Current 2614 Dokumentacja Strona 1

LM2614400mA Sub-Miniature Adjustable DC-DC ConverterOptimized for RF Power AmplifiersGeneral DescriptionThe LM2614 DC-DC converter is optimized for po

Device Information (Continued)PWM OPERATIONWhile in PWM (Pulse Width Modulation) mode, the outputvoltage is regulated by switching at a constant frequ

Device Information (Continued)extending battery life when the load is in a low-powerstandby mode. In PFM mode, quiescent current into the VDDpin is 16

Device Information (Continued)SOFT-STARTThe LM2614 has soft start to reduce current inrush duringpower-up and startup. This reduces stress on the LM26

Application InformationSETTING THE OUTPUT VOLTAGEThe LM2614 can be used with external feedback resistorsand an analog signal to vary the output voltag

Application Information (Continued)CAPACITOR SELECTIONUse a 4.7µF or 10µF ceramic input capacitor. A 10µF ce-ramic input capacitor is recommended if t

Application Information (Continued)3. Arrange the components so that the switching currentloops curl in the same direction. During the first half ofea

Physical Dimensions inches (millimeters) unless otherwise notedNOTES: UNLESS OTHERWISE SPECIFIED1. EPOXY COATING2. 63Sn/37Pb EUTECTIC BUMP3. RECOMMEND

Typical Application Circuits20036701FIGURE 1. Typical Circuit for Powering RF Power Amplifiers20036702FIGURE 2. Typical Circuit for 2.5V Output Voltag

Connection Diagrams10-Bump micro SMD Package20036704Top View20036705Bottom ViewOrdering InformationOrder Number Package TypeNSC PackageMarking (*)Supp

Absolute Maximum Ratings (Note 1)If Military/Aerospace specified devices are required,please contact the National Semiconductor Sales Office/Distribut

Typical Performance CharacteristicsLM2614ATL, Circuit of Figure 4,VIN= 3.6V, TA= 25˚C, unless otherwise noted.Quiescent Supply Current vs Supply Volta

Typical Performance CharacteristicsLM2614ATL, Circuit of Figure 4,VIN= 3.6V, TA= 25˚C, unless otherwise noted. (Continued)Output Voltage vs Output Cur

Typical Performance CharacteristicsLM2614ATL, Circuit of Figure 4,VIN= 3.6V, TA= 25˚C, unless otherwise noted. (Continued)Efficiency vs Output Current

Typical Performance CharacteristicsLM2614ATL, Circuit of Figure 4,VIN= 3.6V, TA= 25˚C, unless otherwise noted. (Continued)Efficiency vs Output Voltage

Device Information (Continued)CIRCUIT OPERATIONReferring to Figure 4, Figure 5, Figure 6 and Figure 7,the LM2614 operates as follows. During the first