SP9718
1.5A LOW-NOISE PWM STEP-DOWN REGULATOR
TYPICAL APPLCATION CIRCUIT
PIN DESCRIPTION
& ELECTRICAL CHARACTERISTICS
Pin
1
2
3
4
5
6
7
8
Symbol
VIN
GND
SD
VREF
VFB
PGND
LX
PVIN
Description
Voltage supply for internal circuits
Ground for internal reference voltage divider
CMOS input level
V
OUT
Set Voltage
Feedback node for the V
OUT
Ground for output power transistors
Inductor connection to the Drains of the internal
power MOSFETs
Voltage supply for output power transistors
2
2.5
5.5
5.5
V
V
Shutdown level
Enable level
0.75 x VIN
0
1.1
VREF
VIN + 0.3 V
2.0
VIN
V
V
Operating Rating
Min.
Typ.
Max.
2
2.5
5.5
Unit
V
2007/12/20
Ver.1
Page 2