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LM2575T-5.0 Datasheet(PDF) 25 Page - Texas Instruments

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Part No. LM2575T-5.0
Description  LM1575/LM2575/LM2575HV SIMPLE SWITCHER 1A Step-Down Voltage Regulator
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Maker  TI1 [Texas Instruments]
Homepage  http://www.ti.com

LM2575T-5.0 Datasheet(HTML) 25 Page - Texas Instruments

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LM1575, LM2575-N, LM2575HV
SNVS106E – MAY 1999 – REVISED APRIL 2013
CAPACITOR RIPPLE CURRENT RMS value of the maximum allowable alternating current at which a capacitor
can be operated continuously at a specified temperature.
STANDBY QUIESCENT CURRENT (ISTBY) Supply current required by the LM2575 when in the standby mode
(ON /OFF pin is driven to TTL-high voltage, thus turning the output switch OFF).
ΔIIND) The peak-to-peak value of the inductor current waveform, typically a
sawtooth waveform when the regulator is operating in the continuous mode (vs. discontinuous mode).
CONTINUOUS/DISCONTINUOUS MODE OPERATION Relates to the inductor current. In the continuous mode,
the inductor current is always flowing and never drops to zero, vs. the discontinuous mode, where the
inductor current drops to zero for a period of time in the normal switching cycle.
INDUCTOR SATURATION The condition which exists when an inductor cannot hold any more magnetic flux.
When an inductor saturates, the inductor appears less inductive and the resistive component dominates.
Inductor current is then limited only by the DC resistance of the wire and the available source current.
OPERATING VOLT MICROSECOND CONSTANT (E•Top) The product (in VoIt•μs) of the voltage applied to the
inductor and the time the voltage is applied. This E•Top constant is a measure of the energy handling
capability of an inductor and is dependent upon the type of core, the core area, the number of turns, and
the duty cycle.
Copyright © 1999–2013, Texas Instruments Incorporated
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Product Folder Links: LM1575 LM2575-N LM2575HV

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