MP2144 – 2A, 5.5V, 1.2MHz. 40μA IQ, SYNCHRONOUS STEP-DOWN SWITCHER
PIN FUNCTION
TSOT23
Pin #
Name Description
Power Good Indicator. The output of this pin is an open drain with an internal pull up
1
PG
resistor to IN. PG is pulled up to VIN when the FB voltage is within 10% of the regulation
level. If the FB voltage is out of that regulation range, it is LOW.
Supply Voltage. The MP2144 operates from a +2.5V-to-+5.5V unregulated input. C1
prevents large voltage spikes from appearing at the input.
2
VIN
SW
3
4
5
6
Switch Output
PGND Power Ground
OUT Input Sense. For output voltage sense.
AGND Analog Ground. Internal control circuit reference.
Feedback. Connect an external resistor divider from the output to GND to set the output
voltage.
7
8
FB
EN
On/Off Control
MP2144 Rev. 1.03
12/20/2012
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