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S8355 Datasheet(PDF) 32 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) 32 Page - Seiko Instruments Inc

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STEP-UP, SUPER-SMALL PACKAGE, 600 kHz, PWM CONTROL or PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
S-8355/56/57/58 Series
Rev.8.1_01
32
Standard Circuits
（
1） S-8357BxxMA, S-8357BxxUA, S-8358BxxMA, S-8358BxxUA
VOUT
EXT
VSS
PWM control circuit or
PWM / PFM switching
control circuit
Phase
compensating
circuit
Oscillation
circuit
Soft start built-in
reference power
supply
+
−
VIN
1 K
Ω
2200 pF
CIN
SD
CL
+
−
+
−
IC
internal
power
supply
Remark
The power supply for the IC chip is from the VOUT pin.
Figure 19
（
2） S-8357BxxMC, S-8357FxxMC, S-8357HxxMC, S-8357NxxMC, S-8358BxxMC, S-8358FxxMC,
S-8358HxxMC, S-8358NxxMC
VOUT
VIN
L
2200 pF
CIN
SD
CL
+
−
+
−
VSS
+
−
OFF
/
ON
EXT
Oscillation
circuit
PWM control circuit or
PWM / PFM switching
control circuit
Soft start built-in
reference power
supply
IC
internal
power
supply
Phase
compensating
circuit
1 K
Ω
Remark
The power supply for the IC chip is from the VOUT pin.
Figure 20
（
3） S-8357ExxMC, S-8357GxxMC, S-8357JxxMC, S-8357PxxMC, S-8358ExxMC, S-8358GxxMC,
S-8358JxxMC, S-8358PxxMC
VOUT
EXT
VSS
VIN
L
2200 pF
CIN
SD
+
−
Oscillation
circuit
PWM control circuit or
PWM / PFM switching
control circuit
Soft start built-in
reference power
supply
VDD
+
−
Phase
compensating
circuit
CC
CL
+
−
RA
RB
IC
internal
power
supply
1 K
Ω
Remark
The power supply for the IC chip is from the VDD pin.
Figure 21



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