LM2574HVN15

Manufacturer Part NumberLM2574HVN15
DescriptionDIP8
ManufacturerNational Semiconductor
LM2574HVN15 datasheet
 


Specifications of LM2574HVN15

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Test Circuit and Layout Guidelines
C
— 22 µF, 75V
IN
Aluminum Electrolytic
C
— 220 µF, 25V
OUT
Aluminum Electrolytic
D1 — Schottky, 11DQ06
L1 — 330 µH, 52627
(for 5V in, 3.3V out, use
100 µH, RL-1284-100)
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.
www.national.com
Fixed Output Voltage Versions
Adjustable Output Voltage Version
FIGURE 2.
10
DS011394-11
DS011394-12