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1
S-8520X15MC-LYA (MAIN ASSY : IC402)
• PWM Control Step-down Switching Regulator-controller
A
Pin Arrangement (topview)
B
C
Pin Function
No.
Pin Name
1
ON/OFF
2
VSS
3
VOUT
4
EXT
5
VIN
D
E
F
88
1
2
Block Diagram
VIN 5
EXT
Power off pin
H = Normal operation (Step-down operation)
L = Step-down operation stopped (All circuits deactived)
Ground pin
Output voltage monitoring pin
Connection pin for external trasistor
IC power supply pin
DVD-R7783
2
3
Oscillation
Circuit
PWM Control
4
Circuit
1
ON/OFF
Pin Function
3
4
Reference Voltage
Source with Soft Start
3
VOUT
V
ON / OFF
2
VSS
4
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