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PDF LM317LA3 Data sheet ( Hoja de datos )

Número de pieza LM317LA3
Descripción Three Terminal Adjustable Output Positive Voltage Regulators
Fabricantes CYStech Electronics 
Logotipo CYStech Electronics Logotipo



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No Preview Available ! LM317LA3 Hoja de datos, Descripción, Manual

CYStech Electronics Corp.
Spec. No. : C148A3
Issued Date : 2014.03.21
Revised Date :
Page No. : 1/12
Three Terminal Adjustable Output Positive Voltage Regulators
LM317LA3
The LM317LA3 is an adjustable 3–terminal positive voltage regulator capable of supplying in excess of
100mA over an output voltage range of 1.2 V to 37 V. This voltage regulator is exceptionally easy to use
and requires only two external resistors to set the output voltage. Further, it employs internal current
limiting, thermal shutdown and safe area compensation, making it essentially blow–out proof.
The LM317LA3 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 LM317LA3 can be used as a precision current regulator.
Output Current in Excess of 100m 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
Pb-free lead plating and halogen-free package.
TO-92
AOI
Ordering Information
Device
LM317LA3-0-TB-G
LM317LA3-0-BK-G
Package
TO-92
(Pb-free lead plating and halogen-free package)
TO-92
(Pb-free lead plating and halogen-free package)
Shipping
2000 pcs / Tape & Box
1000 pcs/ bag, 10 bags/box,
10boxes/carton
Environment friendly grade : S for RoHS compliant products, G for RoHS compliant and
green compound products
Packing spec, TB :2000 pcs/tape & box; BK: 1000 pcs / bag, 10 bags/box, 10 boxes/carton
Product rank, zero for no rank products
Product name
LM317LA3
CYStek Product Specification

1 page




LM317LA3 pdf
CYStech Electronics Corp.
Spec. No. : C148A3
Issued Date : 2014.03.21
Revised Date :
Page No. : 5/12
Load Regulation(mV)=Vo(min load)-Vo(max load)
Vo(min load)-Vo(max load)
Load Regulation(%Vo)=
×100
Vo(min load)
Fig 2. Load Regulation and IAdj/Load test circuit
Pulse testing required.
1% Duty Cycle is suggested.
To calculate R2: Vout=ISETR2+1.250V
Assume ISET=5.25mA
Fig 3. Standard Test Circuit
LM317LA3
CYStek Product Specification

5 Page





LM317LA3 arduino
CYStech Electronics Corp.
Spec. No. : C148A3
Issued Date : 2014.03.21
Revised Date :
Page No. : 11/12
Recommended wave soldering condition
Product
Peak Temperature
Pb-free devices
260 +0/-5 °C
Soldering Time
5 +1/-1 seconds
Recommended temperature profile for IR reflow
Profile feature
Sn-Pb eutectic Assembly
Pb-free Assembly
Average ramp-up rate
(Tsmax to Tp)
3°C/second max.
3°C/second max.
Preheat
Temperature Min(TS min)
Temperature Max(TS max)
Time(ts min to ts max)
100°C
150°C
60-120 seconds
150°C
200°C
60-180 seconds
Time maintained above:
Temperature (TL)
Time (tL)
183°C
60-150 seconds
217°C
60-150 seconds
Peak Temperature(TP)
240 +0/-5 °C
260 +0/-5 °C
Time within 5°C of actual peak
temperature(tp)
10-30 seconds
20-40 seconds
Ramp down rate
6°C/second max.
6°C/second max.
Time 25 °C to peak temperature
6 minutes max.
8 minutes max.
Note : All temperatures refer to topside of the package, measured on the package body surface.
LM317LA3
CYStek Product Specification

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