LM2576HVDP-ADJ 데이터 시트보기 (PDF) - HTC Korea
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LM2576HVDP-ADJ Datasheet PDF : 7 Pages
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3A, 52kHz, Step-down Switching Regulator
LM2576HV
APPLICATION INFORMATION
As in any switching regulator, layout is very important. Rapidly 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. Single-point grounding
(as indicated) or ground plane construction should be used for best results. When using the Adjustable
version, physically locate the programming resistors near the regulator, to keep the sensitive feedback wiring
short.
- Fixed Output Voltage Version
Input Voltage
CIN +
100uF
LM2576HV
VIN
OUTPUT
ON/OFF
GND
Feed
back
L1
100uH
D1
MBR360
Regulated Output
5V
+ COUT
1000uF
- Adjustable Output Voltage Version
Input Voltage
LM2576HV
VIN
OUTPUT
CIN +
100uF
ON/OFF
GND
Feed
back
L1
100uH
Regulated Output
5V
R2
+ COUT
D1
1000uF R1
MBR360
*
VOUT
=
VREF
(1+
R2
R1
)
*
R2
=
R1(
VOUT
VREF
- 1)
where VREF = 1.23V, R1 between 1KΩ and 5KΩ.
- CIN : 100uF, 75V, Aluminum Electrolytic
- COUT : 1000uF, 25V, Aluminum Electrolytic
- D1 - Schottky, MBR360
- L1 : 100uH, Pulse Eng. PE-92108
- R1 : 2K, 0.1%
- R2 : 6.12K, 0.1%
Feb. 2014 – R1.0
-7-
HTC
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