LM2575HVT-12 National Semiconductor, LM2575HVT-12 Datasheet - Page 11

• Manufacturer Part Number: LM2575HVT-12
• Description: IC, SWITCHING REG 1A 12V, SMD, 2575
• Manufacturer: National Semiconductor

Specifications of LM2575HVT-12

• Primary Input Voltage: 25V
• No. Of Outputs: 1
• Output Voltage: 12V
• Output Current: 1A
• Voltage Regulator Case Style: TO-220
• No. Of Pins: 5
• Operating Temperature Range: -40°C To +125°C
• Svhc: No SVHC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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
01147505
01147506
(Circuit of Figure 2) (Continued)
11
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 12))
01147528
www.national.com
01147507