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LM2672 Arkusz danych(PDF) 9 Page - Texas Instruments

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Numer części LM2672
Szczegółowy opis  LM2672 SIMPLE SWITCHER짰 Power Converter High Efficiency 1-A Step-Down Voltage Regulator with Features
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LM2672
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SNVS136L – SEPTEMBER 1998 – REVISED JUNE 2016
Product Folder Links: LM2672
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Copyright © 1998–2016, Texas Instruments Incorporated
Typical Characteristics (continued)
Figure 13. Dropout Voltage, 3.3-V Option
Figure 14. Dropout Voltage, 5-V Option
7.11 Typical Characteristics – Fixed Output Voltage Versions
see Figure 19
VSW pin voltage, 10 V/div
VIN = 20 V, VOUT = 5 V,
Inductor current, 0.5 A/div
ILOAD = 1 A, L = 47 μH,
Output ripple voltage,
20 mV/div AC-coupled
COUT = 68 μF,
COUTESR = 50 mΩ
Figure 15. Continuous Mode Switching Waveforms,
Horizontal Time Base: 1 μs/div
VSW pin voltage, 10 V/div
VIN = 20 V, VOUT = 5 V,
Inductor current, 0.5 A/div
ILOAD = 300 mA, L = 15 μH,
Output ripple voltage,
20 mV/div AC-coupled
COUT = 68 μF (2×),
COUTESR = 25 mΩ
Figure 16. Discontinuous Mode Switching Waveforms,
Horizontal Time Base: 1 μs/div
Output voltage,
VIN = 20 V, VOUT = 5 V,
100 mV/div, AC-coupled
ILOAD = 1 A, L = 47 μH,
Load current: 200 mA to
1 A load pulse
COUT = 68 μF,
COUTESR = 50 mΩ
Figure 17. Load Transient Response for Continuous Mode,
Horizontal Time Base: 50 μs/div
Output voltage,
VIN = 20 V, VOUT = 5 V,
100 mV/div, AC-coupled
L = 47 μH,
Load current: 100 mA to
300 mA load pulse
COUT = 68 μF,
COUTESR = 50 mΩ
Figure 18. Load Transient Response for Discontinuous
Mode, Horizontal Time Base: 200 μs/div


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