MC7918CT Fairchild Semiconductor, MC7918CT Datasheet - Page 10

• Manufacturer Part Number: MC7918CT
• Description: Linear Regulators - Standard TO-220 1A Neg Volt
• Manufacturer: Fairchild Semiconductor

Specifications of MC7918CT

• Polarity: Negative
• Number Of Outputs: 1
• Output Type: Fixed
• Output Voltage: - 18 V
• Output Current: 1 A
• Line Regulation: 360 mV
• Load Regulation: 360 mV
• Dropout Voltage (max): 2 V
• Input Voltage Max: - 35 V
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: 0 C
• Package / Case: TO-220
• Mounting Style: Through Hole
• Output Voltage Tolerance: +/- 4 %
• Voltage Regulation Accuracy: 4 %
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

change in the input voltage. The measurement is made under
conditions of low dissipation or by using pulse techniques
such that the average chip temperature is not significantly
affected.
change in load current at constant chip temperature.
device dissipation for which the regulator will operate
within specifications.
Line Regulation − The change in output voltage for a
Load Regulation − The change in output voltage for a
Maximum Power Dissipation − The maximum total
80
70
60
50
40
30
Figure 11. D
0
Power Dissipation versus P.C.B. Copper Length
Vertically
Mounted
Free Air
5.0
2
PAK Thermal Resistance and Maximum
L, LENGTH OF COPPER (mm)
10
http://onsemi.com
MC7900 Series
DEFINITIONS
Minimum
Size Pad
P
R
D(max)
15
qJA
10
is not delivered to the load.
output, with constant load and no input ripple, measured
over a specified frequency range.
accelerated life test conditions with the maximum rated
voltage listed in the devices’ electrical characteristics and
maximum power dissipation.
for T
Input Bias Current − That part of the input current that
Output Noise Voltage − The rms AC voltage at the
Long Term Stability − Output voltage stability under
A
20
= +50°C
L
2.0 oz. Copper
Î Î Î
Î Î Î
Î Î Î
Î Î Î
25
L
30
3.5
3.0
2.5
2.0
1.5
1.0