S-8533 Datasheet, PDF (2/31 Pages) Seiko Instruments Inc – STEP-DOWN, SYNCHRONOUS PWM CONTROL SWITCHING REGULATOR CONTROLLER

STEP-DOWN, SYNCHRONOUS PWM CONTROL SWITCHING REGULATOR CONTROLLER
S-8533 Series
Rev.2.3_00
„ Block Diagram
Tr
VIN
L
Oscillation
circuit
+
V_IN C_IN
PDRV
NDRV
Tr
C_SS
CSS
PWM control circuit
P.N feed-through
−
prevention circuit
+
Reference voltage
source with soft start
Remark All the diodes in the figure are parasitic diodes.
Figure 1
ON / OFF
VOUT
+
COUT
VSS
2
Seiko Instruments Inc.