RT8004PQV 데이터 시트보기 (PDF) - Richtek Technology
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RT8004PQV Datasheet PDF : 16 Pages
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RT8004
Functional Pin Description
Pin No.
Pin
RT8004PS RT8004PCP RT8004PQP Name
Pin Function
1
1
15
VDD
Signal Input Supply. Decouple this pin to GND with a capacitor.
Normally VDD is equal to PVDD.
Power Good Indicator. Open-drain logic output that is pulled to
2
2
16
PGOOD ground when the output voltage is not within ±12.5% of regulation
point.
Error Amplifier Compensation Pin. The current comparator
3
3
1
COMP threshold increases with this control voltage. Connect external
compensation elements to this pin to stabilize the control loop.
4
4
2
FB
Feedback Pin. Receives the feedback voltage from a resistive
divider connected across the output.
5
5
3
RT
Oscillator Resistor Input. Connecting a resistor to ground from this
pin sets the switching frequency.
6
6
External Clock Synchronization Input. The internal oscillator can
4
SYNC be synchronized to an external clock applied to this pin. If not use,
please connect this pin to VDD or GND.
7
7
Enable Control and Soft-Start Input. Forcing this pin below 0.5V
5
EN/ SS
shuts down the RT8004. In shutdown all functions are disabled
drawing < 1uA of supply current. A capacitor to ground from this
pin sets the ramp time to full output current.
Signal Ground. All small-signal components, compensation
8
8, Exposed
Pad (17)
6, Exposed
Pad (17)
GND
components and the exposed pad on the bottom side of the IC
should connect to this ground, which in turn connects to PGND at
one point.
9, 16
9, 16
7, 14 PVDD Power Input Supply. Decouple this pin to PGND with a capacitor.
10,1 1,
14, 15
12, 13
10,1 1,
14, 15
12, 13
8, 9, 12, 13 LX
10, 11 PGND
Internal Power MOSFET Switches Output. Connect this pin to the
ind uc tor.
Power Ground. Connect this pin close to the terminal of CIN and
COUT.
DS8004-03 September 2007
www.richtek.com
3
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