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S-8520A29MC-AVOT2G Datasheet(PDF) 3 Page - Seiko Instruments Inc

Part # S-8520A29MC-AVOT2G
Description  SWITCHING REGULATOR CONTROLLER
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Manufacturer  SII [Seiko Instruments Inc]
Direct Link  http://www.sii.co.jp
Logo SII - Seiko Instruments Inc

S-8520A29MC-AVOT2G Datasheet(HTML) 3 Page - Seiko Instruments Inc

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STEP-DOWN, PWM CONTROL or PWM / PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.9.0_01
S-8520/8521 Series
3
Block Diagrams
1. S-8520 Series
VOUT
VSS
L
SD
COUT
VON/OFF
______
+
VIN
Tr
EXT
VIN
CIN
+
Oscillation
circuit
PWM control
circuit
Reference voltage
source with soft-start
+
ON/OFF
______
Remark All the diodes in the figure are parasitic diodes.
Figure 1
2. S-8521 Series
VOUT
VSS
L
SD
COUT
+
VIN
Tr
EXT
VIN
CIN
+
+
VON/OFF
______
ON/OFF
______
Oscillation
circuit
PWM / PFM switching
control circuit
Reference voltage
source with soft-start
Remark
All the diodes in the figure are parasitic diodes.
Figure 2


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