3

FN9007.7

April 13, 2005

Absolute Maximum Ratings

Thermal Information

PGND to GND

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±0.3V

Peak GATE Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1A

ESD Classification . . . . . . . . . . . . . . . . . . . . . Class 1 (HBM, 2500V)

NFB Pin Voltage. . . . . . . . . . . . . . . . . . . . . . ±10V (Transient, 10ms)

Operating Conditions

Temperature Range

ISL6401C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to 85°C

Supply Voltage Range (Typical). . . . . . . . . . . . . . . . . . . . . 5V

±10%

Thermal Resistance (Typical)

14 Lead SOIC (Note 6) . . . . . . . . . . . .

90

NA

16 Lead QFN (Note 7) . . . . . . . . . . . . .

46

9

Maximum Junction Temperature (Plastic Package) . -55°C to 150°C

Maximum Storage Temperature Range . . . . . . . . . . . -65°C to 150°C

Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . . 300°C

(SOIC - Lead Tips Only)

For Recommended soldering conditions see Tech Brief TB389.

CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the

device at these or any other conditions above those indicated in the operational sections of this specification is not implied.

NOTES:

6.

7.

“case temp” is measured at the center of the exposed metal pad on the package underside. See Tech Brief TB379.

8. All voltages are with respect to GND.

Electrical Specifications

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

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNITS

Supply Voltage Range

4.5

5.0

5.5

V

Shutdown Supply Current

SHDN = GND

-

55

100

µA

Start-Up Current

-

0.1

0.20

mA

Operating Supply Current

(Note 10)

-

3.7

6.0

mA

REFERENCE VOLTAGE

Output Voltage

1.237

1.25

1.262

V

Long Term Stability

-

5

-

mV

NEGATIVE FEEDBACK

Source Current

-1.0

2.0

mA

CURRENT SENSE

Maximum Input Signal

0.2

0.260

0.3

V

Input Bias Current

-2.0

0.0

2.0

µA

Overcurrent Threshold

0.4

0.52

0.6

V

ERROR AMPLIFIER

Open Loop Voltage Gain

-78-

dB

Gain-Bandwidth Product

10

-

-

MHz

Input Voltage

1.225

1.25

1.275

V

Input Bias Current

-1.0

-

µA

PWM

Maximum Duty Cycle

47

48

50

%

Minimum Duty Cycle

COMP = 0V

-

0

-

%

UNDERVOLTAGE LOCKOUT

Start Threshold

3.7

4.1

4.3

V

Stop Threshold

3.2

3.6

4.0

V

ISL6401