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S8355 Datasheet(PDF) 33 Page - Seiko Instruments Inc

Part # S8355
Description  STEP-UP, SUPER-SMALL PACKAGE, 600 kHz, PWM CONTROL or PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
PDF  72 Pages
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Manufacturer  SII [Seiko Instruments Inc]
Direct Link  http://www.sii.co.jp
Logo SII - Seiko Instruments Inc

S8355 Datasheet(HTML) 33 Page - Seiko Instruments Inc

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STEP-UP, SUPER-SMALL PACKAGE, 600 kHz, PWM CONTROL or PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.8.1_01
S-8355/56/57/58 Series
33
（
4） S-8357ExxMC, S-8357GxxMC, S-8357JxxMC, S-8358ExxMC, S-8358GxxMC, S-8358JxxMC
VOUT
EXT
VSS
VIN
L
2200 pF
CIN
SD
CL
+
−
+
−
Oscillation
circuit
PWM control circuit or
PWM / PFM switching
control circuit
Soft start built-in
reference power
supply
VDD
+
−
Phase
compensating
circuit
IC
internal
power
supply
1 K
Ω
Remark
The power supply for the IC chip is from the VDD pin.
Figure 22
（
5） S-8355KxxMC, S-8355LxxMC, S-8355MxxMC, S-8355QxxMC, S-8356KxxMC, S-8356LxxMC,
S-8356MxxMC, S-8356QxxMC
VOUT
EXT
VSS
VIN
L
2200 pF
CIN
SD
+
−
CL
+
−
VDD
CC
RA
RB
OFF
/
ON
Oscillation
circuit
PWM control circuit or
PWM / PFM switching
control circuit
+
−
Soft start built-in
reference power
supply
Phase
compensating
circuit
IC
internal
power
supply
1 K
Ω
Remark
The power supply for the IC chip is from the VDD pin.
Figure 23
（
6） S-8355KxxMC, S-8355LxxMC, S-8355MxxMC, S-8356KxxMC, S-8356LxxMC, S-8356MxxMC
VOUT
VIN
L
2200 pF
CIN
SD
CL
+
−
+
−
VSS
EXT
VDD
OFF
/
ON
Oscillation
circuit
PWM control circuit or
PWM / PFM switching
control circuit
+
−
Soft start built-in
reference power
supply
Phase
compensating
circuit
IC
internal
power
supply
1 K
Ω
Remark
The power supply for the IC chip is from the VDD pin.
Figure 24
Caution The above connection diagram and constant will not guarantee successful operation. Perform
through evaluation using the actual application to set the constant.



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