LM5020EVAL National Semiconductor, LM5020EVAL Datasheet - Page 4

• Manufacturer Part Number: LM5020EVAL
• Description: EVALUATION BOARD FOR LM5020
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LM5020EVAL

• Main Purpose: DC/DC, Step Down
• Outputs And Type: 1, Isolated
• Voltage - Output: 3.3V
• Current - Output: 4.5A
• Voltage - Input: 30 ~ 75V
• Regulator Topology: Buck
• Board Type: Fully Populated
• Utilized Ic / Part: LM5020
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -
• Frequency - Switching: -
• Other names: *LM5020EVAL

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Performance Characteristics
Trace 1: Input Voltage, at 30VDC.
Volts/div = 20.0V
Trace 2: Output Voltage, at full load.
Volts/div = 2.0V
Trace 3: Output Current, at full load.
Amps/div = 2.0A
Horizontal Resolution = 1.0ms/div
Trace 1: V
Volts/div = 5.0V
Trace 2: V
Volts/div = 20.0V
Horizontal Resolution = 2.0ms/div
LOAD STEP RESPONSE
Figure 5 shows the load step response at Vin = 30VDC for
an instantaneous load change from 5% to full load. The input
voltage, output voltage and output current are shown.
RIPPLE VOLTAGE AND RIPPLE CURRENT
Figure 6 shows the output ripple voltage, the output ripple
current and the input ripple current relative to the LM5020
gate drive.
(Continued)
CC
IN
approaching 30VDC
pin with V
IN
= 30VDC, Load = 4.5A
FIGURE 3.
FIGURE 4.
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4
Trace 1: Input Voltage, at 30VDC
Volts/div = 20.0V
Trace 2: Output Voltage, at 3.3VDC
Volts/div = 2.0V
Trace 3: Load changing from 0.23A to 4.5A instantaneously
Amps/div = 2.0A
Horizontal Resolution = 1.0ms/div
Trace 1: Q1 gate drive at Vin = 48VDC
Volts/div = 20.0V
Trace 2: Output ripple voltage
Volts/div = 100mV
Trace 3: Output ripple current
Amps/div = 20.0mA
Trace 4: Input ripple current
Amps/div = 100mA
Horizontal Resolution = 2.0µs/div
FIGURE 5.
FIGURE 6.
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