MP2496M – STEP-DOWN CONVERTER WITH SINGLE USB CHARGING PORT

MP2496M Rev.1.0

www.MonolithicPower.com

9

10/10/2015

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PIN FUNCTIONS

QFN-26

Pin #

Name

Description

1, 2

USB

USB output.

3, 15, 25

OUT

Buck output. OUT is the USB’s power input. Internal circuits sense the OUT

voltage and regulate it to 5V.

4, 14

IN

as possible. IN is the drain of the internal power device and the power supply

for the whole chip.

5, 6, 12, 13

PGND

Power ground. PGND is the reference ground of the regulated output voltage.

PGND requires extra care during PCB layout. Connect to GND with copper

traces and vias.

7

FREQ

Frequency selection. Float FREQ to set the frequency to 150kHz. Pull FREQ

to ground to set the frequency to 250kHz. Pull FREQ to high to set the

frequency to 350kHz.

8

EN

On/Off control input.

9, 10, 26

SW

Switch output. Connect using a wide PCB trace.

11

BST

Bootstrap. Requires a 0.1µF capacitor between SW and BST to form a floating

supply across the high-side switch driver.

16, 17

NC

No connection. NC can be connected to OUT for better thermal dissipation.

18

AGND

Analog ground. Connect AGND to PGND.

19

VCC

Internal 5V LDO regulator output. Decouple VCC with a 0.22µF capacitor.

20

VDROP

Line drop compensation selection. Refer to the EC table for detailed

specifications.

21, 22

NC

No connection. NC must be left floating.

23

DP

D+ data line to the USB connector. Input/output used for handshaking with

portable devices.

24

DM

D- data line to the USB connector. Input/output used for handshaking with

portable devices.