RT9178
Typical Application Circuit
VIN CIN
1uF
Chip Enable
RT9178
VIN VOUT
GND
EN
BP
COUT VOUT
2.2uF
CBP
10nF
Functional Pin Description
Pin No.
Pin Name
SOT-23-5 SOT-23-5 (R-Type)
Pin Function
1
3
VIN
Power Input Voltage
5
1
VOUT
Output Voltage
2
2
GN D
Ground
Enable Input Logic, Active Low. If the Shutdown Feature is not
3
4
EN
Required, Connect EN to VIN.
4
5
BP
Reference Noise Bypass
Function Block Diagram
EN
Shutdown
Quick
and
Start
Logic Control
BP
VREF
+
Error
Amplifier
MOS Driver
Current-Limit
and
Thermal
Protection
VIN
VOUT
GND
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DS9178-16 April 2008