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LM317LBD Fiches technique(PDF) 4 Page - ON Semiconductor

No de pièce LM317LBD
Description  LOW CURRENT THREE-TERMINAL ADJUSTABLE POSITIVE VOLTAGE REGULATOR
Download  12 Pages
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Fabricant  ONSEMI [ON Semiconductor]
Site Internet  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

LM317LBD Fiches technique(HTML) 4 Page - ON Semiconductor

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LM317L
4
MOTOROLA ANALOG IC DEVICE DATA
* Pulse Testing Required:
1% Duty Cycle is suggested.
Load Regulation (mV) = VO (min Load) –VO (max Load)
Load Regulation (% VO) =
VO (min Load) – VO (max Load)
X
100
VO (min Load)
VO (max Load)
LM317L
Cin
0.1
µF
Adjust
R2
1%
CO
1.0
µF
+
*
RL
(max Load)
RL
(min Load)
Vout
R1
240
1%
Vin*Vin
IAdj
IL
Figure 2. Load Regulation and
∆IAdj/Load Test Circuit
VO (min Load)
Pulse Testing Required:
1% Duty Cycle is suggested.
LM317L
Vin
Vout
Adjust
R1
240
1%
+
1
µF
CO
RL
Cin
R2
1%
To Calculate R2:
Vout = ISET R2 + 1.250 V
Assume ISET = 5.25 mA
IL
IAdj
ISET
Vref
VO
VI
0.1
µF
Figure 3. Standard Test Circuit
LM317L
Vin
Vout
Vout = 1.25 V
RL
Cin
0.1
µF
Adjust
R1
240
1%
D1 *
1N4002
CO
+
1
µF
14.30V
4.30V
R2
1.65K
1%
**
10
µF
+
*D1 Discharges CAdj if Output is Shorted to Ground.
f = 120 Hz
VO
**CAdj provides an AC ground to the adjust pin.
Figure 4. Ripple Rejection Test Circuit


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