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L6983 Fiches technique(PDF) 6 Page - STMicroelectronics

No de pièce L6983
Description  38 V, 3 A synchronous step-down converter with 17 μA quiescent current
PDF  63 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L6983 Fiches technique(HTML) 6 Page - STMicroelectronics

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3
Typical application circuit
Figure 3. Basic application (adjustable version)
PGOOD
BOOT
SW
SW
VBIAS
VOUT/FB
PGND
PGND
VIN
VIN
VINLDO
EN/CLKIN
FSW
VCC
AGND
AGND
E.P.
L6983
VOUT
GND
GND
VIN
R FSW
C VCC
CBOOT
RPGOOD
L
RFBH
RFBL
COUT
CIN
CFILT
RFILT
Table 2. Typical application component
Symbol
Value
Description
CIN
10 µF
Input capacitor
RFILT
0.1 kΩ
VINLDO filter resistor
CFILT
1 µF
VINLDO filter capacitor
CVCC
1 µF
VCC bypass capacitor
CBOOT
100 nF
Bootstrap capacitor
COUT
40 µF
Output capacitor
RFBH
400 kΩ
VOUT divider upper resistor
RFBL
82 kΩ
VOUT divider lower resistor
L
4.7 µH (FSW = 1 MHz)
Output inductor
RPGOOD
1 MΩ
PGOOD resistor
RFSW
10 kΩ
FSW setting resistor
L6983
Typical application circuit
DS13116 - Rev 1
page 6/63



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