參數(shù)資料
    

    


    


    
型號(hào)：
LTC3615IFE#PBF

    

    
廠商：
LINEAR TECHNOLOGY CORP

    

    
元件分類：
穩(wěn)壓器

    

    
英文描述：
SWITCHING REGULATOR, PDSO24

    

    
封裝：
4.40 MM, LEAD FREE, PLASTIC, TSSOP-24

    

    
文件頁(yè)數(shù)：
6/32頁(yè)

    

    
文件大小：
585K

    

    
代理商：
LTC3615IFE#PBF


    

    

    

	
    
    
    

    
    
	
    LTC3615/LTC3615-1
    14
    3615fa
    Low Supply Operation
    The LTC3615 is designed to operate down to an input supply
    voltage of 2.25V. An important consideration at low input
    supply voltages is that the RDS(ON) of the P-channel and
    N-channel power switches increases by 50% compared to
    5V. The user should calculate the power dissipation when
    the LTC3615 is used at 100% duty cycle with low input
    voltages to ensure that thermal limits are not exceeded.
    Slope Compensation and Inductor Peak Current
    Slope compensation provides stability in current mode
    constant-frequency architectures by preventing subhar-
    monic oscillations at duty cycles greater than 50%. The
    LTC3615 implements slope compensation by adding a
    compensation ramp to the inductor current signal.
    Short-Circuit Protection
    The peak inductor current at which the current comparator
    shuts off the top power switch is controlled by the voltage
    on the ITH pin.
    If the output current increases, the error amplier raises
    the ITH pin voltage until the average inductor current
    matches the new load current. In normal operation,
    the LTC3615 clamps the maximum ITH pin voltage at
    approximately 1.05V which corresponds to about 5A peak
    inductor current.
    When the output is shorted to ground, the inductor current
    decays very slowly during a single switching cycle. The
    LTC3615 uses two techniques to prevent current runaway
    from occurring:
    1. If the output voltage drops below 50% of its nominal
    value, the clamp voltage at pin ITH is lowered, causing
    the maximum peak inductor current to lower gradu-
    ally with the output voltage. When the output voltage
    reaches 0V, the clamp voltage at the ITH pin drops to
    40% of the clamp voltage during normal operation. The
    short-circuit peak inductor current is determined by the
    minimum on-time of the LTC3615, the input voltage
    and the inductor value. This foldback behavior helps
    in limiting the peak inductor current when the output
    is shorted to ground. It is disabled during internal or
    external soft-start and tracking up/down operation (see
    the Applications Information section).
    2. If the inductor current of the bottom MOSFET increases
    beyond 6A typical, the top power MOSFET will be held
    off and switching cycles will be skipped until the induc-
    tor current reduces.
    OPERATION
    
    
    
    
    
    


    


    

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    相關(guān)代理商/技術(shù)參數(shù)
    		

    參數(shù)描述
    		

    
    

    
LTC3615IUF#PBF
功能描述:IC REG BUCK SYNC ADJ 3A DL 24QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:250 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:1.2V 輸入電壓:2.05 V ~ 6 V PWM 型:電壓模式 頻率 - 開關(guān):2MHz 電流 - 輸出:500mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:6-UFDFN 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:6-SON（1.45x1） 產(chǎn)品目錄頁(yè)面:1032 (CN2011-ZH PDF) 其它名稱:296-25628-2

    

    
LTC3615IUF#TRPBF
功能描述:IC REG BUCK SYNC ADJ 3A DL 24QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 設(shè)計(jì)資源:Design Support Tool 標(biāo)準(zhǔn)包裝:1 系列:- 類型:升壓（升壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:3V 輸入電壓:0.75 V ~ 2 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:100mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-5 細(xì)型，TSOT-23-5 包裝:剪切帶 (CT) 供應(yīng)商設(shè)備封裝:TSOT-23-5 其它名稱:AS1323-BTTT-30CT

    

    
LTC3615IUF-1#PBF
功能描述:IC REG BUCK SYNC ADJ 3A DL 24QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 設(shè)計(jì)資源:Design Support Tool 標(biāo)準(zhǔn)包裝:1 系列:- 類型:升壓（升壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:3V 輸入電壓:0.75 V ~ 2 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:100mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-5 細(xì)型，TSOT-23-5 包裝:剪切帶 (CT) 供應(yīng)商設(shè)備封裝:TSOT-23-5 其它名稱:AS1323-BTTT-30CT

    

    
LTC3615IUF-1#TRPBF
功能描述:IC REG BUCK SYNC ADJ 3A DL 24QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 設(shè)計(jì)資源:Design Support Tool 標(biāo)準(zhǔn)包裝:1 系列:- 類型:升壓（升壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:3V 輸入電壓:0.75 V ~ 2 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:100mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-5 細(xì)型，TSOT-23-5 包裝:剪切帶 (CT) 供應(yīng)商設(shè)備封裝:TSOT-23-5 其它名稱:AS1323-BTTT-30CT

    

    
LTC3615IUFPBF
 制造商:Linear Technology 功能描述:Dual 4MHz 3A Synch Step-Down DC/DC QFN24

    

    
    
    
    
	
    	
    
    
     
     
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