LM317L View Datasheet(PDF) - Contek Microelectronics
Part Name
Description
Manufacturer
LM317L Datasheet PDF : 5 Pages
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LM317L
LINEAR INTEGRATED CIRCUIT
APPLICATION INFORMATION
The Contek LM317L provides an internal reference voltage of 1.25V between the output and adjustments terminals.
This is used to set a constant current flow across an external resistor divider, giving an output voltage VO of:
VO=VREF (1+R2/R1) + IADJ R2
The device is designed to minimize the term IADJ (100mA max) and to maintain it very constant with line and load
changes. Usually, the error term IADJ. R2 can be neglected. To obtain the previous requirement, all the regulator
quiescent current is returned to the output terminal, imposing a minimum load current condition. If the load is
insufficient, the output voltage will rise. The Contek LM317L is a floating regulator, input-output differential voltage ,
supplies of very high voltage with respect to ground can be regulated as long as the maximum input-output differential
is not exceeded. Furthermore, programmable regulators are easily obtainable and, by connecting a fixed resistor
between the adjustment and output, the device can be used as a precision current regulator.
BASIC ADJUSTABLE REGULATOR
Vi
3
Contek
LM317L
2
Vo
1
R1
Vref
I1
Iadj
R2
Contek Microelectronics Co.,Ltd.
4
CONTEK
http://www.contek-ic.com E-mail:sales@contek-ic.com
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