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LM2574 Datasheet(PDF) 12 Page - Texas Instruments

Part No. LM2574
Description  LM2574/LM2574HV SIMPLE SWITCHER™ 0.5A Step-Down Voltage Regulator
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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LM2574 Datasheet(HTML) 12 Page - Texas Instruments

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LM2574, LM2574HV
SNVS104C – JUNE 1999 – REVISED APRIL 2013
www.ti.com
Figure 24. Adjustable Output Voltage Version
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.
Table 1. Inductor Selection by Manufacturer's Part Number
Inductor Value
Pulse Eng.
Renco
NPI
68
μH
*
RL-1284-68-43
NP5915
100
μH
*
RL-1284-100-43
NP5916
150
μH
52625
RL-1284-150-43
NP5917
220
μH
52626
RL-1284-220-43
NP5918/5919
330
μH
52627
RL-1284-330-43
NP5920/5921
470
μH
52628
RL-1284-470-43
NP5922
680
μH
52629
RL-1283-680-43
NP5923
1000
μH
52631
RL-1283-1000-43
*
1500
μH
*
RL-1283-1500-43
*
2200
μH
*
RL-1283-2200-43
*
12
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Copyright © 1999–2013, Texas Instruments Incorporated
Product Folder Links: LM2574 LM2574HV


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