LTC3788_1 datasheet(2/32 Pages) LINER

Part #	LTC3788

Description	2-Phase, Dual Output Synchronous Boost Controller

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Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

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LTC3788

2

3788fa

PIN CONFIGURATION

ABSOLUTE MAXIMUM RATINGS

VBIAS......................................................... –0.3V to 40V

BOOST1, BOOST2...................................... –0.3V to 76V

SW1, SW2 ................................................. –0.3V to 70V

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

Maximum Current Sourced into Pin

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

PGOOD1, PGOOD2, PLLIN/MODE ............... –0.3V to 6V

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

EXTVCC......................................................... –0.3V to 6V

SENSE1+, SENSE1–,

SENSE2+, SENSE2–.................................... –0.3V to 40V

SENSE1+ – SENSE1–,

SENSE2+ – SENSE2–................................. –0.3V to 0.3V

ILIM, SS1, SS2, ITH1, ITH2, FREQ,

PHASMD, VFB1, VFB2 .......................... –0.3V to INTVCC

Operating Junction Temperature Range ... –40°C to 125°C

Storage Temperature Range................... –65°C to 125°C

(Notes 1, 3)

32

33

GND

31 30 29 28 27 26 25

9

10 11 12

TOP VIEW

UH PACKAGE

32-LEAD (5mm

5mm) PLASTIC QFN

13 14 15 16

17

18

19

20

21

22

23

24

8

7

6

5

4

3

2

1

SENSE1–

FREQ

PHASMD

CLKOUT

PLLIN/MODE

SGND

RUN1

RUN2

BOOST1

BG1

VBIAS

PGND

EXTVCC

INTVCC

BG2

BOOST2

TJMAX = 125°C, θJA = 34°C/W

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

ORDER INFORMATION

LEAD FREE FINISH

TAPE AND REEL

PART MARKING*

PACKAGE DESCRIPTION

TEMPERATURE RANGE

LTC3788EUH#PBF

LTC3788EUH#TRPBF

3788

32-Lead (5mm

× 5mm) Plastic QFN

–40°C to 125°C

LTC3788IUH#PBF

LTC3788IUH#TRPBF

3788

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/

ELECTRICAL CHARACTERISTICS

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Main Control Loop

VBIAS

Chip Bias Voltage Operating Range

4.5

38

V

VFB1,2

Regulated Feedback Voltage

ITH = 1.2V (Note 4)

l

1.188

1.200

1.212

V

IFB1,2

Feedback Current

(Note 4)

±5

±50

nA

VREFLNREG

Reference Line Voltage Regulation

VBIAS = 6V 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, VBIAS = 12V, unless otherwise noted (Note 2).

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