Description
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 VIN VSS
Pin No.1 2 3 4 5
Symbol
ON/OFF FB CONT
1
2
3
Figure 2
Table 2
Pin No.1 2 3 4 5
S-8551 Series (Pin Configuration 2)
Description Shutdown pin “H” : Power on (normal operation) “L” : Power off (standby) VSS GND pin External inductor connection pin IC power supply pin Output voltage feedback pin
Symbol ON/OFF
CONT VIN F
Features
- s.
- Oscillation frequency : 1.2 MHz.
- Input voltage range : 2.0 to 5.5 V.
- Output voltage range : Arbitrarily settable by external output voltage setting resistor.
- Output current : 600 mA.
- Reference voltage : 0.6 V ±2.0%.
- Efficiency : 92%.
- Soft-start function : 1 ms typ.
- Shutdown function : Shutdown current consumption : 1.0 µA max.
- Built-in current limit circuit.
- Pch power MOS FET on-resistance : 0.4 Ω typ.