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LM317HVKSTEEL датащи(PDF) 11 Page - Texas Instruments

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номер детали LM317HVKSTEEL
подробное описание детали  High Voltage Three-Terminal Adjustable Regulator With Overload Protection
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производитель  TI1 [Texas Instruments]
домашняя страница  http://www.ti.com
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LM317HVKSTEEL датащи(HTML) 11 Page - Texas Instruments

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OUT
ADJ
R
V
= 1.25 V
I
R
R
2
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LM317HV-MIL
www.ti.com
SNVSAY1 – JUNE 2017
Product Folder Links: LM317HV-MIL
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Copyright © 2017, Texas Instruments Incorporated
8 Application and Implementation
NOTE
Information in the following applications sections is not part of the TI component
specification, and TI does not warrant its accuracy or completeness. TI’s customers are
responsible for determining suitability of components for their purposes. Customers should
validate and test their design implementation to confirm system functionality.
8.1 Application Information
The LM317HV-MIL is a high voltage input capable linear regulator with overload protection. Due to its wide input
voltage range, the LM317HV-MIL serves a variety of applications and provides a precise voltage regulation with
low dropout across a wide output voltage and load current range. The device regulates a constant 1.25 V
between VOUT and ADJ, so placing a fixed resistor between these pins provides a constant current regulation.
Capacitors at the input help filter the input power supply, while the output capacitors aid in transient response
stability. A bypass capacitor can be placed between ADJ pin and ground (across R2) to improve ripple rejection.
8.2 Typical Applications
8.2.1 1.25-V to 45-V High Voltage Adjustable Regulator
The device can be used as an adjustable regulator to allow a variety of output voltages for high voltage
applications. By using an adjustable R2 resistor, a variety of output voltages can be made possible as shown in
Figure 16.
Full output current not available at high input-output voltages
†Optional—improves transient response. Output capacitors in the range of 1 μF to 1000 μF of aluminum or tantalum
electrolytic
are commonly used to provide improved output impedance and rejection of transients.
*Needed if device is more than 6 inches from filter capacitors.
††
Figure 16. 1.25-V to 45-V High Voltage Adjustable Regulator
8.2.1.1 Design Requirements
The device component count is very minimal, employing two resistors as part of a voltage divider circuit and an
output capacitor for load regulation. An input capacitor is needed if the device is more than 6 inches from filter
capacitors. An optional bypass capacitor across R2 can also be used to improve PSRR.


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