參數資料
型號: LM2679
文件頁數: 8/25頁
文件大?。?/td> 495K
代理商: LM2679
Typical Performance Characteristics
(Circuit of Figure 2)
Continuous Mode Switching Waveforms
V
= 20V, V
OUT
= 5V, I
= 500 mA
L = 100 μH, C
OUT
= 100 μF, C
OUT
ESR = 0.1
Discontinuous Mode Switching Waveforms
V
= 20V, V
= 5V, I
= 300 mA
L = 15 μH, C
OUT
= 68 μF (2x), C
OUT
ESR = 25 m
10004218
Horizontal Time Base: 1 μs/div
A: V
SW
Pin Voltage, 10 V/div.
B: Inductor Current, 0.2 A/div
C: Output Ripple Voltage, 50 mV/div AC-Coupled
10004219
Horizontal Time Base: 1 μs/div
A: V
SW
Pin Voltage, 10 V/div.
B: Inductor Current, 0.5 A/div
C: Output Ripple Voltage, 20 mV/div AC-Coupled
Load Transient Response for Continuous Mode
V
IN
= 20V, V
= 5V
L = 100 μH, C
OUT
= 100 μF, C
OUT
ESR = 0.1
Load Transient Response for Discontinuous Mode
V
IN
= 20V, V
= 5V,
L = 47 μH, C
OUT
= 68 μF, C
OUT
ESR = 50 m
10004220
Horizontal Time Base: 50 μs/div
A: Output Voltage, 100 mV/div, AC-Coupled
B: Load Current: 100 mA to 500 mA Load Pulse
10004221
Horizontal Time Base: 200 μs/div
A: Output Voltage, 100 mV/div, AC-Coupled
B: Load Current: 100 mA to 400 mA Load Pulse
L
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