LM5030EVAL National Semiconductor, LM5030EVAL Datasheet - Page 2

• Manufacturer Part Number: LM5030EVAL
• Description: EVALUATION BOARD FOR LM5030
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LM5030EVAL

• Main Purpose: DC/DC, Step Down
• Outputs And Type: 1, Isolated
• Voltage - Output: 3.3V
• Current - Output: 10A
• Voltage - Input: 36 ~ 75V
• Regulator Topology: Buck
• Board Type: Fully Populated
• Utilized Ic / Part: LM5030
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• Power - Output: -
• Frequency - Switching: -
• Other names: *LM5030EVAL

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Board Layout and Probing
Board Connections/Start-Up
The input connection to the board from a power supply is
made to connector J1. The power supply must be capable of
supplying not only the current during normal operation, but
also the inrush current during start-up. For example, if the
load current is set to be 1.0A, the inrush current will be
approximately 250 mA peak. If the load is set to 10A, the
inrush current will be approximately 1.7A peak. Once the
circuit is on and operating normally, the current draw from
the power supply is a function of both the load current, and
the input voltage, as shown in Figure 2.
The load is connected to the J2 and J3 connectors. Two
connectors are provided to accommodate adequately sized
wires. With a load current of 10A, the load connections
should use a minimum of 16 gauge wire, preferably larger.
FIGURE 1. Evaluation Board Pictorial
(Continued)
2
Before start-up, a voltmeter should be connected to the input
terminals, and one to the output terminals. The input current
should be monitored with either an ammeter, or a current
probe. Upon turning on the power supply, these three meters
should be immediately checked to ensure their readings are
nominal.
Performance
Once the circuit is powered up and operating normally, the
output voltage will be regulated to +3.3V, with the accuracy
determined by the accuracy of the LM3411 regulator driver.
As the load current is varied from 1.0 to 10A, the output is
regulated to within +/-30 mV (+/- 1.0%). For a given load
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