High-Frequency,

Low-Cost SMBus Chargers

4 ______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

ACOK

ACOK Sink Current

1

mA

ACOK Leakage Current

1

F

A

ACIN

ACIN Threshold

Rising, 20mV (typ) hysteresis

1.465

1.485

1.53

V

ACIN Input Bias Current

-1

+1

F

A

ITHR/ADAPTLIM

ITHR Leakage Current

-1

+1

F

A

ADAPTLIM Sink Current

1

mA

ADAPTLIM Leakage Current

1

F

A

ITHR Threshold

-12

+12

mV

LOGIC LEVELS

SDA/SCL Input Low Voltage

0.8

V

SDA/SCL Input High Voltage

2.1

V

SDA/SCL Input Bias Current

-1

+1

F

A

SWITCHING REGULATOR

DHI Off-Time K Factor

55

61

67

ns/V

93

100

107

Sense Voltage for Minimum

Discontinuous Mode

Ripple Current

5

mV

Zero-Crossing Comparator

Threshold

5

mV

Cycle-by-Cycle Current-Limit

Sense Voltage

120

125

130

mV

DHI Resistance High

1.5

3

I

DHI Resistance Low

0.8

1.6

I

DLO Resistance High

3

6

I

DLO Resistance Low

3

6

I

ADAPTER DETECTION

Adapter Absence Detect

Threshold

50

120

200

mV

Adapter Detect Threshold

340

430

600

mV

CHARGE-PUMP MOSFET DRIVER

PDSL Gate-Driver Source Current

40

64

F

A

PDSL Gate-Driver Output Voltage

HIGH

+ 5.3

+ 8

V