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

Down Regulator with POR and RSI/PFO

2

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ABSOLUTE MAXIMUM RATINGS

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

IN, EN, FBSEL1, FBSEL2, PFO, POR,

COMP1, COMP2, FB1, FB2,

PGND to GND .......................................................-0.3V to +0.3V

16-pin QSOP (derate 8.3mW/°C above +70°C)...........667mW

Operating Temperature Range ...........................-40°C to +85°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

ELECTRICAL CHARACTERISTICS

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

IN Voltage Range

2.6

5.5

V

MAX1971

5

10

IN Supply Current

Switching with no load

MAX1970/MAX1972

10

20

mA

MAX1970/MAX1972

1

100

IN Shutdown Current

MAX1971

1

60

µA

2.40

2.55

Lockout Threshold

2.20

2.35

V

REF

REF Voltage

1.188

1.200

1.212

V

REF Shutdown Resistance

10

25

Ω

REF Soft-Start Current

20

25

30

µA

FB1 AND FB2

FB_ Regulation Voltage

FBSEL_ = unconnected, OUT1 = FB1, OUT2 = FB2,

1.188

1.200

1.212

V

OUT_ Voltage Range

FBSEL_ = unconnected

1.2

V

1.782

1.800

1.818

OUT1 Regulation Voltage

3.2670

3.3

3.330

V

1.485

1.5

1.150

OUT2 Regulation Voltage

2.475

2.5

2.525

V

Maximum Output Current

Guaranteed by design (Note 1)

750

mA

FBSEL1 = GND

30

60

120

FB1 Input Resistance

Measured from FB1 to

GND

30

60

120

k

Ω

FBSEL2 = GND

22.5

45

90

FB2 Input Resistance

Measured from FB2 to

GND

22.5

45

90

k

Ω

FB_ Input Bias Current

0.01

0.1

µA