MP2625B – SINGLE CELL SWITCHING CHARGER WITH POWER PATH CONTROL

MP2625B Rev. 1.01

www.MonolithicPower.com

4

1/15/2018

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PIN FUNCTIONS

Package

Pin #

Name

Description

1

BST

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

across the power switch driver to drive the power switch’s gate above the supply voltage.

3

IN

Power input of the IC from adapter or USB.

2,4

SW

Switch output.

5

PGND Power ground.

6

EN

_____

Function logic control pin of the IC. Logic low to enable the part and logic high to disable the

part.

7

M0

Mode Select Input Pin, in combination with M1 pin, setting the input current limit mode.

8

M1

Mode Select Input Pin, in combination with M0 pin, setting the input current limit mode.

9

CHGOK

_____________

Open drain output. It is pulled low during charging. And it is pulled high through an external

resistor to VCC to indicate charge completed.

10

ACOK

__________

Open drain output. It is pulled low to indicate the presence of a valid input power supply.

Otherwise, it is pulled high through an external resistor to VCC to indicate invalid input or

removed input.

11

AGND Analog ground.

12

SYSFB

SYS voltage program pin. Connect a resistor divider from the pin to SYS and AGND to

program the system output voltage. Leave the pin float to disable the function.

13

SYS

DC-DC regulator output to power the system load and charge the battery.

14

BATT

Positive battery terminal.

15

ISET

Charge current program pin. A resistor from the pin to AGND can program the charge

current during CC charge. Float the pin will disable the charge function.

16

NTC

Thermistor input. Connect a resistor from this pin to VCC and the thermistor from this pin to

ground. The thermistor is usually inside the battery pack.

17

ILIM

Input current limit program pin. A resistor from the pin to AGND can program the input

current limit with adapter input.

18

TMR

Set timer out period. Connect TMR pin to AGND to disable the internal timer.

19

VLIM

Input voltage clamp program pin.

20

VCC

Supply voltage of the IC.