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Спецификация LM317F3 изготовлена «CYStech Electronics» и имеет функцию, называемую «Three Terminal Adjustable Output Positive Voltage Regulators». |
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Детали детали
Номер произв | LM317F3 |
Описание | Three Terminal Adjustable Output Positive Voltage Regulators |
Производители | CYStech Electronics |
логотип |
11 Pages
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CYStech Electronics Corp.
Three Terminal Adjustable Output
Positive Voltage Regulators
LM317F3
Spec. No. : C513F3
Issued Date : 2003.05.24
Revised Date :2010.07.22
Page No. : 1/11
The LM317F3 is an adjustable 3–terminal positive voltage regulator capable
of supplying in excess of 1.5 A over an output voltage range of 1.2 V to 37 V.
This voltage regulator is exceptionally easy to use and requires only two ex-
ternal resistors to set the output voltage. Further, it employs internal current
limiting, thermal shutdown and safe area compensation, making it essentially
TO-263
blow–out proof.
The LM317F3 serves a wide variety of applications including local, on-card
regulation. This device can also be used to make a programmable output regulator, or by connecting a fixed
resistor between the adjustment and output, the LM317F3 can be used as a precision current regulator.
● Output Current in Excess of 1.5 A
● Output Adjustable between 1.2 V and 37 V
● Internal Thermal Overload Protection
● Internal Short Circuit Current Limiting Constant with Temperature
● Output Transistor Safe–Area Compensation
● Floating Operation for High Voltage Applications
● Eliminates Stocking many Fixed Voltages
Standard Application
Vin PLLM313717
IAdj
+
Cin
0.1μF
R2
Vout
R1
+
Cout
1.0μF
*Cin is required if regulator is located an appreciate
distance from power supply filter.
**Cout is not needed for stability, however, it does
improve transient response.
Vout=1.25(1+R2/R1)+IAdjR2
Since IAdj is controlled to less than 100 μA, the
error associated with this term is negligible in
most applications.
Maximum Ratings
Rating
Input-Output Voltage Differential
Power Dissipation
TA=25℃
Thermal Resistance, Junction-to-Ambient
Thermal Resistance, Junction-to-Case
Operating Junction Temperature Range
Storage Temperature Range
LM317F3
Symbol
VI-VO
Value
40
Unit
V
PD
θJA
θJC
TOPR
Tstg
Internally Limited
60
3.0
0 to +125
-65 to +150
W
℃/W
℃/W
℃
℃
CYStek Product Specification
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CYStech Electronics Corp.
Spec. No. : C513F3
Issued Date : 2003.05.24
Revised Date :2010.07.22
Page No. : 2/11
Electrical Characteristics(VI-VO=5V,IO=0.5A,TJ=0 to 125℃, unless otherwise noted)
Characteristics
Symbol Conditions
Line Regulation(Note 1)
ΔVO(line)
TA=25℃,3.0V≤VI-VO≤40V
TA=0~125℃,3.0V≤VI-VO≤40V
Load Regulation(Note 1)
ΔVO(load) TA=25℃
VO≤6V
Adjust Pin Current
IAdj
Adjust Pin Current Change ΔIAdj
Reference Voltage
Vref
Temperature Stability
Ts
10mA≤IO≤IMAX
10mA≤IO≤IMAX
VO≥5V
VO≤5V
VO≥6V
2.5V≤VI-VO≤40V, 10mA≤IO≤IMAX
PD≤20W
3.0V≤VI-VO≤40V, 10mA≤IO≤IMAX
PD≤20W
0≤TJ≤125℃
Minimum Load Current to ILmin
maintain Regulation
Maximum Output Current Imax
VI-VO=40V
VI-VO≤15V, PD≤20W
VI-VO≤15V, PD≤20W, TA=25℃
RMS Noise vs % of VOUT eN
Ripple Rejection(Note 2)
RR
Long-Term Stability(Note 3) ST
TA=25℃, 10Hz≤f≤10kHz
VO=10V, f=120Hz
VO=10V, f=120Hz, CAdj=10μF
TA=25℃ , 1000Hrs
Min Typ Max
- 0.01 0.04
- 0.02 0.07
- 18 25
- 0.4 0.5
- 40 70
- 0.8 1.5
- 46 100
- 0.2 5.0
1.2 1.25 1.3
- 0.7 -
- 3.5 10
1. 5 2.2 -
0.15 0.4 -
- 0.003 0.01
- 60 -
66 75
-
- 0.3 1.0
Unit
%/V
mV
%/VO
mV
%/VO
μA
μA
V
%/VO
mA
A
%/VO
dB
%
Notes:1.Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
2.CAdj, when used, is connected between the adjustment pin and ground.
3.Since long-term stability cannot be measured on each device before shipment, this specification is an engineering
estimate of average stability from lot to lot.
4.Power dissipation within an IC voltage regulator produces a temperature gradient on the die, affecting individual IC
components on the die. These effects can be minimized by proper integrated circuit design and layout techniques.
Thermal regulation is the effect of these temperature gradients on the output voltage and is expressed in percentage
of output change per watt of power change in a specified time.
LM317F3
CYStek Product Specification
No Preview Available ! |
CYStech Electronics Corp.
Ordering Information
Device
LM317F3
Package
TO-263
(Pb-free)
Shipping
1000 pcs / Tape & Reel
Spec. No. : C513F3
Issued Date : 2003.05.24
Revised Date :2010.07.22
Page No. : 3/11
Marking
LM317
Characteristic Curves
Reference Voltage vs Temperature
1.26
1.255
1.25
1.245
1.24
1.235
-50 -25
0 25 50 75
Temperature(℃)
100 125
Dropout Voltage vs Input-Output Voltage Difference
3
△Vo=100mA
IL=1.5A
2.5
IL=1A
2
1.5
1
0
IL=500mA
IL=200mA
IL=20mA
25 50 75 100
Temperature(℃)
125
Adjustment Current vs Temperature
60
55
50
45
40
35
-50
-25
0 25 50 75 100 125
Temperature(℃)
LM317F3
CYStek Product Specification
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Номер в каталоге | Описание | Производители |
LM317F3 | Three Terminal Adjustable Output Positive Voltage Regulators | CYStech Electronics |
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