s-8460 Seiko Instruments Inc., s-8460 Datasheet - Page 2

• Manufacturer Part Number: s-8460
• Description: Step-up Or Down, Single-coil, Pwm Control Switching Regulator Controller
• Manufacturer: Seiko Instruments Inc.

Remark Diodes shown in the IC are parasitic diodes.
2
STEP-UP OR DOWN, SINGLE-COIL, PWM CONTROL SWITCHING REGULATOR CONTROLLER
S-8460
Block Diagram
Product Code
• Product code :
• Delivery form :
V
IN
C
IN
SW1
SW2
C
S-8460B00AFT-TB-G
Taping only
BST
SD2
C
VL
BST
EXT1
LX
EXT2
VL
ON / OFF
T
Seiko Instruments Inc.
VSS DVSS
VIN
Figure 1
PWM automatic-
L
selection circuit
Voltage
Oscillation
source
S-8460
protection
Overload
circuit
CPRO
C
PRO
Reference voltage
with soft-start
CSS
C
SS
+
−
EXT3
FB
SW3
SD1
R
R
FB2
FB1
Rev.2.1
C
fzfb
C
OUT
_00