VMIVME3230模擬量輸出模塊
高效6A開關(guān)穩(wěn)壓器
LT?1370是一款單片高頻電流模式開關(guān)穩(wěn)壓器。它可以在所有標(biāo)準(zhǔn)開關(guān)配置中運(yùn)行，包括升壓、降壓、反激、正向、反相和“Cuk”。芯片上包括6A高效開關(guān)以及所有振蕩器、控制和保護(hù)電路。LT1370通常只消耗4.5mA的靜態(tài)電流，并且比以前的部件具有更高的效率。高頻開關(guān)允許使用非常小的電感器。新的設(shè)計(jì)技術(shù)增加了靈活性并保持了易用性。切換容易與外部邏輯電平源同步。關(guān)機(jī)引腳上的邏輯低將電源電流降至12μA。獨(dú)特的誤差放大器電路可以調(diào)節(jié)正或負(fù)輸出電壓，同時(shí)保持簡單的頻率補(bǔ)償技術(shù)。非線性誤差放大器跨導(dǎo)減少了啟動(dòng)或過載恢復(fù)時(shí)的輸出過沖。振蕩器頻移在過載條件下保護(hù)外部組件。描述U 更快的切換，提高效率 使用小型電感器：4.7μH 所有表面安裝組件
最低供電電壓低：
2.7V 靜態(tài)電流：
典型4.5mA 限流電源開關(guān)：6A 調(diào)節(jié)正或負(fù)輸出 停機(jī)電源電流：典型12μA 輕松的外部同步 開關(guān)電阻：0.065? Typ TYPICAL APPLICATION U FEATURES、LTC和LT是Linear Technology Corporation的注冊商標(biāo)。 升壓調(diào)節(jié)器 筆記本電腦用品 多輸出反激電源 逆變電源應(yīng)用U 5V至12V升壓轉(zhuǎn)換器 VC=0.8V處測量 1.225 1.245 1.265 V IFB反饋輸入電流VFB=VREF 250 550 nA 900 nA參考電壓線調(diào)節(jié)2.7V≤ 文≤ 25伏，電壓=0.8伏 0.01 0.03%/V VNFR負(fù)反饋參考電壓在負(fù)反饋引腳處測量–2.525–2.48–2.435 V反饋引腳開路，VC=0.8V –2.560–2.48–2.400 V INFB負(fù)反饋輸入電流VNFB=VNFR –45–30–15μA負(fù)反饋參考電壓2.7V≤ 文≤ 25伏，電壓=0.8伏 0.01 0.05%/V線路調(diào)節(jié)gm誤差放大器跨導(dǎo)?IC=±25μA 1100 1500 1900μmho 700 2300μmho誤差放大器源電流VFB=VREF–150mV，VC=1.5V
High efficiency 6A switching regulator
LT ? 1370 is a monolithic high-frequency current mode switching regulator. It can operate in all standard switch configurations, including boost, drop, flyback, forward, reverse and "Cuk". The chip includes 6A high efficiency switch and all oscillator, control and protection circuits. The LT1370 normally consumes only 4.5 mA of quiescent current and is more efficient than previous components. High frequency switches allow the use of very small inductors. New design techniques increase flexibility and maintain ease of use. Switching is easy to synchronize with external logic level source. The low logic on the shutdown pin reduces the power supply current to 12 μ A. The unique error amplifier circuit can adjust the positive or negative output voltage while maintaining a simple frequency compensation technology. The transconductance of nonlinear error amplifier reduces the output overshoot during startup or overload recovery. The oscillator frequency shift protects the external components under overload conditions. Describe faster U switching and efficiency improvement Use of small inductors: 4.7 μ H All surface mounted components
Low minimum supply voltage:
2.7 V quiescent current:
Typical 4.5mA current limiting power switch: 6A to adjust the current of positive or negative output shutdown power supply: typical 12 μ A easy external synchronous switch resistance: 0.065 ? Typ TYPICAL APPLICATION U FEATURES, LTC and LT are registered trademarks of Linear Technology Corporation. Boost regulator Notebook computer supplies Multi output flyback power inverter power supply Use U 5V to 12V boost converter VC=0.8V to measure 1.225 1.245 1.265 V IFB feedback input current VFB=VREF 250 550 nA 900 nA reference voltage line to adjust 2.7 V ≤ Wen ≤ 25 V, voltage=0.8 V 0.01 0.03%/V VNFR negative feedback reference voltage to measure at the negative feedback pin – 2.525 – 2.48 – 2.435 V feedback pin open circuit, VC=0.8V – 2.560 – 2.48 – 2.400 V INFB negative feedback input current VNFB=VNFR – 45 – 30 – 15 μ A negative feedback reference voltage 2.7V ≤ Wen ≤ 25 V, voltage=0.8 V 0.01 0.05%/V Line adjustment gm error amplifier transconductance ? IC=± 25 μ A 1100 1500 1900 μ mho 700 2300 μ mho error amplifier source current VFB=VREF – 150V, VC=1.5V
