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TL497ACNSR Datasheet(PDF) 8 Page - Texas Instruments

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Part No. TL497ACNSR
Description  500-mA PEAK STEP-UP STEP-DOWN,INVERTING SWITCHING VOLTAGE REGULATOR
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
Logo TI - Texas Instruments

TL497ACNSR Datasheet(HTML) 8 Page - Texas Instruments

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TL497A
500mA PEAK STEPUP, STEPDOWN, INVERTING SWITCHING VOLTAGE REGULATOR
SLVS009F − JUNE 1976 − REVISED FEBRUARY 2005
8
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
3-Term
Reg < 12 V
Switching
Circuit
Control
14
13
TL497A
5
VO
VI
VI
VO
R2
1 k
R1
Q2
10 mA
RCL
Vreg
14
13
5
TL497A
CURRENT LIMIT FOR EXTENDED INPUT CONFIGURATION
Q1
R
CL +
V
BE(Q1)
I
limit (PK)
R1
)
V
I
I
B(Q2)
R2
+ Vreg * 1 10 kW
Control
DESIGN EQUATIONS
Switching
Circuit
EXTENDED INPUT CONFIGURATION WITHOUT CURRENT LIMIT
3-Term
Reg < 12 V
Figure 4. Extended Input Voltage Range (VI > 12 V)


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