6

FN9176.1

February 8, 2005

LINEAR REGULATOR

Drop-Out Voltage

Iout = 450mA (Note 4)

-

1.2

-

V

DSQIN, SEL18V INPUT PINs (Note 6)

Asserted Low

--

0.8

V

Asserted HIGH

1.7

-

-

V

Input Current

-1-

µA

CURRENT SENSE

Input Bias Current

-

700

-

nA

Overcurrent Threshold

Static current mode, DCL = H

325

400

500

mV

ERROR AMPLIFIER

Open Loop Voltage Gain

(Note 4)

70

88

-

dB

Gain Bandwidth Product

GBP

(Note 4)

10

-

-

MHz

PWM

Maximum Duty Cycle

90

93

-

%

Minimum Pulse Width

(Note 4)

-

20

-

ns

OSCILLATOR

Oscillator Frequency

200

220

240

kHz

THERMAL PROTECTION

Thermal Shutdown

Temperature Shutdown Threshold

(Note 4)

-

150

-

Temperature Shutdown Hysteresis

(Note 4)

-

20

-

NOTES:

3. Internal Digital Soft-start

IO = 450mA.

5. Guaranteed by Design.

6. Unused DSQIN pin should be connected to GND. SEL18V pins is internally connected to GND by a 200K resistor.

Electrical Specifications

access to the system. (Continued)

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNITS

ISL6425