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CS8121YDPSR7 датащи(PDF) 1 Page - ON Semiconductor

номер детали CS8121YDPSR7
подробное описание детали  5V, 1A Linear Regulator
Download  8 Pages
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производитель  ONSEMI [ON Semiconductor]
домашняя страница  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

CS8121YDPSR7 датащи(HTML) 1 Page - ON Semiconductor

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1
Features
s
5V ± 4% Output Voltage
s
Low Dropout Voltage
(1.2V @ 1A)
s
Low Quiescent Current
(4mA @ IOUT = 1A)
s
µP Compatible Control
Functions
s
Low Current Sleep Mode
IQ = 250µA
s
Fault Protection
Thermal Shutdown
Short Circuit
60V Peak Transient
Voltage
ENABLE
RESET
Package Options
5 Lead TO-220
1
5V, 1A Linear Regulator
with
and ENABLE
RESET
CS8121
Description
Block Diagram
1VIN
2
3 Gnd
4
5VOUT
RESET
ENABLE
7 Lead D2PAK
1
1NC
2VIN
3
4 Gnd
5
6VOUT
7VOUT(SENSE)
RESET
ENABLE
December, 2001 - Rev. 7
ON Semiconductor
2000 South County Trail, East Greenwich, RI 02818
Tel: (401)885–3600 Fax: (401)885–5786
N. American Technical Support: 800-282-9855
Web Site: www.cherry–semi.com
The CS8121 is a 5V, 1A precision linear
regulator with two microprocessor
compatible control functions and pro-
tection circuitry included on chip. The
composite NPN-PNP output pass tran-
sistor assures a lower dropout voltage
(1.2V @ 1A) without requiring exces-
sive supply current (4mA).
The CS8121’s two logic control func-
tions make this regulator well suited to
applications requiring microprocessor-
based control at the board or module
level.
controls the output
stage. A high voltage (>2.9V) on
the
lead turns off the regula-
tor’s pass transistor and sends the IC
into Sleep mode where it draws only
250µA.
sends a
signal
when the IC is powering up or when-
ever the output voltage falls out of reg-
ulation. The
signal is valid
down to VOUT = 1V.
The CS8121 design optimizes supply
rejection by switching the internal
bandgap reference from the supply
input to the regulator output as soon as
the nominal output voltage is achieved.
Additional on chip filtering enhances
rejection of high frequency transients
on all external leads.
The CS8121 is fault protected against
short circuit, over voltage and thermal
runaway conditions.
RESET
RESET
RESET
ENABLE
ENABLE
Over
Voltage
Shutdown
RESET
Comparator
Error
Amplifier
TO VOUT
+
+
-
VREF
ENABLE
Comparator
Bandgap
Supply
Output
Current
Limit
Bandgap
Reference
Thermal
Shutdown
-
VIN
ENABLE
RESET
VOUT
Gnd
VOUT(SENSE)
5 Lead
TO-220


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