7

FN6799.0

January 15, 2009

Maximum Duty Cycle (ISL9440C)

86

%

Minimum Duty Cycle (ISL9440C)

6%

FB Bias Current (Note 6)

50

nA

Peak-to-Peak Sawtooth Amplitude (Note 6)

1.6

V

0.667

V

Ramp Offset

1

V

PWM GATE DRIVER CHANNEL 1, 2 (UGATE1, 2; LGATE 1, 2) (Note 6)

Source Current

800

mA

Sink Current

2000

mA

Upper Drive Pull-Up

VCC_5V = 5.0V

4

8

Ω

Upper Drive Pull-Down

VCC_5V = 5.0V

1.6

3

Ω

Lower Drive Pull-Up

VCC_5V = 5.0V

4

8

Ω

Lower Drive Pull-Down

VCC_5V = 5.0V

0.9

2

Ω

Rise Time

18

ns

Fall Time

18

ns

PWM GATE DRIVER CHANNEL 3 (UGATE3; LGATE 3) (Note 6)

Sink/Source Current

400

mA

Upper Drive Pull-Up

VCC_5V = 5.0V

8.0

12

Ω

Upper Drive Pull-Down

VCC_5V = 5.0V

3.2

6.0

Ω

Lower Drive Pull-Up

VCC_5V = 5.0V

8

12

Ω

Lower Drive Pull-Down

VCC_5V = 5.0V

1.8

3.5

Ω

Rise Time

18

ns

Fall Time

18

ns

LOW DROP OUT CONTROLLER

Drive Sink Current

LDOFB = 0.76V

50

mA

FB Threshold Voltage

IG4 = 21mA

0.800

V

Amplifier Trans-conductance

2A/V

LDOFB Input Leakage Current (Note 6)

LDOFB = 0.8V

50

nA

ENABLE1, ENABLE2, ENABLE3 THRESHOLD and SOFT-START CURRENT

EN/SSx Enable Threshold

1.1

1.3

1.55

V

EN/SSx Soft-Start Charge Current

VEN/SSx = 1.3V

1.1

1.55

2.0

µA

POWER-GOOD MONITORS

PGOOD Upper Threshold, PWM 1, 2 and 3

105.5

111

115.5

%

PGOOD Lower Threshold, PWM 1, 2 and 3

87

91

96

%

PGOOD for Linear Controller

70

75

80

%

PGOOD Low Level Voltage

I_SINK = 4mA

0.4

V

PGOOD Leakage Current

PGOOD = 5V

0.025

1

µA

Electrical Specifications

Recommended operating conditions unless otherwise noted. Refer to Block Diagram and Typical Application

specified. Temperature limits established by characterization and are not production tested. (Continued)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNITS

ISL9440B, ISL9440C