Datasheet

LM2596
SNVS124C –NOVEMBER 1999–REVISED APRIL 2013 www.ti.com
Typical Performance Characteristics (continued)
(Circuit of Figure 20)
Continuous Mode Switching Waveforms
Feedback Pin V
IN
= 20V, V
OUT
= 5V, I
LOAD
= 2A
Bias Current L = 32 μH, C
OUT
= 220 μF, C
OUT
ESR = 50 mΩ
A: Output Pin Voltage, 10V/div.
B: Inductor Current 1A/div.
C: Output Ripple Voltage, 50 mV/div.
Figure 15. Figure 16. Horizontal Time Base: 2 μs/div.
Discontinuous Mode Switching Waveforms Load Transient Response for Continuous Mode
V
IN
= 20V, V
OUT
= 5V, I
LOAD
= 500 mA V
IN
= 20V, V
OUT
= 5V, I
LOAD
= 500 mA to 2A
L = 10 μH, C
OUT
= 330 μF, C
OUT
ESR = 45 mΩ L = 32 μH, C
OUT
= 220 μF, C
OUT
ESR = 50 mΩ
A: Output Voltage, 100 mV/div. (AC)
A: Output Pin Voltage, 10V/div.
B: 500 mA to 2A Load Pulse
B: Inductor Current 0.5A/div.
C: Output Ripple Voltage, 100 mV/div.
Figure 17. Horizontal Time Base: 2 μs/div. Figure 18. Horizontal Time Base: 100 μs/div.
Load Transient Response for Discontinuous Mode
V
IN
= 20V, V
OUT
= 5V, I
LOAD
= 500 mA to 2A
L = 10 μH, C
OUT
= 330 μF, C
OUT
ESR = 45 mΩ
A: Output Voltage, 100 mV/div. (AC)
B: 500 mA to 2A Load Pulse
Figure 19. Horizontal Time Base: 200 μs/div.
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