S-8550 Datasheet, PDF (4/26 Pages) Seiko Instruments Inc – STEP-DOWN, BUILT-IN FET, SYNCHRONOUS RECIFICATION, PWM CONTROL SWITCHING REGULATORS

STEP-DOWN, BUILT-IN FET, SYNCHRONOUS RECTIFICATION, PWM CONTROL SWITCHING REGULATORS
S-8550/8551 Series
Rev.2.1_01
„ Pin Configurations
SOT-23-5
Top view
5
4
12 3
Figure 2
Table 1 S-8550 Series (Pin Configuration 1)
Pin No.
Symbol
Description
1
VIN
IC power supply pin
2
VSS
GND pin
Shutdown pin
3
ON/OFF “H” : Power on (normal operation)
“L” : Power off (standby)
4
FB
Output voltage feedback pin
5
CONT
External inductor connection pin
Table 2 S-8551 Series (Pin Configuration 2)
Pin No.
Symbol
Description
Shutdown pin
1
ON/OFF “H” : Power on (normal operation)
“L” : Power off (standby)
2
VSS
GND pin
3
CONT
External inductor connection pin
4
VIN
IC power supply pin
5
FB
Output voltage feedback pin
4
Seiko Instruments Inc.