MP20045 – LOWER NOISE, 1A LINEAR REGULATOR
PIN DESCRIPTION
QFN8 (3X3)
Pin #
1, 2
SOIC8E
Pin #
7, 8
Name
VIN
Description
Regulator Input. Supply voltage ranges from +2.5V to 5.5V. Bypass with
2.2μF capacitor. These pins must be externally connected for proper
operation even if they are internally connected.
Regulator output. Bypass with a 2.2μF low-ESR capacitor to GND.
Connect all the pin together externally.
Feedback Input.
For the adjustable output version, connect FB to the center point of the
external resistor divider. The feedback threshold voltage is 1.5V.
For the fixed output version, connect FB to the output directly.
Ground. Connect exposed pad to GND plane for optimal thermal
performance.
Open-drain power-good (PG) output.
Positive polarity enable (EN) input. Regulator Enable Control Input. Drive
EN above 1.5V to turn on the MP20045. Drive EN below 0.4V to turn it off.
Do not float the EN pin.
3, 4
1, 2
VOUT
5
3
FB
6
7
8
4
5
6
GND
Expose
d pad
PG
EN
MP20045 Rev. 1.01
www.MonolithicPower.com
4/21/2017
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