CS8147 查看數據表（PDF） - ON Semiconductor

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CS8147

10 V/5.0 V Low Dropout Dual Regulator with ENABLE

ON Semiconductor 

CS8147

DEFINITION OF TERMS

Dropout Voltage – The input–output voltage differential

at which the circuit ceases to regulate against further

reduction in input voltage. Measured when the output

voltage has dropped 100 mV from the nominal value

obtained at 14 V input, dropout voltage is dependent upon

load current and junction temperature.

Current Limit – Peak current that can be delivered to the

output.

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 voltage 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

conditions 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.

Long Term Stability – Output voltage stability under

accelerated 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 specified frequency range.

Quiescent Current – The part of the positive input

current that does not contribute to the positive load current.

The regulator 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 VOUT – The percentage

change in output voltage for a thermal variation from room

temperature to either temperature extreme.

60 V

31 V

26 V

14V

VIN 14 V

5.0 V

ENABLE 2.0 V

0.8 V

VOUT1 0 V

VOUT2

0V

10 V

5.0 V

10 V

5.0 V

5.0 V 3.0 V

10 V

0V

5.0 V

0V

Turn

On

Load

Dump

Low VIN

Line

Noise, Etc.

VOUT

Short

Circuit

Figure 14. Typical Circuit Waveform

10 V

10 V

0V

0V

5.0 V

5.0 V

0V

0V

Thermal

Shutdown

Turn

Off

Control

C1*

0.1 µF

VIN

ENABLE

VOUT1

GND

VOUT2

10V

C2**

10 µF

5.0V

Tuner IC

* C1 is required if the regulator is located away from the power source filter.

** C2 is required for stability.

Figure 15. Test & Applications Circuit

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