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LM2574 Datasheet(PDF) 10 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
Logo TI - Texas Instruments

LM2574 Datasheet(HTML) 10 Page - Texas Instruments

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LM2574, LM2574HV
SNVS104C ? JUNE 1999 ? REVISED APRIL 2013
www.ti.com
Typical Performance Characteristics
(Circuit of Figure 24)
Continuous Mode Switching Waveforms
Discontinuous Mode Switching Waveforms
VOUT = 5V, 500 mA Load Current, L = 330 ?H
VOUT = 5V, 100 mA Load Current, L = 100 ?H
Notes:
Notes:
A: Output Pin Voltage, 10V/div
A: Output Pin Voltage, 10V/div
B: Inductor Current, 0.2 A/div
B: Inductor Current, 0.2 A/div
C: Output Ripple Voltage, 20 mV/div,
C: Output Ripple Voltage, 20 mV/div,
AC-Coupled
AC-Coupled
Horizontal Time Base: 5
?s/div
Horizontal Time Base: 5
?s/div
Figure 18.
Figure 19.
500 mA Load Transient Response for Continuous
250 mA Load Transient Response for Discontinuous
Mode Operation. L = 330
?H, COUT = 300 ?F
Mode Operation. L = 68
?H, COUT = 470 ?F
Notes:
Notes:
A: Output Voltage, 50 mV/div.
A: Output Voltage, 50 mV/div.
AC Coupled
AC Coupled
B: 100 mA to 500 mA Load Pulse
B: 50 mA to 250 mA Load Pulse
Horizontal Time Base: 200
?s/div
Horizontal Time Base: 200
?s/div
Figure 20.
Figure 21.
10
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Copyright 1999?2013, Texas Instruments Incorporated
Product Folder Links: LM2574 LM2574HV


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