MP2009-ULTRA LOW NOISE, LOW DROPOUT,120mA LINEAR REGULATOR
PCB LAYOUT GUIDE
PCB layout is very important to achieve good
regulation, ripple rejection, transient response
and thermal performance. It is highly
recommended to duplicate EVB layout for
optimum performance.
2) Ensure all feedback connections are short
and direct. Place the feedback resistors and
compensation components as close to the
chip as possible.
3) Connect IN, OUT and especially GND
respectively to a large copper area to cool
the chip to improve thermal performance and
long-term reliability.
If change is necessary, please follow these
guidelines and take figure 2 for reference.
1) Input and output bypass ceramic capacitors
are suggested to be put close to the IN Pin
and OUT Pin respectively.
INPUT
OUTPUT PRESET
1.5V to 4.5V
2V to 6V
VIN
OUT
C
IN
1uF
R1
100k
MP2009
EN
C
OUT
GND
1uF
Figure 2 —MP2009 Typical Application Circuit
VOUT
COUT
VIN
R1
R1
1
2
3
VIN OUT
GND
5
4
CIN
EN
NC
GND
Figure 3—MP2009 Top Layer
MP2009 Rev. 1.2
12/18/2013
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