3

FN9244.7

September 19, 2008

Max Ramp Amplitude

1

Modulator Gain

9-

Min OFF Time

150

300

ns

REFERENCE AND SOFT-START

Internal Reference Voltage

1.21

V

Soft-Start Current

810

12

µA

Soft-Start Threshold

0.8

V

ERROR AMPLIFIER

Transconductance

3.9

5.7

7.2

mS

Gain-Bandwidth Product

GBW

15

MHz

Slew Rate

SR

6

V/µs

COMP Pin Drive

±200

µA

Internal Feedback Voltage

1.194

1.210

1.222

V

Internal Feedback Bias Current

±50

±100

nA

OVERCURRENT PROTECTION

Dynamic Current Limit ON Time

16

Clock

pulses

Dynamic Current Limit OFF Time

4

SS cycle

Switch Current Limit

3.2

4.0

4.8

A

POWER-GOOD (OPEN DRAIN)

Power-Good Lower Threshold

85

89

%

111

115

%

PGOOD Leakage Current

1

µA

PGOOD Voltage Low

0.5

V

MOSFET

Switch ON-Resistance

level

0.19

0.355

Ω

EN

Input HIGH Level (Asserted)

VINHIGH

2.6

V

Input LOW Level (Unasserted)

VINLOW

1.2

V

Input Current HIGH

25

µA

Input Current LOW

25

µA

SYNC

Input HIGH Level (Asserted)

VINHIGH

2.6

V

Input LOW Level (Unasserted)

VINLOW

1.2

V

Input Current HIGH

0.2

µA

Input Current LOW

0.2

µA

THERMAL SHUT-DOWN

Thermal Shut-down Temperature

Rising Threshold

150

°C

Thermal Shut-down Hysteresis

15

°C

Electrical Specifications

with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified. Temperature limits

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

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNITS

ISL8560