MP2000 – LOW INPUT VOLTAGE, 150mA LINEAR REGULATOR
MP2000 Rev. 1.11 www.MonolithicPower.com 8
10/10/2011 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
APPLICATION INFORMATION
Setting the Output Voltage
The output voltage can be adjusted by
changing the values of the external resistor
divider.
Use the following equation to determine these
values:
⎟
⎠
⎞
⎜
⎝
⎛
+×=
2R
1R
1V5.0V
OUT
Typically R1 + R2 are recommended to be less
than 100kΩ.
In Figure 2, C2 is added for improved transient
response.
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.
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.
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.
MP2000
FB
OUT
4
5
GND
2
EN
IN
3
1
OUTPUT
1.2V
V
IN
1.35V to 6V
V
IN
C3
C1
R1
C2
R2
C1
1
2
34
5VIN
GND
FB
OUT
C3
VIN
VOUT
GND
R1
R2 C2
C3
C2
C3
EN
Top Layer
Figure 2—PCB Layout
