7

FN6901.0

April 27, 2009

REFERENCE AND SOFT-START/ENABLE

Internal Reference Voltage

0.594

-

0.606

V

Soft-Start Current

-10-

µA

Soft-Start Threshold

1.0

-

-

V

Enable Low (Converter Disabled)

--

1.0

V

PWM CONTROLLER GATE DRIVERS

Gate Drive Peak Current

-0.7

-

A

Rise Time

Co = 1000pF

-

20

-

ns

Fall Time

Co = 1000pF

-

20

-

ns

Dead Time Between Drivers

-20-

ns

ERROR AMPLIFIER

DC Gain (Note 7)

-88-

dB

Gain-Bandwidth Product (Note 7)

GBW

-

15

-

MHz

Slew Rate (Note 7)

SR

-

6

-

V/µs

OVERCURRENT PROTECTION

OCSET Current Source

80

100

120

µA

POWER GOOD AND CONTROL FUNCTIONS

Power-Good Lower Threshold

Fraction of the set point; ~3µs noise filter

-14

-10

-8

%

Power-Good Higher Threshold

Fraction of the set point; ~3µs noise filter

9

-

16

%

PGOOD Leakage Current

-

-

1

µA

PGOOD Voltage Low

-

-

0.5

V

PGOOD Delay

CDEL = 0.1µF

-

125

-

ms

CDEL Current for PGOOD

CDEL threshold = 2.5V

-

2

-

µA

CDEL Threshold

-2.5

-

V

EXTERNAL REFERENCE

Min External Reference Input at

GPIO1/REFIN

-

0.600

-

V

Max External Reference Input at

GPIO1/REFIN

-

-

1.250

V

REFERENCE BUFFER

Buffered Output Voltage - Internal Reference

VMSET/MODE = High,

0.583

0.595

0.607

V

Buffered Output Voltage - Internal Reference

VMSET/MODE = High,

0.575

0.587

0.599

V

Buffered Output Voltage - External Reference

VMSET2/MODE = High,

1.227

1.246

1.265

V

Buffered Output Voltage - External Reference

VMSET2/MODE = High,

1.219

1.238

1.257

V

Electrical Specifications

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

ISL6420B