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LM2674N-12 データシート(PDF) 9 Page - Texas Instruments

部品番号 LM2674N-12
部品情報  LM2674 SIMPLE SWITCHER짰 Power Converter High Efficiency 500 mA Step-Down Voltage Regulator
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ホームページ  http://www.ti.com
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LM2674N-12 データシート(HTML) 9 Page - Texas Instruments

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LM2674
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SNVS007F – SEPTEMBER 1998 – REVISED APRIL 2013
Typical Performance Characteristics
(Circuit of Figure 22)
Continuous Mode Switching Waveforms
Discontinuous Mode Switching Waveforms
VIN = 20V, VOUT = 5V, ILOAD = 500 mA
VIN = 20V, VOUT = 5V, ILOAD = 300 mA
L = 100
μH, COUT = 100 μF, COUTESR = 0.1Ω
L = 15
μH, COUT = 68 μF (2×), COUTESR = 25 mΩ
A: VSW Pin Voltage, 10 V/div.
A: VSW Pin Voltage, 10 V/div.
B: Inductor Current, 0.2 A/div
B: Inductor Current, 0.5 A/div
C: Output Ripple Voltage, 50 mV/div AC-Coupled
C: Output Ripple Voltage, 20 mV/div AC-Coupled
Figure 17. Horizontal Time Base: 1
μs/div
Figure 18. Horizontal Time Base: 1
μs/div
Load Transient Response for Continuous Mode
Load Transient Response for Discontinuous Mode
VIN = 20V, VOUT = 5V,
VIN = 20V, VOUT = 5V,
L = 100
μH, COUT = 100 μF, COUTESR = 0.1Ω
L = 47
μH, COUT = 68 μF, COUTESR = 50 mΩ
A: Output Voltage, 100 mV/div, AC-Coupled.
A: Output Voltage, 100 mV/div, AC-Coupled.
B: Load Current: 100 mA to 500 mA Load Pulse
B: Load Current: 100 mA to 400 mA Load Pulse
Figure 19. Horizontal Time Base: 50
μs/div
Figure 20. Horizontal Time Base: 200
μs/div
Copyright © 1998–2013, Texas Instruments Incorporated
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