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L99VR01 Folha de dados(PDF) 15 Page - STMicroelectronics

Nome de Peças L99VR01
Descrição Electrónicos  Automotive low dropout linear voltage regulator with configurable output voltage having 200 mA current capability
PDF  40 Pages
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L99VR01 Folha de dados(HTML) 15 Page - STMicroelectronics

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Application information
Figure 27. Application schematic
Vs
EN
Ishort
RST
SEL1
T2
GND
Rsh
Vo
TW
Vbat
C 1
C 2
Co
RRST
T1
SEL3
SEL2
Figure 28. Application schematic – Post regulation
GND
Rsh
Vo
V in
C 1
C 2
Co
DC/DC
CONVERTER
OR
PRE-REGULATOR
Vbat
Vs
EN
Ishort
T1
T2
TW
R ST
SEL1
RRST
SEL2
SEL3
Input ceramic capacitor C2 ≥ 4.7 μF is necessary for the regulator to operate properly. The other input capacitor
C1 can be used as backup supply for the application. The C0 capacitor, connected to the output pin, is for
bypassing to GND the high-frequency noise and it guarantees stability even during sudden line and load
variations.
Suggested value is C0 = 3.3 µF.
The ESR of the SMD output ceramic capacitor has a negligible effect on the stability of the L99VR01 family for
capacitors with low ESR. A ceramic SMD capacitor is recommended on Vo pin.
L99VR01
Application information
DS13649 - Rev 4
page 15/40



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