12V, 8A 1.2MHz

Step-Down Regulator

4

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ELECTRICAL CHARACTERISTICS (continued)

unless otherwise noted.)

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

SYNC

SYNC Capture Range

0.25

1.20

MHz

100

SYNC Pulse Width

100

ns

0.4

SYNC Input Threshold

1.6

V

10

nA

SYNC Input Current

7µA

SYNCOUT

SYNCOUT Frequency Range

0.25

1.2

MHz

SYNCOUT Phase Shift from

SYNCIN or Internal Oscillator

Frequency = 1MHz

170

180

190

Degrees

SYNCOUT Output Voltage

±1mA

0.2

V

THERMAL SHUTDOWN

Thermal-Shutdown Threshold

When LX stops switching

+165

°C

Thermal-Shutdown Hysteresis

20

°C

POWER-GOOD

PWRGD Threshold Voltage

90

% of

REFIN

PWRGD Falling Edge Deglitch

48

Clock

cycles

PWRGD Output Voltage Low

0.03

0.06

V

PWRGD Leakage Current

0.01

1

µA