MP2631 Rev.0.9

www.MonolithicPower.com

3

9/15/2008

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Parameter

Symbol Condition

Min

Typ

Max

Units

UVLO Hysteresis

150

mV

SHDN Trip Threshold High

1.5

V

SHDN Trip Threshold Low

0.4

V

CHG

, ACOK Sink Current

Pin Voltage = 0.2V

4

mA

Battery Reverse Current to

BATT Pin

SHDN = Low and Input = Floating

or 0V

1

µA

Soft Thermal Shutdown

Threshold

Tlim

105

120

135

°C

Soft Thermal Shutdown

Hysteresis

10

°C

Soft-Start Time

From trickle to 90% of full current,

(Css absent)

300

us

Recharge Voltage

Threshold

3.9

4.0

4.1

V

Recharge Voltage

Hysteresis

100

mV

Notes:

PIN FUNCTIONS

Pin #

Name

Description

1

IN

Input Supply Pin. IN receives the AC adapter or USB supply voltage.

2

SS/NC

Soft Start Pin. If it is left open, internal fixed SS is operated and the charger will not

charge a battery when its initial voltage is higher than the recharge threshold (4.0V).

3

ACOK

Open-Drain Input Fault Indicator. This pin is low when 2.1V < Vin < 7.0V

4

CHG

Open-Drain Charge Indicator. This pin is low during charging, is High after battery full

or termination.

5

GND

Exposed Pad

Ground. Exposed pad and GND pin must be connected to same ground plane

6

SHDN

Used for Charger Termination. An input “Low” signal at this pin or if the pin floating will

enable the charger.

7

NC

No Connection

8

ISET

Constant Charge Current Program pin. Connect this pin to an external resistor to

program the charging current in CC Mode.

9

BATT

Charger Output

10

LDO

LDO output