Datasheet

LM2673
SNVS030N –APRIL 2000–REVISED APRIL 2013 www.ti.com
Typical Performance Characteristics (continued)
Switching Frequency Feedback Pin Bias Current
Figure 10. Figure 11.
Load Transient Response for Continuous Mode Load Transient Response for Discontinuous Mode
V
IN
= 20V, V
OUT
= 5V V
IN
= 20V, V
OUT
= 5V,
L = 33 μH, C
OUT
= 200 μF, C
OUT
ESR = 26 mΩ L = 10 μH, C
OUT
= 400 μF, C
OUT
ESR = 13 mΩ
A: Output Voltage, 100 mV//div, AC-Coupled.
A: Output Voltage, 100 mV/div, AC-Coupled.
B: Load Current: 500 mA to 3A Load Pulse
B: Load Current: 200 mA to 3A Load Pulse
Figure 12. Horizontal Time Base: 100 μs/div Figure 13. Horizontal Time Base: 200 μs/div
Continuous Mode Switching Waveforms Discontinuous Mode Switching Waveforms
V
IN
= 20V, V
OUT
= 5V, I
LOAD
= 3A V
IN
= 20V, V
OUT
= 5V, I
LOAD
= 500 mA
L = 33 μH, C
OUT
= 200 μF, C
OUT
ESR = 26 mΩ L = 10 μH, C
OUT
= 400 μF, C
OUT
ESR = 13 mΩ
A: V
SW
Pin Voltage, 10 V/div.
A: V
SW
Pin Voltage, 10 V/div.
B: Inductor Current, 1 A/div
B: Inductor Current, 1 A/div
C: Output Ripple Voltage, 20 mV/div AC-Coupled
C: Output Ripple Voltage, 20 mV/div AC-Coupled
Figure 14. Horizontal Time Base: 1 μs/div Figure 15. Horizontal Time Base: 1 μs//iv
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