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LM317T KA317

LM317T (KA317) Adjustable Voltage Regulator (Positive)

LM317T (KA317)
LM317T (KA317) Adjustable Voltage Regulator (Positive)
3-TERMINAL POSITIVE ADJUSTABLE REGULATOR
This monolithic integrated circuit is an adjustable 3-terminal positive voltage regulator designed to supply 2.2A typical of load current with an output voltage adjustable over a 1.2 to 37V. It employs internal current limiting, thermal shutdown and safe area compensation.
TO-220
FEATURES
· · · · · · Output Current 2.2A Typical Output Adjustable Between 1. 2V and 37V Internal Thermal-Overload Protection Internal Short-Circuit Current-Limiting Output Transistor Sate-Area Compensation TO-220 Package
ORDERING INFORMATION
Device LM317T (KA317) Package TO-220 Operating Temperature 0°C ~ +125°C
BLOCK DIAGRAM
Voltage Reference
Production Circuitry Rlimit 2 Vo
1 Vadj
Rev. B, May 2000
LM317T (KA317)
ELECTRICAL CHARACTERISTICS
Adjustable Pin Current Adjustable Pin Current Change
IADJ IADJ
Reference Voltage
STt L(MIN) IO(MAX) eN RR
ST RJC
Rev. B, May 2000
LM317T (KA317)
TYPICAL PERFORMANCE CHARACTERISTICS
Fig. 1 Load Regulation
Fig. 2 Adjustment Current
55 Adjustment Current (µA) 125
-0.4 -0.6 -0.8 -1.0 0 25 50 75 100 TEMPERATURE (°C)
TEMPERATURE (°C)
Fig. 3 Dropout Voltage
INPU-OUTPUT VOLTAGE DIFFERENTIAL (V) 3
Fig. 4 Reference Voltage
1.26 REFERENCE VOLTAGE (V) 125 1.255 1.25 1.245 1.24 1.235 -50 -25
1 0 25 50 75 100 TEMPERATURE (°C)
TEMPERATURE (°C)
Rev. B, May 2000
LM317T (KA317)
Typical Application
KA317 Vadj
Ci 0.1µF
Iadj R2 adj
Co 0.1µF
Fig. 5 Programmable Regulator Ci is required when regulator is located at an appreciable distance from the power supply filter. Co improves transient response by reducing AC noise which is present at the output. Since I ADJ is controlled to less than 100µA, the error associated with this term is negligible in most applications.
Rev. B, May 2000
LM317T (KA317)
TO-220 Package Dimensions
TO-220 (FS PKG CODE AE)
18.95MAX.
Dimensions in Millimeters
August 1999, Rev B
Rev. B, May 2000
TRADEMARKS
The following are registered and unregistered trademarks Fairchild Semiconductor owns or is authorized to use and is not intended to be an exhaustive list of all such trademarks.
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DISCLAIMER
HiSeC ISOPLANAR MICROWIRE POP PowerTrench® QFET QS Quiet Series SuperSOTTM-3 SuperSOTTM-6
SuperSOTTM-8 SyncFET TinyLogic UHC VCXTM
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.
LIFE SUPPORT POLICY
PRODUCT STATUS DEFINITIONS Definition of Terms
Datasheet Identification Advance Information Product Status Formative or In Design First Production Definition This datasheet contains the design specifications for product development. Specifications may change in any manner without notice. This datasheet contains preliminary data, and supplementary data will be published at a later date. Fairchild Semiconductor reserves the right to make changes at any time without notice in order to improve design. This datasheet contains final specifications. Fairchild Semiconductor reserves the right to make changes at any time without notice in order to improve design. This datasheet contains specifications on a product that has been discontinued by Fairchild semiconductor. The datasheet is printed for reference information only.
Preliminary
No Identification Needed
Full Production
Obsolete
Not In Production
Rev. E