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LM317LCPW Folha de dados(PDF) 1 Page - Texas Instruments

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Nome de Peças LM317LCPW
Descrição Electrónicos  3-TERMINAL ADJUSTABLE REGULATOR
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Fabricante Electrônico  TI [Texas Instruments]
Página de início  http://www.ti.com
Logo TI - Texas Instruments

LM317LCPW Folha de dados(HTML) 1 Page - Texas Instruments

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LM317L
3TERMINAL ADJUSTABLE REGULATOR
SLCS144 − JULY 2004
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
D Output Voltage Range Adjustable From
1.2 V to 32 V When Used With an External
Resistor Divider
D Output Current Capability of 100 mA
D Input Regulation Typically 0.01% Per
Input-Voltage Change
D Output Regulation Typically 0.5%
D Ripple Rejection Typically 80 dB
D For Higher Output Current Requirements,
See LM317M (500 mA) and LM317 (1.5 A)
description/ordering information
The LM317L is an adjustable three-terminal
positive-voltage regulator capable of supplying
100 mA over an output-voltage range of 1.2 V to
32 V. It is exceptionally easy to use and requires
only two external resistors to set the output
voltage.
In addition to higher performance than fixed
regulators, this regulator offers full overload
protection, available only in integrated circuits. Included on the chip are current-limiting and thermal-overload
protection. All overload-protection circuitry remains fully functional, even when ADJUSTMENT is disconnected.
Normally, no capacitors are needed unless the device is situated far from the input filter capacitors, in which
case an input bypass is needed. An optional output capacitor can be added to improve transient response.
ADJUSTMENT can be bypassed to achieve very high ripple rejection, which is difficult to achieve with standard
three-terminal regulators.
In addition to replacing fixed regulators, the LM317L regulator is useful in a wide variety of other applications.
Since the regulator is floating and sees only the input-to-output differential voltage, supplies of several hundred
volts can be regulated as long as the maximum input-to-output differential is not exceeded. Its primary
application is that of a programmable output regulator, but by connecting a fixed resistor between
ADJUSTMENT and OUTPUT, this device can be used as a precision current regulator. Supplies with electronic
shutdown can be achieved by clamping ADJUSTMENT to ground, programming the output to 1.2 V, where most
loads draw little current.
The LM317LC is characterized for operation over the virtual junction temperature range of 0
°C to 125°C.
ORDERING INFORMATION
TJ
PACKAGE†
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
SOIC (D)
Tube of 75
LM317LCD
L317LC
SOIC (D)
Reel of 2500
LM317LCDR
L317LC
0
°C to 125°C
TO-226 / TO-92 (LP)
Bulk of 1000
LM317LCLP
L317LC
0
°C to 125°C
TO-226 / TO-92 (LP)
Reel of 2000
LM317LCLPR
L317LC
TSSOP (PW)
Tube of 150
LM317LCPW
L317LC
TSSOP (PW)
Reel of 2000
LM317LCPWR
L317LC
† Package drawings, standard packing quantities, thermal data, symbolization, and PCB design
guidelines are available at www.ti.com/sc/package.
Copyright
 2004, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
1
2
3
4
8
7
6
5
INPUT
OUTPUT
OUTPUT
ADJUSTMENT
NC
OUTPUT
OUTPUT
NC
D OR PW PACKAGE
(TOP VIEW)
LP PACKAGE
(TOP VIEW)
NC − No internal connection
OUTPUT terminals are all internally connected.
INPUT
OUTPUT
ADJUSTMENT


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