MP2603 – SINGLE CELL 150mA LINEAR LI-ION BATTERY CHARGER

MP2603 Rev. 1.01

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4

1/31/2013

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PIN FUNCTIONS

Pin #

Name Description

1

IPGM

Charge Current Program Pin. Connect to a resistor to program the charge current. Do not

connect a capacitor to this pin.

2

GND

Chip Ground Return. Connect to the system ground.

3

CHGZ

Open-Drain Charge Status Indication Pin. It can be connected through an LED and a 430Ω

resistor to BATT for visual indication or through a 1kΩ resistor to BATT for use with a

microcontroller.

4

IN

Input Supply Pin. Connect to a 5V (±5%) power supply. The maximum surge voltage must be

less than 25V. Decouple this pin with a minimum of 0.1µF ceramic capacitor.

5

BATT

Charger Output. Connect to the battery. Placing a capacitor to GND on this pin is optional.

BLOCK DIAGRAM

BATTERY

CHARGE

CONTROL

2

IPGM

IN

BATT

CHGZ

GND

1

4

5

3

R

Figure 1—Functional Block Diagram