MAX15014 datasheet(4/25 Pages) MAXIM

4 / 25 page

(VIN_SW = VIN_LDO = VDRAIN = 14V, VEN_SYS = VEN_SW = 2.4V, VREG = VDVREG, VSYNC = VSET_LDO = VSGND = VPGND = 0V,

CREG = 1μF, CIN_SW = 0.1μF, CIN_LDO = 0.1μF, CLDO_OUT = 10μF, CDRAIN = 0.22μF, TA = TJ = -40°C to +125°C, unless otherwise

noted. Typical values are at TA = +25°C.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

SYNC Frequency Range

fSYNC

MAX15014/MAX15016

100

200

kHz

MAX15015/MAX15017

400

600

Ramp Level Shift (Valley)

0.3

ERROR AMPLIFER

Soft-Start Reference Voltage

VSS

1.210

1.235

1.260

Soft-Start Current

ISS

VSS = 0V

µA

FB Regulation Voltage

VFB

1.210

1.235

1.260

FB Input Range

VFB

1.5

FB Input Current

IFB

VFB = 1.244V

-250

+250

COMP Voltage Range

ICOMP = -500µA to +500µA

0.25

4.5

Open-Loop Gain

Unity-Gain Bandwidth

1.8

MHz

PWM Modulator Gain

fSYNC = 500kHz, MAX15015/MAX15017

V/V

fSYNC = 135kHz, MAX15014/MAX15016

CURRENT-LIMIT COMPARATOR

Pulse Skip Threshold

IPFM

100

200

300

Cycle-by-Cycle Current Limit

IILIM

1.3

2.6

Number of Consecutive ILIM

Events to Hiccup

—

Hiccup Timeout

512

Clock

periods

POWER SWITCH

Switch On-Resistance

VBST - VLX = 6V

0.15

0.4

0.80

Ω

Switch Gate Charge

VBST - VLX = 6V

Switch Leakage Current

VIN_SW = VIN_LDO = VLX = VDRAIN =

40V, VFB = 0V

µA

BST Quiescent Current

VBST = 40V, VDRAIN = 40V, VFB = 0V,

DVREG = 5V

400

600

µA

BST Leakage Current

VBST = VDRAIN = VLX = VIN_SW = VIN_

LDO = 40V, EN_SW = 0V

µA

CHARGE PUMP (MAX15015/MAX15016)

C- Output Voltage Low

Sinking 10mA

0.1

C- Output Voltage High

Relative to DVREG, sourcing 10mA

0.1

DVREG to C+ On-Resistance

Sourcing 10mA

Ω

LX to PGND On-Resistance

Sinking 10mA

Ω

LDO

Input Voltage Range

VIN_LDO

Undervoltage Lockout Threshold

UVLO_LDOTH VIN_LDO rising

3.90

4.1

4.25

MAX15014–MAX15017

1A, 4.5V to 40V Input Buck Converters with

50mA Auxiliary LDO Regulators

www.maximintegrated.com

Maxim Integrated │ 4

Electrical Characteristics (continued)

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