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LM337M Folha de dados(PDF) 4 Page - ON Semiconductor

Nome de Peças LM337M
Descrição Electrónicos  MEDIUM CURRENT THREE-TERMINAL ADJUSTABLE NEGATIVE VOLTAGE REGULATOR
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Fabricante Electrônico  ONSEMI [ON Semiconductor]
Página de início  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

LM337M Folha de dados(HTML) 4 Page - ON Semiconductor

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LM337M
4
MOTOROLA ANALOG IC DEVICE DATA
Figure 2. Load Regulation and
∆IAdj/Load Test Circuit
Figure 3. Standard Test Circuit
Figure 4. Ripple Rejection Test Circuit
Cin
1.0
µF
R2
1%
R1
120
1%
CO +
RL
(max
Load)
–VO (min Load)
VO (max Load)
Adjust
Vin
–Vin
Vout
* Pulse Testing required:
1% Duty Cycle is suggested.
Load Regulation (mV) = VO (min Load) – VO (max Load)
Load Regulation (%/VO) =
x 100
*
IL
IAdj
1.0
µF
VO (min Load) – VO(max Load)
VO
RL
+
1.0
µF
CO
R1
120
1%
R2
Cin
Adjust
Vin
LM337M
To Calculate R2:
R2 =
– 1
R1
This assumes IAdj is negligible.
Pulse Testing Required: 1% Duty Cycle is suggested.
VI
IAdj
Vref
IL
VO
1.0
µF
Vout
RL
+
1.0
µF
CO
1N4002
D1 *
Cin
1%
R2
Adjust
Vin
LM337M
R1
120
14.3V
4.3V
f = 120 Hz
CAdj
+
Vout = –1.25 V
*D1 Discharges CAdj if Output is shorted to Ground.
1.0
µF
10
µF
Vout
VO
LM33M
VO (min Load)
Vref


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