LM2594/LM2594HV
Typical Performance Characteristics
Continuous Mode Switching Waveforms
V
IN
= 20V, V
OUT
= 5V, I
LOAD
= 400 mA
L = 100 µH, C
OUT
= 120 µF, C
OUT
ESR = 140 mΩ
Discontinuous Mode Switching Waveforms
V
IN
= 20V, V
OUT
= 5V, I
LOAD
= 200 mA
L = 33 µH, C
OUT
= 220 µF, C
OUT
ESR = 60 mΩ
DS012439-17
A: Output Pin Voltage, 10V/div.
B: Inductor Current 0.2A/div.
C: Output Ripple Voltage, 20 mV/div.
DS012439-18
Horizontal Time Base: 2 µs/div.
A: Output Pin Voltage, 10V/div.
B: Inductor Current 0.2A/div.
C: Output Ripple Voltage, 20 mV/div.
Horizontal Time Base: 2 µs/div.
Load Transient Response for Continuous Mode
V
IN
= 20V, V
OUT
= 5V, I
LOAD
= 200 mA to 500 mA
L = 100 µH, C
OUT
= 120 µF, C
OUT
ESR = 140 mΩ
Load Transient Response for Discontinuous Mode
V
IN
= 20V, V
OUT
= 5V, I
LOAD
= 100 mA to 200 mA
L = 33 µH, C
OUT
= 220 µF, C
OUT
ESR = 60 mΩ
DS012439-20
DS012439-19
A: Output Voltage, 50 mV/div. (AC)
B: 200 mA to 500 mA Load Pulse
A: Output Voltage, 50 mV/div. (AC)
B: 100 mA to 200 mA Load Pulse
Horizontal Time Base: 50 µs/div.
Horizontal Time Base: 200 µs/div.
7
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