S-8353 Seiko Instruments, S-8353 Datasheet - Page 21

• 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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Rev.1.4
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR
Standard Circuits
(1) S-8353AxxMA / UA, S-8353CxxMA, S-8353HxxMA/UA, S-8354AxxMA/UA, S-8354CxxMA, S-8354HxxMA / UA
(2) S-8353AxxMC, S-8353HxxMC, S-8354AxxMC, S-8354HxxMC
Remark The power supply for the IC chip is from the VOUT pin.
Remark The power supply for the IC chip is from the VOUT pin.
_00
V
V
IN
IN
+
−
C
+
−
C
IN
IN
L
L
ON
CONT
/
CONT
OFF
Soft start built-in
reference power
supply
Soft start built-in
reference power
supply
Seiko Instruments Inc.
PWM control circuit
or PWM / PFM
switching control
circuit
PWM control circuit
or PWM / PFM
switching control
circuit
Oscillation circuit
Oscillation circuit
SD
SD
Figure 13
Figure 14
Phase
compensating
circuit
Phase
compensating
circuit
IC internal
power
supply
IC internal
power
supply
+
−
+
−
VOUT
VOUT
VSS
VSS
S-8353/8354 Series
+
−
C
+
−
C
L
L
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