MAX15022 datasheet(4/28 Pages) MAXIM

Part #	MAX15022

Description	Dual, 4A/2A, 4MHz, Step-Down DC-DC Regulator with Dual LDO Controllers

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Manufacturer	MAXIM [Maxim Integrated Products]

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4 / 28 page

Dual, 4A/2A, 4MHz, Step-Down DC-DC

Regulator with Dual LDO Controllers

4

_______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(VAVIN = VPVIN_ = VDVDD_ = 3.3V, VPGND_ = VSGND = 0V, RT = 25kΩ, and TA = TJ = -40°C to +125°C, unless otherwise noted.

Typical values are at TA = +25°C.) (Note 3)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

ENABLE/SEL

EN_ Threshold

VEN_ rising

1.207

1.225

1.243

V

EN_ Hysteresis

0.12

V

EN_ Input Current

-2.5

+2.5

µA

SEL High Threshold

0.85 x VAVIN

V

SEL Low Threshold

0.2 x VAVIN

V

SEL Input Bias Current

Present only during startup

-100

+100

µA

OSCILLATOR

Switching Frequency Range

fSW

fSW = 4MHz x [VRT(V)/1.067(V)] (Note 4)

4000

kHz

fSW

≤ 1500kHz

-6

+6

Oscillator Accuracy

fSW > 1500kHz

-10

+10

%

Phase Shift Between Regulators

180

Degrees

RT Current

0 < VRT < 1.067V

31.30

32.00

32.58

µA

RT Voltage Range

VRT

0.130

1.067

V

Minimum Controllable On-Time

60

ns

Minimum Controllable Off-Time

60

ns

PWM Ramp Amplitude

VAVIN/4

V

PWM Ramp Valley

0.3

V

THERMAL SHUTDOWN

Thermal Shutdown Temperature

Temperature rising

+160

°C

Thermal Shutdown Hysteresis

15

°C

Note 3: Specifications are 100% production tested at TA = +25°C and TA = +125°C. Maximum and minimum specifications over

temperature are guaranteed by design.

Note 4: When operating with VAVIN = 2.5V, the maximum operating frequency should be derated to 3MHz.

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