LTC3891 datasheet(2/40 Pages) LINER

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LTC3858-2

38582f

PIN CONFIGURATION

ABSOLUTE MAXIMUM RATINGS

(Note 1)

32 31 30 29 28 27 26 25

10 11 12 13 14 15 16

TOP VIEW

SENSE1–

FREQ

PHASMD

CLKOUT

PLLIN/MODE

SGND

RUN1

RUN2

BOOST1

BG1

VIN

PGND

EXTVCC

INTVCC

BG2

BOOST2

UH PACKAGE

32-LEAD (5mm

5mm) PLASTIC QFN

SGND

TJMAX = 125°C, θJA = 34°C/W

EXPOSED PAD (PIN 33) IS SGND, MUST BE SOLDERED TO PCB

ORDER INFORMATION

LEAD FREE FINISH

TAPE AND REEL

PART MARKING*

PACKAGE DESCRIPTION

TEMPERATURE RANGE

LTC3858EUH-2#PBF

LTC3858EUH-2#TRPBF

38582

32-Lead (5mm × 5mm) Plastic QFN

–40°C to 125°C

LTC3858IUH-2#PBF

LTC3858IUH-2#TRPBF

38582

32-Lead (5mm × 5mm) Plastic QFN

–40°C to 125°C

Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.

Consult LTC Marketing for information on non-standard lead based finish parts.

For more information on lead free part marking, go to: http://www.linear.com/leadfree/

For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/

Input Supply Voltage (VIN)......................... –0.3V to 40V

Topside Driver Voltages

BOOST1, BOOST2 ................................. –0.3V to 46V

Switch Voltage (SW1, SW2) ......................... –5V to 40V

(BOOST1-SW1), (BOOST2-SW2) ................ –0.3V to 6V

RUN1, RUN2 ............................................... –0.3V to 8V

Maximum Current Sourced into Pin

from Source >8V ..............................................100μA

SENSE1+, SENSE2+, SENSE1–

SENSE2– Voltages ..................................... –0.3V to 28V

PLLIN/MODE Voltage................................... –0.3V to 6V

ILIM, PHASMD, FREQ Voltages .............–0.3V to INTVCC

EXTVCC ..................................................... –0.3V to 14V

ITH1, ITH2,VFB1, VFB2 Voltages....................... –0.3V to 6V

PGOOD1, PGOOD2 Voltages ....................... –0.3V to 6V

SS1, SS2, INTVCC Voltages ......................... –0.3V to 6V

Operating Junction Temperature Range

(Note 2).................................................. –40°C to 125°C

Maximum Junction Temperature (Note 3) ............ 125°C

Storage Temperature Range .................. –65°C to 150°C

ELECTRICAL CHARACTERISTICS

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VIN

Input Supply Operating Voltage

Range

438

VFB1,2

Regulated Feedback Voltage

(Note 4) ITH1,2 = 1.2V

–40°C to 125°C

–40°C to 85°C

0.788

0.792

0.800

0.812

0.808

IFB1,2

Feedback Current

(Note 4)

±5

±50

VREFLNREG

Reference Voltage Line Regulation

(Note 4) VIN = 4.5V to 38V

0.002

0.02

%/V

The

l denotes the specifications which apply over the full operating

junction temperature range, otherwise specifications are at TA = 25°C (Note 2). VIN = 12V, VRUN1,2 = 5V, EXTVCC = 0V unless

otherwise noted.

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