LM5007EVAL/NOPB National Semiconductor, LM5007EVAL/NOPB Datasheet - Page 7
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LM5007EVAL/NOPB
Manufacturer Part Number
LM5007EVAL/NOPB
Description
EVALUATION BOARD FOR LM5007
Manufacturer
National Semiconductor
Specifications of LM5007EVAL/NOPB
Main Purpose
DC/DC, Step Down
Outputs And Type
1, Non-Isolated
Voltage - Output
10V
Current - Output
400mA
Voltage - Input
12 ~ 75V
Regulator Topology
Buck
Board Type
Fully Populated
Utilized Ic / Part
LM5007
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power - Output
-
Frequency - Switching
-
Lead Free Status / Rohs Status
Compliant
Other names
*LM5007EVAL
*LM5007EVAL/NOPB
LM5007EVAL
*LM5007EVAL/NOPB
LM5007EVAL
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LM5007EVAL/NOPB
Manufacturer:
National Semiconductor
Quantity:
135
Over-Voltage Comparator
The over-voltage comparator is provided to protect the output
from overvoltage conditions due to sudden input line voltage
changes or output loading changes. The over-voltage com-
parator monitors the FB pin versus an internal 2.875V refer-
ence (OV_REF). If the voltage at FB rises above OV_REF the
comparator immediately terminates the buck switch on time
pulse.
FIGURE 1. Low Ripple Output Configuration
FIGURE 2. Self Biased Configuration
7
ON Time generator and Shutdown
The on time of the LM5007 is set inversely proportional to the
input voltage by an external resistor connected between Ron
and Vin. The Ron terminal is a low impedance input biased at
approximately 1.5V. Thus the current through the resistor and
into the Ron terminal is approximately proportional to Vin and
used internally to control the on timer. This scheme of input
voltage feed-forward hysteretic operation achieves nearly
constant operational frequency over varying line and load
conditions. The on time equation for the LM5007 is :
20078306
20078305
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