MP2214 – 16V, 4A, 600kHz SYNCHRONOUS STEP-DOWN CONVERTER
PIN FUNCTIONS
8-SOICE 14-QFN
Name
Description
Pin #
Pin #
Bias Supply. This supplies power to both the internal control circuit and the
gate drivers. A decoupling capacitor to ground is required close to this pin.
5
8
VCC
IN
Input Supply. This supplies power to the high side switch. A decoupling
capacitor to ground is required close to this pin to reduce switching spikes.
3
5, 10
4, 11
Switch Node Connection to the Inductor. These pins connect to the internal
high and low-side power MOSFET switches. All SW pins must be
connected together externally.
6，7
SW
PGND,
AGND,
Exposed
Pad
Ground. Connect these pins with larger copper areas to the negative
terminals of the input and output capacitors. Connect exposed pad to GND
plane for proper thermal performance.
2
1, 3, 12
Bootstrap. A capacitor between this pin and SW provides a floating supply
for the high-side gate driver.
4
1
7
BS
Feedback. This is the input to the error amplifier. An external resistive
divider connected between the output and GND is compared to the internal
0.8V reference to set the regulation voltage.
14
FB
Enable and Frequency Synchronization Input Pin. Forcing this pin below
0.4V shuts down the part. Forcing this pin above 1.6V turns on the part.
Applying a 500kHz to 2MHz clock signal to this pin synchronizes the
internal oscillator frequency to the external source.
8
13
EN/SYNC
9
POK
N/C
Power Good Pin.
No Connect.
2, 6
MP2214 Rev. 0.9
9/1/2010
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4
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