1MHz, 1% Accurate, 6A Internal Switch

Step-Down Regulators

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7

ELECTRICAL CHARACTERISTICS (continued)

otherwise noted.) (Note 2)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

LX Minimum Duty Cycle

SYNC = GND,

10.5

%

FBSEL

FBSEL rising

0.22

FBSEL Input Threshold 1.8V

Where 1.8V feedback

switches in and out,

FBSEL falling

0.08

V

FBSEL rising

0.08

FBSEL Input Threshold 2.5V

Where 2.5V feedback

switches in and out,

FBSEL falling

0.22

V

FBSEL Input Current Low

FBSEL

FBSEL = GND

-50

µA

FBSEL Input Current High

FBSEL

50

µA

CTL1/CTL2

0.4

CTL1/CTL2 Input Threshold

1.6

V

-1

+1

CTL1/CTL2 Input Current

-1

+1

µA

Soft-Start Period

Time required for output to ramp up

2.9

4.5

ms

SYNC

SYNC Capture Range

0.4

1.2

MHz

SYNC Pulse Width

250

ns

0.4

SYNC Input Threshold

1.6

V

SYNC Input Current

-1

+1

µA

SYNCOUT

SYNCOUT Frequency Range

0.4

1.2

MHz

SYNCOUT

0.4

SYNCOUT Output Voltage

SYNCOUT

0.4

V

Note 2: Specifications to -40°C are guaranteed by design, not production tested.

Note 3: When connected together, the LX output is designed to provide 6A RMS current.