lm2679sx-3.3 National Semiconductor Corporation, lm2679sx-3.3 Datasheet - Page 7
lm2679sx-3.3
Manufacturer Part Number
lm2679sx-3.3
Description
Simple Switcher 5a Step-down Voltage Regulator With Adjustable Current Limit
Manufacturer
National Semiconductor Corporation
Datasheet
1.LM2679SX-3.3.pdf
(26 pages)
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A: V
B: Inductor Current, 2 A/div
C: Output Ripple Voltage, 20 mV/div AC-Coupled
SW
Pin Voltage, 10 V/div.
L = 10 μH, C
Continuous Mode Switching Waveforms
V
Horizontal Time Base: 1 μs/div
IN
= 20V, V
Switching Frequency
OUT
= 400 μF, C
OUT
= 5V, I
OUT
LOAD
ESR = 13 mΩ
= 5A
10084715
10084712
7
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
Feedback Pin Bias Current
OUT
OUT
= 400 μF, C
= 5V, I
LOAD
OUT
ESR = 13 mΩ
= 500 mA
10084716
10084713
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