LM2574HVN-ADJ National Semiconductor, LM2574HVN-ADJ Datasheet - Page 10
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LM2574HVN-ADJ
Manufacturer Part Number
LM2574HVN-ADJ
Description
IC, STEP-DOWN REGULATOR, 8-DIP
Manufacturer
National Semiconductor
Datasheet
1.LM2574HVN-ADJ.pdf
(24 pages)
Specifications of LM2574HVN-ADJ
Primary Input Voltage
60V
No. Of Outputs
1
Output Voltage
57V
Output Current
500mA
No. Of Pins
8
Operating Temperature Range
-40°C To +125°C
Supply Voltage Range
4V To 60V
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LM2574HVN-ADJ
Manufacturer:
NS
Quantity:
5 510
Company:
Part Number:
LM2574HVN-ADJ
Manufacturer:
DIP8
Quantity:
5 510
www.national.com
Test Circuit and Layout Guidelines
C
C
D1 — Schottky, 11DQ06
L1 — 330 µH, 52627
R1 — 2k, 0.1%
R2 — 6.12k, 0.1%
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 pos-
sible. Single-point grounding (as indicated) or ground plane
construction 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.
IN
OUT
— 22 µF, 75V
— 220 µF, 25V
Aluminum Electrolytic
Aluminum Electrolytic
(for 5V in, 3.3V out, use
100 µH, RL-1284-100)
Adjustable Output Voltage Version
Fixed Output Voltage Versions
FIGURE 2.
10
DS011394-11
DS011394-12