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BC337 View Datasheet(PDF) - Motorola => Freescale

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BC337 Datasheet PDF : 8 Pages
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LM337
Figure 2. Load Regulation and IAdj/Load Test Circuit
R2 1%
Cin 1.0 µF
IAdj
CO +
1.0 µF
R1 120
* Pulse testing required.
1% Duty Cycle is suggested.
Adjust
Vin
Vout
–VI
LM337
IL
Load Regulation (mV) = VO (min Load) – VO (max Load)
*
RL
(max
Load)
–VO (min Load)
–VO (max Load)
Load Regulation (% VO) =
VO (min Load) – VO (max Load)
VO (min Load)
x 100
Figure 3. Standard Test Circuit
R2 1%
Cin 1.0 µF
VI
IAdj
Vref
Adjust
Vin
Vout
LM337
To Calculate R2:
R2 =
VO
Vref
–1
R1
This assumes IAdj is negligible.
+
CO 1.0 µF
RL
VO
R1 120
IL
* Pulse testing required.
* 1% Duty Cycle is suggested.
14.3 V
4.3 V
Figure 4. Ripple Rejection Test Circuit
R2 1%
Cin 1.0 µF
+
CAdj 10µF
+
CO 1.0 µF
Adjust
Vin
LM337
R1 120 D1*
Vout
1N4002
RL
VO
Vout = –1.25 V
f = 120 Hz
* D1 Discharges CAdj if output is shorted to Ground.
Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding
the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and
specifically disclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters which may be provided in Motorola
data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals”
must be validated for each customer application by customer’s technical experts. Motorola does not convey any license under its patent rights nor the rights of
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applications intended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury
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Motorola was negligent regarding the design or manufacture of the part. Motorola and are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal
Opportunity/Affirmative Action Employer.
4
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