http://www.datasheet4u.com

900,000+ Datasheet PDF Search and Download

Datasheet4U offers most rated semiconductors datasheets pdf


Fairchild Semiconductor
Fairchild Semiconductor

LM317T Datasheet

Adjustable Voltage Regulator (Positive)


LM317T Datasheet Preview


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 shut-
down 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
Package Operating Temperature
LM317T (KA317) TO-220
0°C ~ +125°C
BLOCK DIAGRAM
Vin 3
Voltage
Reference
+
-
1
Vadj
©2000 Fairchild Semiconductor International
Production
Circuitry
Rlimit
2 Vo
Rev. B, May 2000
Page 1

ABSOLUTE MAXIMUM RATINGS (TA= +25°C, unless otherwise specied)
Characteristic
Symbol
Value
Input-Output Voltage Differential
Lead Temperature
Power Dissipation
Operating Temperature Range
Storage Temperature Range
Temperature Coefcient of Output Voltage
VI - VO
TLEAD
PD
TOPR
TSTG
VO/T
40
230
Internally limited
0 ~ +125
-65 ~ +125
0.02
Unit
V
°C
W
°C
°C
%/°C
ELECTRICAL CHARACTERISTICS
(VI - VO = 5V, IO = 0.5A, 0°C TJ +125°C, IMAX = 1.5A, PMAX = 20W, unless otherwise specified)
Characteristic
Symbol
Test Conditions
Min Typ
Line Regulation
Load Regulation
Adjustable Pin Current
Adjustable Pin Current Change
Reference Voltage
Temperature Stability
Minimum Load Current to
Maintain Regulation
Rline
Rload
IADJ
IADJ
VREF
STt
L(MIN)
TA = +25°C
3V VI - VO 40V
3V VI - VO 40V
TA = +25°C, 10mA IO IMAX
VO < 5V
VO 5V
10mA IO IMAX
VO < 5V
VO 5V
3V VI - VO 40V
10mA IO IMAX
P PMAX
3V VIN - VOUT 40V
10mA IO IMAX
PD PMAX
VI - VO = 40V
0.01
0.02
18
0.4
40
0.8
46
2.0
1.20 1.25
0.7
3.5
Maximum Output Current
RMS Noise, % of VOUT
Ripple Rejection
Long-Term Stability, TJ = THIGH
IO(MAX)
eN
RR
ST
VI - VO 15V, PD PMAX
VI - VO 40V, PD PMAX, TA = 25°C
TA= +25°C, 10Hz f 10KHz
VO = 10V, f = 120Hz
without CADJ
CADJ = 10µF
TA = +25°C for end point
measurements, 1000HR
1.0 2.2
0.3
0.003
60
66 75
0.3
Thermal Resistance Junction to
Case
RθJC
5
Max
0.04
0.07
25
0.5
70
1.5
100
5
1.30
12
0.01
1
Unit
%/V
%/V
mV
%/VO
mV
%/VO
µA
µA
V
%/VO
mA
A
%/VO
dB
%
°C/W
* Load and line regulation are specified at constant junction temperature. Change in VD due to heating effects must be taken into account separately. Pulse testing
with low duty is used. (PMAX = 20W)
©2000 Fairchild Semiconductor International
Rev. B, May 2000
Page 2

TYPICAL PERFORMANCE CHARACTERISTICS
Fig. 1 Load Regulation
0.2
0 IL = 0.5A
-0.2
IL = 1.5A
-0.4
-0.6
-0.8
-1.0
0
25 50 75 100
TEMPERATURE (°C)
125
Fig. 2 Adjustment Current
55
50
45
40
35
-50 -25
0 25 50 75 100 125
TEMPERATURE (°C)
Fig. 3 Dropout Voltage
3
Vo = 100mV
2.5
IL = 1.5A
IL = 1A
2
IL = 500mA
IL = 200mA
1.5
IL = 20mA
1
0 25 50 75 100 125
TEMPERATURE (°C)
Fig. 4 Reference Voltage
1.26
1.255
1.25
1.245
1.24
1.235
-50 -25
0 25 50 75 100 125
TEMPERATURE (°C)
©2000 Fairchild Semiconductor International
Rev. B, May 2000
Page 3
Part Number LM317T
Manufactur Fairchild Semiconductor
Description Adjustable Voltage Regulator (Positive)
Total Page 6 Pages
PDF Download
LM317T datasheet
Download PDF File
LM317T datasheet
View Html for PC & Mobile


Related Datasheet

LM317 , LM317 , LM317 , LM317 , LM317 , LM317 , LM317 , LM317 , LM317 , LM317 , LM317 , LM317 , LM317 , LM317-TI , LM317A , LM317AEMP , LM317AH , LM317AT , LM317BD2T , LM317BT , LM317D2T , LM317D2T , LM317DCY , LM317DT , LM317E3 , LM317E3 , LM317EMP , LM317F3 , LM317H , LM317HV , LM317HVH , LM317HVK STEEL , LM317HVT , LM317J3 , LM317K , LM317K , LM317K STEEL , LM317KC , LM317KTER , LM317L , LM317L , LM317L , LM317L , LM317L , LM317L , LM317L , LM317LBD , LM317LBD , LM317LBZ , LM317LBZ , LM317LC , LM317LD , LM317LD , LM317LD , LM317LI , LM317LIBP , LM317LIBPX , LM317LM , LM317LZ , LM317LZ , LM317LZ , LM317LZ , LM317M , LM317M , LM317M , LM317M , LM317M , LM317M , LM317M , LM317MDT , LM317MDT , LM317MKTP , LM317MS , LM317MT , LM317MX , LM317P , LM317S , LM317T , LM317T , LM317T , LM317T , LM317T , LM317T (KA317) ,

site map

webmaste! click here

contact us

Buy Components