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CS8135 датащи(PDF) 5 Page - Cherry Semiconductor Corporation

номер детали CS8135
подробное описание детали  5V, 5V Low Dropout Dual Regulator with /ENABLE RESET
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производитель  CHERRY [Cherry Semiconductor Corporation]
домашняя страница  http://www.cherrycorp.com/
Logo CHERRY - Cherry Semiconductor Corporation

CS8135 датащи(HTML) 5 Page - Cherry Semiconductor Corporation

  CS8135 Datasheet HTML 1Page - Cherry Semiconductor Corporation CS8135 Datasheet HTML 2Page - Cherry Semiconductor Corporation CS8135 Datasheet HTML 3Page - Cherry Semiconductor Corporation CS8135 Datasheet HTML 4Page - Cherry Semiconductor Corporation CS8135 Datasheet HTML 5Page - Cherry Semiconductor Corporation CS8135 Datasheet HTML 6Page - Cherry Semiconductor Corporation CS8135 Datasheet HTML 7Page - Cherry Semiconductor Corporation CS8135 Datasheet HTML 8Page - Cherry Semiconductor Corporation  
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VIN
SWITCH
VOUT
1
RESET
VOUT
2
System
Condition
5V
0V
0V
OPEN
14V
5V
5V
60V
31V
3V
2.4V
26V
CLOSED
5V
0V
2.4V
Turn
On
Load
Dump
Low VIN
Line, Noise, Etc.
VOUT1
Short
Circuit
Thermal
Shutdown
Turn
Off
5V
5V
5V
0V
OPEN
14V
5V
Typical Circuit Waveform
*Reference Test & Application Circuit
The CS8135 is equipped with two outputs. The second out-
put is intended for use in systems requiring standby mem-
ory circuits. While the high current regulator output can be
controlled with the
lead described below, the stand-
by output remains on under all conditions as long as suffi-
cient input voltage is applied to the IC. Thus, memory and
other circuits powered by this output remain unaffected by
positive line transients, thermal shutdown, etc.
The standby regulator circuit is designed so that the quies-
cent current to the IC is very low (<3mA) when the other
regulator output is off.
In applications where the standby output is not needed, it
may be disabled by connecting a resistor from the standby
output to the supply voltage. This eliminates the need for
a capacitor on the output to prevent unwanted oscilla-
tions. The value of the resistor depends upon the mini-
mum input voltage expected for a given system. Since the
standby output is shunted with an internal diode zener,
the current through the external resistor should be suffi-
cient to bias VOUT2 up to this point. Approximately 60µA
will suffice, resulting in a 10k½ external resistor for most
applications.
RESET
Standby Output
5
Circuit Description
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 Voltage
The DC voltage applied to the input 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 condi-
tions 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 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.
Temperature Stability of VOUT
The percentage change in output voltage for a thermal
variation from room temperature to either temperature
extreme.
Current Limit
Peak current that can be delivered to the output.
Definition of Terms


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