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LM2653 Folha de dados(PDF) 4 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Nome de Peças LM2653
Descrição Electrónicos  1.5A High Efficiency Synchronous Switching Regulator
Download  12 Pages
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Fabricante Electrônico  NSC [National Semiconductor (TI)]
Página de início  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM2653 Folha de dados(HTML) 4 Page - National Semiconductor (TI)

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Electrical Characteristics (Continued)
Note 2: The maximum allowable power dissipation is calculated by using PDMAX =(TJMAX −TA)/θJA, where TJMAX is the maximum junction temperature, TA is the
ambient temperature, and
θJA is the junction-to-ambient thermal resistance of the specified package. The 893 mW rating results from using 150˚C, 25˚C, and
140˚C/W for TJMAX,TA, and θJA respectively. A θJA of 140˚C/W represents the worst-case condition of no heat sinking of the 16-pin TSSOP package. Heat sinking
allows the safe dissipation of more power. The Absolute Maximum power dissipation must be derated by 7.14 mW per ˚C above 25˚C ambient. The LM2653 actively
limits its junction temperatures to about 165˚C.
Note 3: The human body model is a 100 pF capacitor discharged through a 1.5 k
Ω resistor into each pin.
Note 4: Typical numbers are at 25˚C and represent the most likely norm.
Note 5: All limits guaranteed at room temperature (standard typeface) and at temperature extremes (bold typeface). All room temperature limits are 100%
production tested. All limits at temperature extremes are guaranteed via correlation using standard Statistical Quality Control (SQC) methods. All limits are used
to calculate Average Outgoing Quality Level (AOQL).
Typical Performance Characteristics
Efficiency vs Load Current
(V
IN = 5V, VOUT = 2.5V)
l
Q vs VIN
10104922
10104904
I
QSD vs Input Voltage
I
QSD vs Junction Temperature
10104925
10104926
Frequency vs Junction Temperature
R
SW(ON) vs Input Voltage
10104907
10104923
www.national.com
4


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