S-8353 Seiko Instruments, S-8353 Datasheet - Page 2

• Manufacturer Part Number: S-8353
• Description: (S-8353 / S-8354) PWM Control Switchable Built-in Transistor Switching Regulator
• Manufacturer: Seiko Instruments

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STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR
S-8353/8354 Series
Block Diagrams
(1) A, C and H Types (Without Shutdown Function)
(2) A and H Types (With Shutdown Function)
(3) D and J Types (V
DD
/ V
OUT
Separate Type)
CONT
CONT
CONT
Soft start built-in
reference power
supply
Soft start built-in
reference power
supply
Soft start built-in
reference power
supply
ON
PWMcontrol circuit
or PWM / PFM
swiching control
circuit
PWMcontrol circuit
or PWM / PFM
swiching control
circuit
PWMcontrol circuit
or PWM / PFM
swiching control
circuit
Oscillation circuit
Seiko Instruments Inc.
Oscillation circuit
Oscillation circuit
/
OFF
Figure 1
Figure 2
Figure 3
Phase
compensation
circuit
Phase
compensation
circuit
Phase
compensation
circuit
IC internal
power supply
IC internal
power supply
IC internal
power supply
VDD
+
−
+
−
+
−
VOUT
VOUT
VOUT
VSS
VSS
VSS
Rev.1.4
_00