Linear LM317 monolithic integrated circuit 220, TO-252, SOT-223 D2PAK

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Linear LM317 monolithic integrated circuit 220, TO-252, SOT-223 D2PAK

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3-Terminal 1.5Amp Adjustable Voltage Regulator Description
Linear LM317 monolithic integrated circuit 220, TO-252, SOT-223 D2PAK packages intended positive adjustable voltage regulators. They designed supply more than 1.5A load current with output voltage adjustable over range. nominal output voltage selected means only resistive divider, making device exceptionally easy eliminating stocking many fixed regulators.
LM317
Features
Output Current 1.5A Output Voltage Tolerance Adjustable Output 1.2V 0.1% Load Line Regulation Internal Short-Circuit Limited Current Limit Offer plastic TO-252, TO-220, SOT-223 TO-263 Direct Replacement LM317
Applications
Post regulator switching DC/DC converter Bias supply analog circuits
Packaging Information
Ordering Information
Device
LM317T LM317N LM317S LM317D
TO-263-3
Package Type
TO-220 SOT-223 TO-263 TO-252
Output
Output Input
SOT-223 TO-252 Package
View
Linear,
2418 Armstrong Street, Livermore, 94550 Tel: (925) 606-5950, Fax: (925) 940-9556
www.baylinear.com
LM317
Absolute Maximum Rating
Parameter
Power Dissipation Input Voltage Differential Operating Free-Air, Case, Virtual Junction Temp. Storage Temperature Range Lead temperature from case sec.
LM317
Internally Limited +40V, -0.3V
Unit
Electrical Characteristics (LM317)
Parameter
Reference Voltage Line Regulation Load Regulation Ripple Rejection
Symbol
Conditions
3V(VIN-VOUT) 10mAIOUTIMAX, PPMAX 3V(VIN-VOUT) (Note 10mAIOUT IMAX (Note 10V,, f=120Hz CADJ=0µF 10V,, f=120Hz CADJ=10µF 20ms
1.20
1.25 0.01 0.02
1.30 0.02 0.05
UNIT
0.03 0.003 0.07
Thermal Regulation Adjustment Current Adjustment Current Change Temperature Stability Long Term Stability Output Noise VOUT Minimum Load Current Maximum Load Current
10mAIOUTIMAX, 3V(VIN-VOUT) TMINTJTMAX TJ=125°C, 1000 10Hzf10KHz (VIN-VOUT) =40V (VIN-VOUT) PDPMAX (VIN-VOUT) PDPMAX
Linear,
2418 Armstrong Street, Livermore, 94550 Tel: (925) 606-5950, Fax: (925) 940-9556
www.baylinear.com
LM317
Application Notes:
LM317 provides internal reference voltage 1.25V between output adjustments terminals. This used constant current flow across external resistor divider show below, giving output voltage VREF IADJ device designed minimize term IADJ max) maintain very constant with line load changes. Usually, error term IADJ neglected. obtain previous requirement, regulator quiescent current returned output terminal, imposing minimum load current condition. load insufficient, output voltage will rise. Since LM317 floating regulator sees" only input- tooutput differential voltage, supplies very high voltage with respect ground regulated long maximum input- output differential exceeded. Furthermore, programmable regulator easily obtainable and, connecting fixed resistor between adjustment output, device used precision current regulator. order optimise load regulation, current resistor show below should tied close possible regulator, while ground terminal should near ground load provide remote ground sensing. Performance improved with added capacitance follow: input bypass capacitor 0.1µF adjustment terminal ground 10µF capacitor improve ripple rejection about CADJ). tantalium µFAluminium electrolitic) capacitor output improve transient response. additional external capacitors, good practice protection diodes, shown below. protect device against input short circuit, while protect against output short circuit capacitance discharging.
Linear,
2418 Armstrong Street, Livermore, 94550 Tel: (925) 606-5950, Fax: (925) 940-9556
www.baylinear.com
Advance Information- These data sheets contain descriptions products that development. specifications based engineering calculations, computer simulations and/ initial prototype evaluation. Preliminary Information- These data sheets contain minimum maximum specifications that based initial device characterizations. These limits subject change upon completion full characterization over specified temperature supply voltage ranges.
application circuit examples only explain representative applications devices intended guarantee circuit design permit industrial property right other rights execute. Linear takes responsibility problems related industrial property right resulting from contents shown data book. Typical parameters vary different applications. Customer's technical experts must validate operating parameters including Typical" each customer application.
LIFE SUPPORT NUCLEAR POLICY Linear products authorized should used within life support systems which intended surgical implants into body support sustain life, aircraft, space equipment, submarine, nuclear facility applications without specific written consent Linear President.
Linear,
2418 Armstrong Street, Livermore, 94550 Tel: (925) 606-5950, Fax: (925) 940-9556
www.baylinear.com

Linear LM317 monolithic integrated circuit 220, TO-252, SOT-223 D2PAK

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