DFE252012F-R47M datasheet(13/122 Pages) AD

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Electrical Characteristics—Quad-Phase Configurable Buck Converter (continued)

(VSYS = VINx = 12V, VOUT1 = 0.8V (M1_RNG = 0x0), VOUT2 = 1.1V (M2_RNG = 0x1), VOUT3 = 1.8V (M3_RNG = 0x1), VOUT4 = 3.3V

(M4_RNG = 0x2), single-phase configuration, VCE = 1.8V, VIO = 1.8V, TA = TJ = -40°C to +125°C, typical values are at TA = TJ =

+25°C, unless otherwise noted. Note 2.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Low-Side MOSFET On-

Resistance

RON_LS

1Φ, ILXx = -190mA

mΩ

Nominal Switching

Frequency

FSW

FPWM mode, no

load, no external

clock, TJ = +25°C

(Note 4)

Mx_FREQ[1:0] =

0x0

0.5

MHz

Mx_FREQ[1:0] =

0x1

Mx_FREQ[1:0] =

0x2

1.5

Maximum Duty Cycle

DMAX

Drop-out region (VOUT falls below its

regulation target)

LX Active Discharge

Resistance

RAD1

1Φ, buck output disabled, active

discharge enabled (Mx_ADIS1 = 1),

resistance from corresponding LXX to

PGNDx

RAD100

1Φ, buck output disabled, active

discharge enabled (Mx_ADIS100 = 1),

resistance from corresponding LXX to

PGNDx

100

LX Leakage Current

ILX_LKG

1Φ, VLXx = 0V or

16V, Mx_ADIS100

= 0

TJ = +25°C

μA

TJ = -40°C to

+85°C (Note 5)

SLEW RATE AND TIMING

Soft-Start Slew Rate

(Note 6)

∆VOUT/∆t

Mx_SSTRT_SR[2:0] = 0x0

0.15

mV/μs

Mx_SSTRT_SR[2:0] = 0x1

0.625

Mx_SSTRT_SR[2:0] = 0x2

1.25

Mx_SSTRT_SR[2:0] = 0x3

2.5

Mx_SSTRT_SR[2:0] = 0x4

Mx_SSTRT_SR[2:0] = 0x5

Mx_SSTRT_SR[2:0] = 0x6

Mx_SSTRT_SR[2:0] = 0x7

Soft-Stop Slew Rate

(Note 6)

∆VOUT/∆t

Mx_SSTOP_SR[2:0] = 0x0

-0.15

mV/μs

Mx_SSTOP_SR[2:0] = 0x1

-0.625

Mx_SSTOP_SR[2:0] = 0x2

-1.25

Mx_SSTOP_SR[2:0] = 0x3

-2.5

Mx_SSTOP_SR[2:0] = 0x4

-5

Mx_SSTOP_SR[2:0] = 0x5

-10

Mx_SSTOP_SR[2:0] = 0x6

-20

Mx_SSTOP_SR[2:0] = 0x7

-40

MAX77542

16VIN/16A, Quad-Phase High-Efficiency Buck

Converter

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