LM2575T-12 National Semiconductor, LM2575T-12 Datasheet - Page 9
LM2575T-12
Manufacturer Part Number
LM2575T-12
Description
Voltage Regulator IC
Manufacturer
National Semiconductor
Specifications of LM2575T-12
No. Of Pins
5
Output Current
1A
Peak Reflow Compatible (260 C)
No
Output Voltage
12V
Termination Type
Through Hole
Supply Voltage Max
40V
Leaded Process Compatible
No
Mounting Type
Through Hole
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LM2575T-12
Manufacturer:
NS/国半
Quantity:
20 000
Company:
Part Number:
LM2575T-12G
Manufacturer:
ON Semiconductor
Quantity:
378
Typical Performance Characteristics
Feedback Pin Current
Switching Waveforms
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
DS011475-5
DS011475-6
(Circuit of Figure 2 ) (Continued)
Maximum Power Dissipation
(TO-263) (See (Note 12))
Load Transient Response
9
Single-point grounding (as indicated) or ground plane con-
struction should be used for best results. When using the Ad-
justable version, physically locate the programming resistors
near the regulator, to keep the sensitive feedback wiring
short.
DS011475-28
DS011475-7
www.national.com