Dual, 180° Out-of-Phase, 1.4MHz, 750mA Step-

Down Regulator with POR and RSI/PFO

6

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ELECTRICAL CHARACTERISTICS (continued)

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

PFO (MAX1970 and MAX1972 Only)

4.12

PFO Trip Threshold

3.86

V

PFO Output Current, High

PFO = IN

-1

1

µA

PFO Output Voltage, Low

0.05

V

EN AND RSI (MAX1971 Only)

0.4

Logic Input Thresholds

IN = 2.6V to 5.5V

1.6

V

RSI Input Resistance

Internal pullup resistor to IN

5

20

k

Ω

-1

1

EN Logic Input Current

Logic Input at 0 or

-1

1

µA

Note 1: Refer to the Output Voltage Selection section.

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