LM2576HVT-5.0 View Datasheet(PDF) - Unspecified

Part Name

Description

Manufacturer

LM2576HVT-5.0

SIMPLE SWITCHER® 3A Step-Down Voltage Regulator

Unspecified 

LM2576/LM2576HV

Test Circuit and Layout Guidelines

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.

CIN -----100μF, 75V, Aluminum Electrolytic

COUT -----1000μF, 25V, Aluminum Electrolytic

D1 ----- Schottky, MBR360

L1 ----- 100μH, Pulse Eng. PE-92108

R1 ----- 2K, 0.1%

R2 ----- 6.12K, 0.1%

where VREF = 1.23V, R1 between 1K and 5K.

FIGURE2

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