MP8714 – 17V, 10A, SYNCHRONOUS, STEP-DOWN CONVERTER

MP8714 Rev.1.0

www.MonolithicPower.com

10

12/27/2016

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PIN FUNCTIONS

QFN-14

PIN#

Name

Description

1

BST

Bootstrap. A capacitor is required between SW and BST to form a floating supply

across the high-side switch driver.

2

SW

Switch output. Connect SW using a wide PCB trace.

3, 4, 6

NC

No connection. Leave NC floating.

5

EN/SYNC

Enable/synchronize. Drive EN/SYNC high to enable the MP8714. EN/SYNC has an

internal 6.2µA pull-up current to 5V, so the MP8714 can start-up automatically when

EN/SYNC is floating. Apply an external clock to EN/SYNC to change the switching

frequency.

7

PG

Power good indication. PG is an open-drain structure. PG switches low if the output

voltage is out of regulation window. PG only indicates an under-voltage (UV) condition.

8

PGND

System power ground. PGND is the reference ground of the regulated output

voltage. Requires special consideration during PCB layout. Connect PGND to the

ground plane with copper traces and vias.

9

VIN

Supply voltage. The MP8714 operates from a 4.5V to 17V input rail. A ceramic

capacitor is required to decouple the input rail. Connect VIN using a wide PCB trace.

10

VOUT

Sense input of the output voltage. Connect VOUT to the positive terminal of the

load.

11

FB

Feedback. Connect FB to the tap of an external resistor divider from the output to

GND to set the output voltage in a FB control loop.

12

SS

Soft start. Connect a capacitor from SS to ground to set the soft-start time.

13

VCC

Internal LDO regulator output. Decouple VCC with a 0.47µF capacitor.

14

AGND

Signal ground. AGND is not internally connected to system ground directly. Ensure

that AGND is connected to system ground during PCB layout.