MP2611 – 2A, 1-CELL SWITCHING CHARGER FOR USB AND ADAPTER POWER

MP2611 Rev. 1.12

www.MonolithicPower.com

10

12/7/2012

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© 2012 MPS. All Rights Reserved.

PIN FUNCTIONS

Package

Pin #

Name

Description

1

ACIN

AC Adapter Power Input. Bypass ACIN to PGND with at least a 4.7μF ceramic capacitor

when the pin is not applied for powering.

2

PGND

Power Ground. Voltage reference for the regulated output voltage: Take extra care with

its layout. Place this node should be placed outside of the switching diode (SW-pin) to the

input ground path to prevent switching current spikes from inducing voltage noise into the

part.

3

SW

Switch Output. Connect to the switched side of the external inductor.

4

USBIN

USB Power Input. Bypass USBIN to PGND with at least a 4.7μF ceramic capacitor when

the pin is not applied for powering.

5

AGND

Analog Ground.

6

VREF33 Internal Linear Regulator Reference Output. Powered from ACIN or USBIN.

7

USBM

USB Input Current-Limit Set. Connect a resistor from this pin to AGND to program the

USB mode input current limit.

8

BATT

Positive Battery Terminal.

9

CSP

Battery Current Sense Positive Input. Connect resistor RS1 between CSP and BATT to

sense the charge current.

10

EN

On/Off Control Input.

11

STAT1

12

STAT2

Charging Status Indicator: 1. Charging; 2. End of charge; 3. Charging Suspended;

4. Fault; 5. Invalid Input Supply.

13

NTC

Thermistor Input. Connect a resistor from this pin to the VREF33 and the thermistor from

this pin to AGND.

14

TMR

Internal Safety Timer Control. Connect a capacitor from this node to AGND to set the

timer. And the timer can be disabled by connecting this pin to AGND.