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CS8101YDWFR20 Arkusz danych(PDF) 3 Page - Cherry Semiconductor Corporation

Numer części CS8101YDWFR20
Szczegółowy opis  Micropower 5V, 100mA Low Dropout Linear Regulator with RESET and ENABLE
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Producent  CHERRY [Cherry Semiconductor Corporation]
Strona internetowa  http://www.cherrycorp.com/
Logo CHERRY - Cherry Semiconductor Corporation

CS8101YDWFR20 Arkusz danych(HTML) 3 Page - Cherry Semiconductor Corporation

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Output Stage Protection
The output stage is protected against overvoltage, short
circuit and thermal runaway conditions (Figure 1).
Figure 1. Typical Circuit Waveforms for Output Stage Protection.
If the input voltage rises above 30V (e.g. load dump), the out-
put shuts down. This response protects the internal circuitry
and enables the IC to survive unexpected voltage transients.
Should the junction temperature of the power device exceed
180ûC (typ) the load current capability is reduced thereby
preventing thermal overload. This thermal management
function is an effective means to prevent die overheating
since the load current is the principle heat source in the IC.
The CS8101 contains two microprocessor compatible con-
trol functions:
and
(Figure 2).
Figure 2. Circuit Waveform
Function
The
function switches the output transistor ON
and OFF. When the voltage on the
lead exceeds
1.4V typ, the output pass transistor turns off, leaving a
high impedance facing the load. The IC will remain in
Sleep mode, drawing only 50µA, until the voltage on this
input drops below the
threshold.
Function
A
signal (low voltage) is generated as the IC pow-
ers up until VOUT is within 250mV of the regulated output
voltage, or when VOUT drops out of regulation,and is
lower than 300mV below the regulated output voltage. A
hysteresis of 50mV is included in the function to minimize
oscillations.
The
output is an open collector NPN transistor,
controlled by a low voltage detection circuit. The circuit is
functionally independent of the rest of the IC thereby
guaranteeing that the
signal is valid for VOUT as low
as 1V.
RESET
RESET
RESET
RESET
ENABLE
ENABLE
ENABLE
ENABLE
(1) = NO RESET DELAY CAPACITOR
(2) = WITH RESET DELAY CAPACITOR
FOR 7V < VIN < 26V
VOUT
VRH
ENABLE
VRL
(1)
(2)
VIN
VIN
H
VR PEAK
VRLO
VR PEAK
RESET
RESET
ENABLE
Regulator Control Functions
IOUT
VOUT
VIN
Load
Dump
Short
Circuit
Current
Limit
> 30V
Voltage Reference and Output Circuitry
3
Package Lead Description
PACKAGE LEAD #
LEAD SYMBOL
FUNCTION
Circuit Description
8 Lead
20 Lead SOIC
5 Lead
SOIC
(Internally Fused Leads)
TO-220
819
5
VIN
Input voltage.
120
1
VOUT
5V, ±2%, 100mA output.
3
1
2
Logic level switches output off when toggled HIGH.
4
4,5,6,7
3
Gnd
Ground. All Gnd leads must be connected to Ground.
14,15,16,17
5
10
4
Active reset (accurate to VOUT ³ 1V).
2VOUTSense
Kelvin connection which allows remote sensing of out-
put voltage for improved regulation. If remote sensing
is not required, connect to VOUT.
6,7
2,3,8,9,11,12,13,18
NC
No Connection.
RESET
ENABLE


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