s-8551 Seiko Instruments Inc., s-8551 Datasheet - Page 4

• Manufacturer Part Number: s-8551
• Description: Step-down, Built-in Fet, Synchronous Rectification, Pwm Control Switching Regulators
• Manufacturer: Seiko Instruments Inc.

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