LM317

Manufacturer Part NumberLM317
DescriptionThis monolithic integrated circuit is an adjustable 3-terminal positive voltage regulator designed to supply more than 1
ManufacturerFairchild Semiconductor
LM317 datasheet
 


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LM317
3-Terminal Positive Adjustable Regulator
Features
• Output Current In Excess of 1.5A
• Output Adjustable Between 1.2V and 37V
• Internal Thermal Overload Protection
• Internal Short Circuit Current Limiting
• Output Transistor Safe Operating Area Compensation
• TO-220 Package
Internal Block Diagram
Vin
3
Input
©2011 Fairchild Semiconductor Corporation
Description
This monolithic integrated circuit is an adjustable 3-terminal
positive voltage regulator designed to supply more than 1.5A
of load current with an output voltage adjustable over a
1.2V to 37V. It employs internal current limiting, thermal
shut-down and safe area compensation.
TO-220 (Single Gauge)
1. Adj 2. Output 3. Input
+
-
Protection
Voltage
Circuitry
Reference
1
Adj
Vadj
www.fairchildsemi.com
Output
1
Rlimit
2
Vo
Output
Rev. 1.0.6

LM317 Summary of contents

  • Page 1

    ... LM317 3-Terminal Positive Adjustable Regulator Features • Output Current In Excess of 1.5A • Output Adjustable Between 1.2V and 37V • Internal Thermal Overload Protection • Internal Short Circuit Current Limiting • Output Transistor Safe Operating Area Compensation • TO-220 Package Internal Block Diagram Vin ...

  • Page 2

    ... LM317 Absolute Maximum Ratings Parameter Input-Output Voltage Differential Lead Temperature Power Dissipation Operating Junction Temperature Range Storage Temperature Range Temperature Coefficient of Output Voltage Note 1: Absolute Maximum Ratings: are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these limits. The parametric values defined in the Electrical Characteristics tables are not guaranteed at the absolute maximum ratings. The " ...

  • Page 3

    ... Typical Performance Characteristics TEMPERATURE (°C) Figure 1. Load Regulation TEMPERATURE (°C) Figure 3. Dropout Voltage TEMPERATURE (°C) Figure 2. Adjustment Current TEMPERATURE (°C) Figure 4. Reference Voltage LM317 3 ...

  • Page 4

    ... C is not needed for stability, however, it does improve transient response. o Since I is controlled to less than 100μA, the error associated with this term is negligible in most applications. ADJ 4 LM317 V KA317 Input Vadj R ...

  • Page 5

    ... Mechanical Dimensions Package TO-220 [ SINGLE GAUGE ] Dimensions in millimeters LM317 5 ...

  • Page 6

    ... LM317 Ordering Information Product Number LM317T DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS ...