lm2673sx-adj National Semiconductor Corporation, lm2673sx-adj Datasheet - Page 8

• Manufacturer Part Number: lm2673sx-adj
• Description: Simple Switcher 3a Step-down Voltage Regulator With Adjustable Current Limit
• Manufacturer: National Semiconductor Corporation

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A: V
B: Inductor Current, 1 A/div
C: Output Ripple Voltage, 20 mV/div AC-Coupled
Block Diagram
* Active Inductor Patent Number 5,514,947
† Active Capacitor Patent Number 5,382,918
SW
Pin Voltage, 10 V/div.
L = 33 μH, C
Continuous Mode Switching Waveforms
V
Horizontal Time Base: 1 μs/div
IN
= 20V, V
OUT
= 200 μF, C
OUT
= 5V, I
OUT
LOAD
ESR = 26 mΩ
= 3A
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A: V
B: Inductor Current, 1 A/div
C: Output Ripple Voltage, 20 mV/div AC-Coupled
SW
Pin Voltage, 10 V/div.
Discontinuous Mode Switching Waveforms
L = 10 μH, C
V
IN
Horizontal Time Base: 1 μs//iv
= 20V, V
OUT
OUT
= 400 μF, C
= 5V, I
LOAD
OUT
ESR = 13 mΩ
= 500 mA
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