LM5010 EVAL National Semiconductor, LM5010 EVAL Datasheet - Page 16

• Manufacturer Part Number: LM5010 EVAL
• Description: BOARD EVALUATION LM5010
• Manufacturer: National Semiconductor

Specifications of LM5010 EVAL

• Main Purpose: DC/DC, Step Down
• Outputs And Type: 1, Non-Isolated
• Voltage - Output: 10V
• Current - Output: 1A
• Voltage - Input: 12 ~ 75V
• Regulator Topology: Buck
• Frequency - Switching: 480kHz
• Board Type: Fully Populated
• Utilized Ic / Part: LM5010
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• Power - Output: -

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FIGURE 16. Efficiency vs Load Current and V
FIGURE 15. Efficiency vs V
Circuit of Figure 14
Circuit of Figure 14
IN
(Continued)
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IN
16
INCREASING THE CURRENT LIMIT THRESHOLD
The current limit threshold is nominally 1.25A, with a mini-
mum guaranteed value of 1.0A. If, at maximum load current,
the lower peak of the inductor current (I
exceeds 1.0A, resistor R
and I
exceed that lower peak current. This resistor diverts some of
the recirculating current from the internal sense resistor so
that a higher current level is needed to switch the internal
current limit comparator. I
where I
the minimum ripple current calculated using Equation 10.
R
CL
is calculated from:
SEN
O(max)
FIGURE 17. Output Voltage Ripple vs V
to increase the current limit threshold to equal or
FIGURE 18. Frequency vs V
is the maximum load current, and I
Circuit of Figure 14
Circuit of Figure 14
CL
PK-
must be added between S
is calculated from:
PK-
IN
in Figure 13)
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IN
OR(min)
GND
(11)
is