S-8353A20MC-IQFT2X Datasheet, PDF (22/49 Pages) Seiko Instruments Inc – BUILT-IN TRANSISTOR SWITCHING REGULATOR

STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR
S-8353/8354 Series
Rev.3.0_01
 Standard Circuits
(1) S-8353AxxMA / UA, S-8353CxxMA, S-8353HxxMA/UA, S-8354AxxMA/UA, S-8354CxxMA, S-8354HxxMA / UA
SD
CONT
L
VOUT
V_IN C_IN
+
−
Oscillation circuit
IC internal
power
PWM control circuit ^supply
or PWM / PFM
+
switching control
−
circuit
C_L
+
−
Soft start built-in
reference power
supply
Phase
compensating
circuit
VSS
Remark The power supply for the IC chip is from the VOUT pin.
Figure 13
(2) S-8353AxxMC, S-8353HxxMC, S-8354AxxMC, S-8354HxxMC
SD
L
CONT
VOUT
V_IN C_IN
+
−
Oscillation circuit
IC internal
power
supply
PWM control circuit
+
or PWM / PFM
switching control
−
circuit
C_L
+
−
Soft start built-in
reference power
supply
Phase
compensating
circuit
VSS
ON / OFF
Remark The power supply for the IC chip is from the VOUT pin.
Figure 14
22