驅(qū)動 NMOS 功率管， 當處于關斷狀態(tài)時通過寄生的反向體二極管來消除開關的反 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)置熱關斷保 護電路以及短路保護電路。 -
LN9701
LN9701 是一款只有 100mΩ 導通內(nèi)阻，應用于 USB 供 電的電源開關電路。內(nèi)置電荷泵升壓來驅(qū)動 NMOS 功率管， 當處于關斷狀態(tài)時通過寄生的反向體二極管來消除開關的反 向?qū)娏鳌５偷撵o態(tài)功耗（23μA）和小封裝（SOT23-5L） 特別適合電池供電的便攜式設備使用。 保護電路包括防止上電過程中的涌入電流的軟啟電路， 1.1A/1.3A 過流保護電路是 USB 電源必須的，內(nèi)置熱關斷保 護電路以及短路保護電路。 -
LN3005
LN3005 是一個雙通道單刀雙擲模擬開關(SPDT)，適用 于通信系統(tǒng)，醫(yī)療設備和其它便攜式電池供電設備。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。 其極低的開關阻抗——0.5Ω(TYP)和快速開關時間—— 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，由兩個常開 NO 和 兩個常關 NC 開關組成，可以用來作為 2 選 1 的多路選擇開 關。