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DS20002090F-page 5

MCP73871

Current Regulation (Fast Charge Constant Current Mode)

AC-Adapter

Fast Charge

Current

IREG

90

100

110

mA

PROG1 = 10 k



TA = -5°C to +55°C, SEL = High

900

1000

1100

mA

PROG1 = 1 k



TA = -5°C to +55°C, SEL = High

USB Fast Charge

Current

IREG

80

90

100

mA

PROG2 = Low, SEL = Low,

(Note 2)

TA = -5°C to +55°C

400

450

500

mA

PROG2 = High, SEL = Low,

(Note 2)

TA = -5°C to +55°C

Input Current Limit Control (ICLC)

USB-Port Supply

Current Limit

ILIMIT_USB

80

90

100

mA

PROG2 = Low, SEL = Low

TA = -5°C to +55°C

400

450

500

mA

PROG2 = High, SEL = Low

TA = -5°C to +55°C

AC-DC Adapter Current

Limit

ILIMIT_AC

1500

1650

1800

mA

SEL = High, TA = -5°C to +55°C

Voltage Proportional Charge Control (VPCC - Input Voltage Regulation)

VPCC Input Threshold

VVPCC

—1.23

—

V

IOUT =10mA

TA = -5°C to +55°C

VPCC Input Threshold

Tolerance

VRTOL

–3

—

+3

%

Input Leakage Current

ILK

—0.01

1

µA

VVPCC =VDD

Precondition Current Regulation (Trickle Charge Constant Current Mode)

Precondition Current

Ratio

IPREG/IREG

7.5

10

12.5

%

PROG1 = 1.0 k

 to 10 k

TA = -5°C to +55°C

Precondition Current

Threshold Ratio

VPTH/VREG

69

72

75

%

VBAT Low-to-High

Precondition Hysteresis

VPHYS

—105

—

mV

VBAT High-to-Low

Automatic Charge Termination Set Point

Charge Termination

Current Ratio

ITERM

75

100

125

mA

PROG3 = 10 k



TA = -5°C to +55°C

7.5

10

12.5

mA

PROG3 = 100 k



TA = -5°C to +55°C

Automatic Recharge

Recharge Voltage

Threshold Ratio

VRTH

VREG – 0.21V VREG – 0.15V VREG – 0.09V

V

VBAT High-to-Low

IN-to-OUT Pass Transistor ON-Resistance

ON-Resistance

RDS_ON

—200

—

m



VDD =4.5V, TJ = 105°C

Charge Transistor ON-Resistance

DC CHARACTERISTICS (CONTINUED)

Electrical Specifications: Unless otherwise indicated, all limits apply for VIN =VREG + 0.3V to 6V, TA = -40°C to +85°C.

Typical values are at +25°C, VIN =[VREG (typical) + 1.0V]

Parameters

Sym

Min

Typ

Max

Units

Conditions

Note 1:

The value is ensured by design and not production tested.

2:

The maximum available charge current is also limited by the value set at PROG1 input.