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LM2575EP Datasheet(PDF) 10 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # LM2575EP
Description  SIMPLE SWITCHER 1A Step-Down Voltage Regulator
PDF  26 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM2575EP Datasheet(HTML) 10 Page - National Semiconductor (TI)

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Typical Performance Characteristics (Circuit of Figure 2) (Continued)
Feedback Pin Current
Maximum Power Dissipation
(TO-263) (See (Note 14))
20113205
20113228
Switching Waveforms
Load Transient Response
20113206
VOUT =5V
A: Output Pin Voltage, 10V/div
B: Output Pin Current, 1A/div
C: Inductor Current, 0.5A/div
D: Output Ripple Voltage, 20 mV/div,
AC-Coupled
Horizontal Time Base: 5 µs/div
20113207
Test Circuit and Layout Guidelines
As in any switching regulator, layout is very important. Rap-
idly switching currents associated with wiring inductance
generate voltage transients which can cause problems. For
minimal inductance and ground loops, the length of the leads
indicated by heavy lines should be kept as short as possible.
Single-point grounding (as indicated) or ground plane con-
struction should be used for best results. When using the
Adjustable version, physically locate the programming resis-
tors near the regulator, to keep the sensitive feedback wiring
short.
www.national.com
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