LP2950CDT-3.0G datasheet(6/24 Pages) ONSEMI

Part #	LP2950CDT-3.0G

Description	100 mA, Low Power Low Dropout Voltage Regulator

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LP2950, LP2951, NCV2951

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DEFINITIONS

Dropout Voltage − The input/output voltage differential

at which the regulator output no longer maintains regulation

against further reductions in input voltage. Measured when

the output drops 100 mV below its nominal value (which is

measured at 1.0 V differential), dropout voltage is affected

by junction temperature, load current and minimum input

supply requirements.

Line Regulation − The change in output voltage for a

change in input voltage. The measurement is made under

conditions of low dissipation or by using pulse techniques

such that average chip temperature is not significantly

affected.

Load Regulation − The change in output voltage for a

change in load current at constant chip temperature.

Maximum Power Dissipation − The maximum total

device dissipation for which the regulator will operate

within specifications.

Bias Current − Current which is used to operate the

regulator chip and is not delivered to the load.

Output Noise Voltage − The RMS ac voltage at the

output, with constant load and no input ripple, measured

over a specified frequency range.

Leakage Current − Current drawn through a bipolar

transistor collector−base junction, under a specified

collector voltage, when the transistor is “off”.

Upper Threshold Voltage − Voltage applied to the

comparator input terminal, below the reference voltage

which is applied to the other comparator input terminal,

which causes the comparator output to change state from a

logic “0” to “1”.

Lower Threshold Voltage − Voltage applied to the

comparator input terminal, below the reference voltage

which is applied to the other comparator input terminal,

which causes the comparator output to change state from a

logic “1” to “0”.

Hysteresis − The difference between Lower Threshold

voltage and Upper Threshold voltage.

25

°C

Figure 2. Quiescent Current

−50

5.00

0

6.0

0.1

10

TA, AMBIENT TEMPERATURE (°C)

Vin, INPUT VOLTAGE (V)

IL, LOAD CURRENT (mA)

Figure 3. 5.0 V Dropout Characteristics over

Load

Figure 4. Output Voltage versus Temperature

1.0

10

100

1.0

2.0

3.0

4.0

5.0

6.0

0

50

100

150

1.0

0.1

0.01

5.0

4.0

3.0

2.0

1.0

0

4.99

4.98

4.97

4.96

4.95

RL = 50 kW

RL = 50 W

LP2951C

TA = 25°C

LP2951C

200

0

6.0

Vin, INPUT VOLTAGE (V)

Figure 5. 5.0 V Dropout Characteristics with

RL = 50 W

1.0

2.0

3.0

4.0

5.0

3.0

2.0

1.0

0

6.0

5.0

4.0

125

°C

−40

°C

LP2951C

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LP2950CDT-3.0G Datasheet(PDF) 6 Page - ON Semiconductor

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