参数资料
型号: LM2576-3.3MDC
厂商: NATIONAL SEMICONDUCTOR CORP
元件分类: 稳压器
英文描述: 7.5 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, UUC
封装: DIE
文件页数: 27/27页
文件大小: 741K
代理商: LM2576-3.3MDC
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.
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.
Fixed Output Voltage Versions
DS011476-7
CIN — 100 F, 75V, Aluminum Electrolytic
COUT — 1000 F, 25V, Aluminum Electrolytic
D1 — Schottky, MBR360
L1 — 100 H, Pulse Eng. PE-92108
R1 — 2k, 0.1%
R2 — 6.12k, 0.1%
Adjustable Output Voltage Version
DS011476-8
where VREF = 1.23V, R1 between 1k and 5k.
FIGURE 2.
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