LM2678-5.0 National Semiconductor, LM2678-5.0 Datasheet - Page 8

• Manufacturer Part Number: LM2678-5.0
• Description: SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator
• Manufacturer: National Semiconductor

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Typical Performance Characteristics
A: V
B: Inductor Current, 2 A/div
C: Output Ripple Voltage, 20 mV/div AC-Coupled
A: Output Voltage, 100 mV//div, AC-Coupled.
B: Load Current: 500 mA to 5A Load Pulse
SW
Load Transient Response for Continuous Mode
L = 10 µH, C
L = 10 µH, C
Pin Voltage, 10 V/div.
Continuous Mode Switching Waveforms
Horizontal Time Base: 100 µs/div
V
Horizontal Time Base: 1 µs/div
IN
= 20V, V
V
OUT
OUT
IN
= 20V, V
= 400 µF, C
= 400 µF, C
OUT
= 5V, I
OUT
OUT
OUT
= 5V
LOAD
DS100886-17
DS100886-19
ESR = 13 m
ESR = 13 m
= 5A
A: V
B: Inductor Current, 1 A/div
C: Output Ripple Voltage, 20 mV/div AC-Coupled
A: Output Voltage, 100 mV/div, AC-Coupled.
B: Load Current: 200 mA to 3A Load Pulse
8
Load Transient Response for Discontinuous Mode
SW
L = 10 µH, C
L = 10 µH, C
Pin Voltage, 10 V/div.
Discontinuous Mode Switching Waveforms
V
IN
Horizontal Time Base: 200 µs/div
= 20V, V
Horizontal Time Base: 1 µs//iv
V
OUT
OUT
IN
= 20V, V
OUT
= 400 µF, C
= 400 µF, C
= 5V, I
OUT
LOAD
OUT
OUT
= 5V,
DS100886-18
DS100886-20
ESR = 13 m
ESR = 13 m
= 500 mA