6

FN9110.4

April 13, 2007

0.77

0.79

0.81

V/V

ERROR AMPLIFIER

Open Loop Voltage Gain

(Note 5)

60

90

-

dB

Gain-Bandwidth Product

(Note 5)

-

15

-

MHz

Reference Voltage Initial Accuracy

2.465

2.515

2.565

V

Reference Voltage

2.44

2.515

2.590

V

0.31

0.33

0.35

V/V

COMP to PWM Offset

COMP = 4V (Note 5)

0.51

0.75

0.88

V

FB Input Bias Current

-2

0.1

2

μA

COMP Sink Current

2

6

-

mA

COMP Source Current

-0.25

-0.5

-

mA

COMP VOH

4.25

4.4

5.0

V

COMP VOL

0.4

0.8

1.2

V

PSRR

Frequency = 120Hz (Note 5)

60

80

-

dB

2.4

2.5

2.6

V

OSCILLATOR

Frequency Accuracy

289

318

347

kHz

-2

2

3

3

%

Temperature Stability

(Note 5)

-

8

-

%

Maximum Duty Cycle

(Note 6)

68

75

81

%

Comparator High Threshold - Free Running

-

3.00

-

V

Comparator High Threshold - with External SYNC

(Note 5)

-

4.00

-

V

Comparator Low Threshold

-

1.50

-

V

Discharge Current

0 to +105°C

-40 to +105°C

0.75

0.70

1.0

1.0

1.2

1.2

mA

SYNCHRONIZATION

Input High Threshold

--

2.5

V

Input Pulse Width

25

-

-

nS

Input Frequency Range

(Note 5)

0.65 x Free

Running

-1.0

MHz

Input Impedance

-4.5

-

k

Ω

VOH

2.5

-

-

V

VOL

-

-

0.1

V

SYNC Advance

SYNC rising edge to GATE falling

-25

55

ns

Output Pulse Width

50

-

-

ns

Electrical Specifications

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

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNITS

ISL6721