DFE252012F-R47M datasheet(9/122 Pages) AD

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Electrical Characteristics—Top-Level

(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

INPUT VOLTAGE AND SUPPLY CURRENT

SYS and INx Voltage

Range

VSYS, VINx

2.8

SYS Undervoltage Lock-

Out (UVLO)

VUVLO_R

VSYS rising

2.8

2.9

3.0

VUVLO_F

VSYS falling with 200mV of hysteresis

2.6

2.7

2.8

Power-On Reset (POR)

Threshold (Note 7)

VPOR

VSYS falling

1.7

Shutdown Supply

Current (Note 3)

ISHDN

VCE = 0V, TJ = -40°C to +85°C

1.5

μA

Standby Supply Current

(Note 3)

ISTBY

FTMON_EN = 0, all bucks are disabled,

TJ = -40°C to +85°C

μA

Quiescent Supply

Current in LP-Skip Mode

(Note 3)

IQ_LP-SKIP

VALT_IN = 0V,

VOUT >

VOUT(TARGET), no

load

Only one buck

phase is enabled

270

370

μA

Two buck phases

are enabled

380

480

Three buck phases

are enabled

505

635

All buck phases are

enabled

625

755

Quiescent Supply

Current in Skip Mode

(Note 3)

IQ_SKIP

VALT_IN = 0V,

VOUT >

VOUT(TARGET), no

load

Only one buck

phase is enabled

300

405

μA

Two buck phases

are enabled

450

555

Three buck phases

are enabled

620

750

All buck phases are

enabled

780

910

INTERNAL BIAS SUPPLY

VDD Regulator Voltage

VDD

1.9

VDD Undervoltage Lock-

Out (UVLO)

VDD_UVLO_F

1.55

VL12, VL34 Regulator

Voltage

VLx

1.8

VL12, VL34

Undervoltage Lock-Out

(UVLO)

VL_UVLO_F

1.55

ALT_IN Switchover

Threshold

VSWO

VALT_IN rising, 100mV hysteresis, VL and

VDD input switches from SYS to ALT_IN

above this threshold

2.7

2.8

2.9

ALT_IN Valid Voltage

Range

VALT_IN

VSWO

5.5

ALT_IN Shutdown

Supply Current

IALT_IN_SHDN VCE = 0V, VALT_IN = 3.3V

0.2

μA

MAX77542

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

Converter

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