RT8015APQW 데이터 시트보기 (PDF) - Richtek Technology
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RT8015APQW Datasheet PDF : 14 Pages
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RT8015A
Typical Application Circuit
VIN
5V
ROSC
332k
RT8015A
1 SHDN/RT
10
COMP
2 GND
3, 4
LX
FB 9
8
VDD
5 PGND
PVDD 6, 7
L1
2µH
RCOMP
30k
CIN
22µF
C1
22pF
CCOMP
1000pF
R2 240k
R1
510k
COUT
22µFx2
VOUT
2.5V/3A
Note : Using all Ceramic Capacitors
Functional Pin Description
Pin No.
1
2
3, 4
Pin Name
Pin Function
Oscillator Resistor Input. Connecting a resistor to ground from this pin sets the
SHDN/RT
switching frequency. Forcing this pin to VDD causes the device to be shut down.
GND
Signal Ground. All small-signal components and compensation components should
connect to this ground, which in turn connects to PGND at one point.
LX
Internal Power MOSFET Switches Output. Connect this pin to the inductor.
5
PGND
6, 7
PVDD
8
VDD
9
FB
10
COMP
11 (Exposed Pad) NC
Power Ground. Connect this pin close to the negative terminal of CIN and COUT.
Power Input Supply. Decouple this pin to PGND with a capacitor.
Signal Input Supply. Decouple this pin to GND with a capacitor. Normally VDD is
equal to PVDD.
Feedback Pin. This pin Receives the feedback voltage from a resistive divider
connected across the output.
Error Amplifier Compensation Point. The current comparator threshold increases
with this control voltage. Connect external compensation elements to this pin to
stabilize the control loop.
No Internal Connection. The exposed pad must be soldered to a large PCB and
connected to GND for maximum power dissipation.
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2
DS8015A-04 March 2011
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