S-8327 Seiko, S-8327 Datasheet - Page 19

• Manufacturer Part Number: S-8327
• Description: (S-8323 / S-8327) SMALL PACKAGE PWM CONTROL STEP-UP SWITCHING REGULATOR
• Manufacturer: Seiko

SMALL PACKAGE PWM CONTROL STEP-UP SWITCHING REGULATOR
S-8323/8327 Series
18
(4) S-8327BXXMA
(5) S-8323DXXMC (Output voltage adjustment circuit with external resistors)
(6) S-8327EXXMC (Output voltage adjustment circuit with external resistors)
S-8327BXXUA
V
IN
V
+
-
C
IN
IN
L
+
-
C
V
IN
L
2200pF
IN
1K
+
-
C
L
CONT
IN
EXT
2200pF
1K
Soft start circuit
PWM
control
circuit
Soft start circuit
EXT
PWM
control
circuit
Figure 14
Soft start circuit
SD
Figure 15
SD
Seiko Instruments Inc.
PWM
control
circuit
Figure 13
+
-
VREF
V
DD
+
-
VREF
V
SD
DD
R
R
2
1
+
-
VREF
R
R
V
2
1
V
OUT
SS
V
C
V
V
OUT
OUT
SS
C
C
C
R
R
A
B
V
R
R
SS
A
B
+
-
C
OUT
+
-
C
+
-
OUT
C
OUT
Note:
The power supply for
IC chip is supplied
from V
Note:
The power supply for
IC chip is supplied
from Vout pin.
Note:
The power supply for
IC chip is supplied
from V
DD
V
OUT
V
V
pin.
DD
CC
CC
pin.