Datasheet

LM2591HV
www.ti.com SNVS074D –MAY 2001–REVISED APRIL 2013
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
(Circuit of Test Circuit and Layout Guidelines)
ON/OFF Pin Current (Sinking) Internal Gain-Phase Characteristics
Figure 14. Figure 15.
Continuous Mode Switching Waveforms Discontinuous Mode Switching Waveforms
V
IN
= 20V, V
OUT
= 5V, I
LOAD
= 1A V
IN
= 20V, V
OUT
= 5V, I
LOAD
= 250 mA
L = 52 μH, C
OUT
= 100 μF, C
OUT
ESR = 100 mΩ L = 15 μH, C
OUT
= 150 μF, C
OUT
ESR = 90 mΩ
A: Output Pin Voltage, 10V/div.
A: Output Pin Voltage, 10V/div.
B: Inductor Current 0.5A/div.
B: Inductor Current 0.25A/div.
C: Output Ripple Voltage, 50 mV/div.
C: Output Ripple Voltage, 100 mV/div.
Figure 16. Horizontal Time Base: 2 μs/div. Figure 17. Horizontal Time Base: 2 μs/div.
Load Transient Response for Continuous Mode Load Transient Response for Discontinuous Mode
V
IN
= 20V, V
OUT
= 5V, I
LOAD
= 250 mA to 1A V
IN
= 20V, V
OUT
= 5V, I
LOAD
= 250 mA to 1A
L = 52 μH, C
OUT
= 100 μF, C
OUT
ESR = 100 mΩ L = 15 μH, C
OUT
= 150 μF, C
OUT
ESR = 90 mΩ
A: Output Voltage, 100 mV/div. (AC)
B: 250 mA to 1A Load Pulse
A: Output Voltage, 100 mV/div. (AC)
B: 250 mA to 1A Load Pulse
Figure 18. Horizontal Time Base: 50 μs/div. Figure 19. Horizontal Time Base: 200 μs/div.
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