LM2941S National Semiconductor, LM2941S Datasheet - Page 7

• Manufacturer Part Number: LM2941S
• Description: IC, ADJ LDO REG, 5V TO 20V, 1A, TO-263-5
• Manufacturer: National Semiconductor

Specifications of LM2941S

• Primary Input Voltage: 26V
• Output Voltage Adjustable Range: 5V To 20V
• Dropout Voltage Vdo: 500mV
• No. Of Pins: 5
• Output Current: 1A
• Operating Temperature Range: -40°C To +85°C
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Definition of Terms
Dropout Voltage: The input-voltage differential at which the
circuit ceases to regulate against further reduction in input
voltage. Measured when the output voltage has dropped
100mV from the nominal value obtained at (V
dropout voltage is dependent upon load current and junction
temperature.
Input Voltage: The DC voltage applied to the input terminals
with respect to ground.
Input-Output Differential: The voltage difference between
the unregulated input voltage and the regulated output volt-
age for which the regulator will operate.
Line Regulation: The change in output voltage for a change
in the input voltage. The measurement is made under condi-
tions of low dissipation or by using pulse techniques such that
the average chip temperature is not significantly affected.
Load Regulation: The change in output voltage for a change
in load current at constant chip temperature.
Typical Applications
Note: Using 1k for R1 will ensure that the input bias current error of the adjust pin will be negligible. Do not bypass R1 or R2. This will lead to instabilities.
Maximum Power Dissipation (TO-263) (Note 4)
OUT
5V to 20V Adjustable Regulator
+ 5V) input,
7
Long Term Stability: Output voltage stability under accel-
erated life-test conditions after 1000 hours with maximum
rated voltage and junction temperature.
Output Noise Voltage: The rms AC voltage at the output,
with constant load and no input ripple, measured over a spec-
ified frequency range.
Quiescent Current: That part of the positive input current
that does not contribute to the positive load current. The reg-
ulator ground lead current.
Ripple Rejection: The ratio of the peak-to-peak input ripple
voltage to the peak-to-peak output ripple voltage.
Temperature Stability of V
output voltage for a thermal variation from room temperature
to either temperature extreme.
882329
882303
O
: The percentage change in
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