MAX1970_09 datasheet(6/21 Pages) MAXIM

Part #	MAX1970

Description	Dual, 180° Out-of-Phase, 1.4MHz, 750mA Step- Down Regulator with POR and RSI/PFO

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Manufacturer	MAXIM [Maxim Integrated Products]

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6 / 21 page

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

Down Regulator with POR and RSI/PFO

6

_______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(VIN = VCC = VEN = 5V, VFB1 = VFB2 = 1.15V, R POR = 100kΩ to IN, RPFO = 100kΩ to IN, RSI = 0, CVCC = 0.1µF, CREF = 0.1µF,

FBSEL1 = unconnected, FBSEL2 = unconnected, TA = -40°C to +85°C.) (Note 2)

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

PFO (MAX1970 and MAX1972 Only)

VCC rising

4.12

PFO Trip Threshold

IN = VCC

VCC falling

3.86

V

PFO Output Current, High

PFO = IN

-1

1

µA

PFO Output Voltage, Low

IPFO = 1mA, VIN = 4.3V

0.05

V

EN AND RSI (MAX1971 Only)

VIL

0.4

Logic Input Thresholds

IN = 2.6V to 5.5V

VIH

1.6

V

RSI Input Resistance

Internal pullup resistor to IN

5

20

k

Ω

VIL

-1

1

EN Logic Input Current

Logic Input at 0 or

5.5V, VIN = 5.5V

VIH

-1

1

µA

Note 1: See the

Output Voltage Selection section.

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

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