LM2678
Continuous Mode Switching Waveforms
V
IN
= 20V, V
OUT
= 5V, I
LOAD
= 5A
L = 10
μH,
C
OUT
= 400 μF,
C
OUT
ESR = 13 mΩ
Discontinuous Mode Switching Waveforms
V
IN
= 20V, V
OUT
= 5V, I
LOAD
= 500 mA
L = 10
μH,
C
OUT
= 400 μF,
C
OUT
ESR = 13 mΩ
10088617
10088618
A: V
SW
Pin Voltage, 10 V/div.
B: Inductor Current, 2 A/div
C: Output Ripple Voltage, 20 mV/div AC-Coupled
A: V
SW
Pin Voltage, 10 V/div.
B: Inductor Current, 1 A/div
C: Output Ripple Voltage, 20 mV/div AC-Coupled
Horizontal Time Base: 1
μs/div
Load Transient Response for Continuous Mode
V
IN
= 20V, V
OUT
= 5V
L = 10
μH,
C
OUT
= 400 μF,
C
OUT
ESR = 13 mΩ
Horizontal Time Base: 1
μs//iv
Load Transient Response for Discontinuous Mode
V
IN
= 20V, V
OUT
= 5V,
L = 10
μH,
C
OUT
= 400 μF,
C
OUT
ESR = 13 mΩ
10088619
10088620
A: Output Voltage, 100 mV//div, AC-Coupled.
B: Load Current: 500 mA to 5A Load Pulse
A: Output Voltage, 100 mV/div, AC-Coupled.
B: Load Current: 200 mA to 3A Load Pulse
Horizontal Time Base: 100
μs/div
Horizontal Time Base: 200
μs/div
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