4

FN9094.7

May 4, 2009

Soft-Start Current During Start-Up

--4.5-

µA

Soft-Start Complete Threshold

(Note 5)

-

1.5

-

V

PWM CONVERTERS

Load Regulation

-2.0

-

+2.0

%

VSEN Pin Bias Current

(Note 5)

-

80

-

nA

Minimum Duty Cycle

-4-

%

Maximum Duty Cycle

-87-

%

VOUT Pin Input Impedance

VOUT = 5V

-

134

-

k

Ω

Undervoltage Shut-Down Level

Fraction of the set point; ~2µs noise filter

70

75

80

%

Overvoltage Protection

Fraction of the set point; ~2µs noise filter

110

115

-

%

GATE DRIVERS

Upper Drive Pull-Up Resistance

-

4

8

Ω

Upper Drive Pull-Down Resistance

-

2.3

4

Ω

Lower Drive Pull-Up Resistance

-

4

8

Ω

Lower Drive Pull-Down Resistance

-

1.1

3

Ω

POWER GOOD AND CONTROL FUNCTIONS

Power Good Lower Threshold

Fraction of the set point; ~3µs noise filter

84

89

92

%

Power Good Higher Threshold

Fraction of the set point; ~3µs noise filter.

110

115

120

%

PGOODx Leakage Current

-

-

1

µA

PGOODx Voltage Low

-

0.5

1

V

ISEN Sourcing Current

(Note 5)

-

-

260

µA

OCSET Sourcing Current Range

2-

20

µA

EN - Low (Off)

--

0.8

V

EN - High (On)

2.0

-

-

V

Continuous-Conduction-Mode(CCM)

Enforced (HYS Operation Inhibited)

VOUTX pulled low

-

-

0.1

V

Automatic CCM/HYS Operation

Enabled

VOUTX connected to the output

0.9

-

-

V

DDR - Low (Off)

--

0.8

V

DDR - High (On)

3-

-

V

DDR REF Output Voltage

0.99*

1.01*

V

DDR REF Output Current

DDR = 1 (Note 5)

-

10

12

mA

Electrical Specifications

Recommended Operating Conditions, Unless Otherwise Noted. Parameters 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

ISL6227