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LM2574M-5.0 Datasheet(PDF) 8 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Part # LM2574M-5.0
Description  SIMPLE SWITCHER??0.5A Step-Down Voltage Regulator
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM2574M-5.0 Datasheet(HTML) 8 Page - National Semiconductor (TI)

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Typical Performance Characteristics (Circuit of Figure 2) (Continued)
Feedback
Pin Current
DS011394-39
Junction to Ambient
Thermal Resistance
DS011394-40
Continuous Mode Switching Waveforms
V
OUT = 5V, 500 mA Load Current, L = 330 µH
DS011394-6
Notes:
A: Output Pin Voltage, 10V/div
B: Inductor Current, 0.2 A/div
C: Output Ripple Voltage, 20 mV/div,
AC-Coupled
Horizontal Time Base: 5 µs/div
Discontinuous Mode Switching Waveforms
V
OUT = 5V, 100 mA Load Current, L = 100 µH
DS011394-7
Notes:
A: Output Pin Voltage, 10V/div
B: Inductor Current, 0.2 A/div
C: Output Ripple Voltage, 20 mV/div,
AC-Coupled
Horizontal Time Base: 5 µs/div
500 mA Load Transient Response for Continuous
Mode Operation. L = 330 µH, C
OUT = 300 µF
DS011394-8
Notes:
A: Output Voltage, 50 mV/div.
AC Coupled
B: 100 mA to 500 mA Load Pulse
Horizontal Time Base: 200 µs/div
250 mA Load Transient Response for Discontinuous
Mode Operation. L = 68 µH, C
OUT = 470 µF
DS011394-9
Notes:
A: Output Voltage, 50 mV/div.
AC Coupled
B: 50 mA to 250 mA Load Pulse
Horizontal Time Base: 200 µs/div
www.national.com
8


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