MPQ2451-5/33―36V, 2.2MHz, 0.6A, STEP-DOWN CONVERTER, AEC-Q100 QUALIFIED
PIN FUNCTIONS
SOT23-6L QFN-6L
Name
Description
Pin #
Pin #
Bootstrap. Positive power supply for the internal, floating, high-side
1
6
BST
MOSFET driver. Connect a bypass capacitor between this pin and SW
pin.
Ground. Connect the output capacitor as close to this pin as possible.
Avoid routing near high-current switch paths.
2
3
5
4
GND
OUT
Output-Voltage Sense. Connected to the tap of an internal resistor divider
to set the output voltage.
Enable. Pull this pin below the specified threshold to shut the chip down.
Pull it above the specified threshold to enable the chip. Float this pin to
disable the chip.
4
3
EN
Input Supply. Supplies power to all internal control circuitry. Requires a
decoupling capacitor to ground to reduce switching spikes.
5
6
2
1
VIN
SW
Switch Node. Output of the high-side switch. Requires a low-VF Schottky
diode connected to ground to reduce switching spikes.
MPQ2451-5/33 Rev 1.0
5/25/2016
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