MP8606

– 6A, 6.5V SYNCHRONOUS STEP-DOWN CONVERTER

MP8606 Rev. 1.03

www.MonolithicPower.com

4

8/2/2013

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PIN FUNCTIONS

Pin #

Name

Description

1

AGND

Analog ground.

2

Freq

Frequency. Set during CCM operation. Connect a resistor to IN for line feed-forward.

3

FB

Feedback. Sets the output voltage from the tap of an external resistor divider from

the output to GND.

4

SS/TRK

Soft-Start. Connect on external capacitor to program the soft start time for the switch

mode regulator.

5

EN

En=1 to enable the MP8606. For automatic start-up, connect EN pin to VIN with

100k

Ω resistor.

6

PGOOD

Power-Good Open-Drain Output. HIGH output indicates that the output is within +/-

10% of the regulation value. LOW output indicates that the output is out of +/-10%

window. There is a 0.5 ms delay

from FB ≥ 90% to PGOOD goes high.

7

BST

Bootstrap. Connect a capacitor between this pin and SW to provide a floating supply

for the high-side gate driver.

8, 21, 22

SW

Switch Node. Connect to the inductor. Connects to the internal high-side and low-

side power MOSFET switches. All SW pins must be connected together externally.

9-16

PGND

Power Ground. Connect these pins to the negative terminals of the input and output

capacitors using large copper areas. Connect to AGND through a single point.

17, 19, 20

IN

Input Supply. Powers the high-side switch. Requires a decoupling capacitor to

ground close to this pin to reduce switching spikes. Connect all IN pins together

externally.

18

VCC

Bias Supply. Power both the internal control circuitry and gate drivers. Requires a

decoupling capacitor to ground close to this pin.