lm2575hvs-adjep National Semiconductor Corporation, lm2575hvs-adjep Datasheet - Page 10

• Manufacturer Part Number: lm2575hvs-adjep
• Description: Simple Switcher 1a Step-down Voltage Regulator
• Manufacturer: National Semiconductor Corporation

www.national.com
Typical Performance Characteristics
V
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
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.
OUT
= 5V
Feedback Pin Current
Switching Waveforms
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(Circuit of Figure 2) (Continued)
10
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.
Maximum Power Dissipation
Load Transient Response
(TO-263) (See (Note 14))
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