S-8533A125FT-TB-X Datasheet, PDF (8/33 Pages) Seiko Instruments Inc – SWITCHING REGULATOR CONTROLLER

STEP-DOWN, SYNCHRONOUS PWM CONTROL SWITCHING REGULATOR CONTROLLER
S-8533 Series
Rev.3.0_01
 Measurement Circuits
1.
A
0.1 μF
VIN
PDRV
A
CSS
VOUT
A
4700 pF
A _{ON/OFF VSS}
NDRV
A
2.
A
+
F93
22 μF × 3
Figure 4
0.1 μF
VIN
CSS
4700 pF
ON/OFF
VSS
PDRV
VOUT
NDRV
2200 pF
1 kΩ
2SA1213
F93
+
22 μF × 3
MA737
CD105
22 μH
++
F93 F93
47 μF 47 μF
C_NDRV
1000 pF
3.
A
+
F93
22 μF
Figure 5
0.1 μF
VIN
CSS
4700 pF
ON/OFF
VSS
PDRV
VOUT
NDRV
CPH6303
CDRH104R
22 μH
CPH6403
I_OUT
++
F93 F93
47 μF 47 μF
Figure 6
8