LTC3728EG datasheet(2/32 Pages) LINER

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LTC3728

3728fb

ORDER PART

NUMBER

LTC3728EG

Input Supply Voltage (VIN).........................36V to –0.3V

Top Side Driver Voltages

(BOOST1, BOOST2) ...................................42V to – 0.3V

Switch Voltage (SW1, SW2) .........................36V to – 5V

INTVCC, EXTVCC, RUN/SS1, RUN/SS2, (BOOST1-SW1),

(BOOST2-SW2), PGOOD .............................7V to – 0.3V

SENSE1+, SENSE2 +, SENSE1–,

SENSE2 – Voltages ........................ (1.1)INTVCC to –0.3V

TJMAX = 125°C, θJA = 95°C/W

TOP VIEW

G PACKAGE

28-LEAD PLASTIC SSOP

RUN/SS1

SENSE1+

SENSE1–

VOSENSE1

PLLFLTR

PLLIN

FCB

ITH1

SGND

3.3VOUT

ITH2

VOSENSE2

SENSE2–

SENSE2+

PGOOD

TG1

SW1

BOOST1

VIN

BG1

EXTVCC

INTVCC

PGND

BG2

BOOST2

SW2

TG2

RUN/SS2

ABSOLUTE

AXI U

RATI GS

PACKAGE/ORDER I FOR ATIO

(Note 1)

PLLIN, PLLFLTR, FCB, Voltage ............ INTVCC to –0.3V

ITH1, ITH2, VOSENSE1, VOSENSE2 Voltages ...2.7V to –0.3V

Peak Output Current <10

µs (TG1, TG2, BG1, BG2) ... 3A

INTVCC Peak Output Current ................................ 50mA

Operating Temperature Range (Note 7) ... –40

°C to 85°C

Junction Temperature (Note 2) ............................. 125

°C

Storage Temperature Range ................. – 65

°C to 125°C

Lead Temperature (Soldering, 10 sec)

(G Package Only) .................................................. 300

°C

31 30 29 28 27 26 25

10 11 12 13

TOP VIEW

14 15 16

VOSENSE1

PLLFLTR

PLLIN

FCB

ITH1

SGND

3.3VOUT

ITH2

BOOST1

VIN

BG1

EXTVCC

INTVCC

PGND

BG2

BOOST2

ORDER PART

NUMBER

LTC3728EUH

UH PACKAGE

32-LEAD (5mm

× 5mm) PLASTIC QFN

TJMAX = 125°C, θJA = 34°C/W

EXPOSED PAD IS SGND (MUST BE SOLDERED TO PCB)

The

● denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VIN = 15V, VRUN/SS1, 2 = 5V unless otherwise noted.

ELECTRICAL CHARACTERISTICS

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Main Control Loops

VOSENSE1, 2

Regulated Feedback Voltage

(Note 3); ITH1, 2 Voltage = 1.2V

●

0.792

0.800

0.808

IVOSENSE1, 2

Feedback Current

(Note 3)

– 5

– 50

VREFLNREG

Reference Voltage Line Regulation

VIN = 3.6V to 30V (Note 3)

0.002

0.02

%/V

VLOADREG

Output Voltage Load Regulation

(Note 3)

Measured in Servo Loop;

∆ITH Voltage = 1.2V to 0.7V

●

0.1

0.5

Measured in Servo Loop;

∆ITH Voltage = 1.2V to 2.0V

●

– 0.1

– 0.5

Consult LTC Marketing for parts specified with wider operating temperature ranges.

UH PART

MARKING

3728

Order Options Tape and Reel: Add #TR

Lead Free: Add #PBF

Lead Free Tape and Reel: Add #TRPBF Lead Free Part Marking: http://www.linear.com/leadfree/

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