lm2590hvtadj-aq National Semiconductor Corporation, lm2590hvtadj-aq Datasheet - Page 8

• Manufacturer Part Number: lm2590hvtadj-aq
• Description: Simple Switcher Power Converter 150 Khz 1a Step-down Voltage Regulator, With Features
• Manufacturer: National Semiconductor Corporation

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Typical Performance Characteristics
A: Output Pin Voltage, 10V/div.
B: Inductor Current 0.5A/div.
C: Output Ripple Voltage, 50 mV/div.
A: Output Voltage, 100 mV/div. (AC)
B: 250 mA to 1A Load Pulse
Load Transient Response for Continuous Mode
L = 52 µH, C
L = 52 µH, C
V
IN
Continuous Mode Switching Waveforms
= 20V, V
V
Horizontal Time Base: 50 µs/div.
Horizontal Time Base: 2 µs/div.
IN
= 20V, V
OUT
OUT
OUT
= 100 µF, C
= 100 µF, C
= 5V, I
OUT
= 5V, I
LOAD
OUT
OUT
= 250 mA to 1A
LOAD
ESR = 100 mΩ
ESR = 100 mΩ
= 1A
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(Circuit of Figure 1) (Continued)
8
A: Output Pin Voltage, 10V/div.
B: Inductor Current 0.25A/div.
C: Output Ripple Voltage, 100 mV/div.
A: Output Voltage, 100 mV/div. (AC)
B: 250 mA to 1A Load Pulse
Load Transient Response for Discontinuous Mode
L = 15 µH, C
L = 15 µH, C
Discontinuous Mode Switching Waveforms
V
IN
V
= 20V, V
IN
Horizontal Time Base: 200 µs/div.
Horizontal Time Base: 2 µs/div.
= 20V, V
OUT
OUT
OUT
OUT
= 150 µF, C
= 150 µF, C
= 5V, I
= 5V, I
LOAD
LOAD
OUT
OUT
= 250 mA to 1A
= 250 mA
ESR = 90 mΩ
ESR = 90 mΩ
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