MP2144 – 2A, 5.5V, 1.2MHz. 40μA I
Q
, SYNCHRONOUS STEP-DOWN SWITCHER
MP2144 Rev. 1.03 www.MonolithicPower.com 8
12/20/2012 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
PIN FUNCTION
TSOT23
Pin #
Name Description
1 PG
Power Good Indicator. The output of this pin is an open drain with an internal pull up
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.
2 VIN
Supply Voltage. The MP2144 operates from a +2.5V-to-+5.5V unregulated input. C1
prevents large voltage spikes from appearing at the input.
3 SW Switch Output
4 PGND Power Ground
5 OUT Input Sense. For output voltage sense.
6 AGND Analog Ground. Internal control circuit reference.
7 FB
Feedback. Connect an external resistor divider from the output to GND to set the output
voltage.
8 EN On/Off Control
