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CS8391 데이터시트(PDF) 3 Page - Cherry Semiconductor Corporation

부품명 CS8391
상세설명  5V/250mA, 5V/100mA Micropower Low Dropout Regulator with ENABLE
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제조업체  CHERRY [Cherry Semiconductor Corporation]
홈페이지  http://www.cherrycorp.com/
Logo CHERRY - Cherry Semiconductor Corporation

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Definition of Terms
3
VIN
ENABLE
VOUT
1
System
Condition
45V
3V
2.4V
5V
0V
Turn
On
Load
Dump
Low VIN
Line Noise, Etc.
VOUT2
Short
Circuit
Thermal
Shutdown
Turn
Off
5V
0V
14V
5V
2.0V
0.8V
14V
26V
31V
5V
5V
2.4V
5V
5V
5V
0V
VOUT
2
5V
5V
0V
5V
VOUT
1
Short
Circuit
0V
5V
5V
Typical Circuit Waveform
PACKAGE LEAD #
LEAD SYMBOL
FUNCTION
Package Lead Description
5 Lead D2PAK
1VIN
Supply voltage to IC, usually direct from battery.
2VOUT1
5V regulated output which is activated by ENABLE input.
3
Gnd
Ground connection.
4VOUT2
Standby output 5V, 100mA capability; always on.
5
ENABLE
CMOS compatible input lead; switches VOUT1. When ENABLE is
high, VOUT1 is active.
Current Limit
Peak current that can be delivered to the output.
Dropout Voltage
The input-output voltage differential at which the circuit
ceases to regulate against further reduction in input volt-
age. Measured when the output voltage has dropped
100mV from the nominal value obtained at 14V input,
dropout voltage is dependent upon load current and junc-
tion temperature.
Input Output Differential
The voltage difference between the unregulated input volt-
age and the regulated output voltage for which the regula-
tor will operate.
Input Voltage
The DC voltage applied to the input terminals with respect
to ground.
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 condi-
tions after 1000 hours with maximum rated voltage and
junction temperature.
Quiescent Current
The part of the positive input current that does not con-
tribute to the positive load current. i.e., 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.
Short Circuit Current Limit
Peak current that can be delivered by the output when
forced to 0V.
Temperature Stability of VOUT
The percentage change in output voltage for a thermal varia-
tion from room temperature to either temperature extreme.


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