MP2147 – 5.5V, 4A, 1.2MHz, COT, BUCK SWITCHER

MP2147 Rev. 1.1

www.MonolithicPower.com

11

6/8/2016

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PIN FUNCTIONS

Package

Pin #

Name Description

1, 9

SW

Switch Node. Connect to the inductor. This pin connects to the internal high-side and low-

side power MOSFET switches.

2

OUT

Output Voltage Sensing pin.

3

FB

Feedback. Input to the error amplifier. Connect to an external resistor divider between the

output and GND. Comparing the FB voltage to the internal 0.6V reference sets the

regulation voltage.

4

RAMP External Ramp. Sets the ramp to optimize the transient performance.

5

EN

Enable. EN is high voltage level to enable. For automatic start-up, connect EN pin to VIN

pin with a pull-up resistor.

6

MODE

/VCON

Multi-Use Pin. 1. PWM and PFM Selection. When MODE is more than 1.2V, MP2147

enters PWM mode. When MODE is lower than 0.4V or floating, MP2147 enters PFM

mode. 2. Analog Voltage Dynamic Regulation. Analog voltage input pin which control

output voltage by PWM mode.

7

PG

Power Good. The output of this pin is an open drain with internal pull up resistor to VIN.

PG is pulled up to VIN when the FB voltage is within 10% of the regulation level, otherwise

pin goes HIGH.

8,

Exposed

Pad

VIN

Input Supply. Requires a decoupling capacitor to ground to reduce switching spikes.

10, 11,12

GND

IC Ground. Connect these pins to larger copper areas to the negative terminals of the

input and output capacitors.