LTC3785_15 datasheet(2/20 Pages) LINER

Part #	LTC3785

Description	10V, High Efficiency, Synchronous, No RSENSE Buck-Boost Controller

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Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

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LTC3785

3785fc

The l denotes the specifications which apply over the full operating junction

temperature range, otherwise specifications are at TA = 25°C. VIN = ISVOUT = VDRV = VBST1 = VBST2 = 3.6V, RT = 49.9k, RILSET = 59k.

pin conFiguraTion

absoluTe MaxiMuM raTings

Input Supply Voltage (VIN)......................... –0.3V to 11V

ISVOUT, ISVIN .............................................. –0.3V to 11V

SW1, SW2, ISSW1, ISSW2 Voltage:

DC............................................................. –1V to 11V

Pulsed, <1µs............................................. –2V to 12V

RUN/SS, MODE, CCM, VDRV, VCC Voltages.. –0.3V to 6V

VBST1 Voltage............................................. –0.3V to 16V

With Respect to SW1............................... –0.3V to 6V

VBST2 Voltage............................................. –0.3V to 16V

With Respect to SW2............................... –0.3V to 6V

Peak Driver Output Current < 10µs

(TG1, TG2, BG1, BG2).................................................3A

VCC Average Output Current.................................100mA

Operating Junction Temperature Range

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

Junction Temperature ........................................... 125°C

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

(Note 1)

24 23 22 21 20 19

7

8

9

TOP VIEW

25

GND

UF PACKAGE

24-LEAD (4mm 4mm) PLASTIC QFN

10 11 12

6

5

4

3

2

1

13

14

15

16

17

18

RUN/SS

VC

FB

VSENSE

ILSET

CCM

ISSW1

BG1

VDRV

BG2

ISSW2

SW2

TJMAX = 125°C, θJA = 40°C/W 1 LAYER BOARD, θJA = 30°C/W 4 LAYER BOARD

EXPOSED PAD (PIN 25) IS GND, MUST BE SOLDERED TO PCB

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VIN Supply

Input Operating Voltage

l

2.7

10

V

Quiescent Current—Burst Mode Operation

VC = 0V, MODE = 3.6V (Note 4)

86

200

µA

Quiescent Current—Shutdown

RUN/SS = 0V, ISVOUT = 3.6V

15

25

µA

Quiescent Current—Active

MODE = 0V (Note 4)

0.8

1.5

mA

Error Amp

Feedback Voltage

(Note 5)

l

1.200

1.225

1.25

V

Feedback Input Current

1

500

nA

orDer inForMaTion

LEAD FREE FINISH

TAPE AND REEL

PART MARKING*

PACKAGE DESCRIPTION

TEMPERATURE RANGE

LTC3785EUF#PBF

LTC3785EUF#TRPBF

3785

24-Lead (4mm

× 4mm) Plastic QFN

–40°C to 85°C

LTC3785IUF#PBF

LTC3785IUF#TRPBF

3785

24-Lead (4mm

× 4mm) Plastic QFN

–40°C to 125°C

LEAD BASED FINISH

TAPE AND REEL

PART MARKING*

PACKAGE DESCRIPTION

TEMPERATURE RANGE

LTC3785EUF

LTC3785EUF#TR

3785

24-Lead (4mm

× 4mm) Plastic QFN

–40°C to 85°C

LTC3785IUF

LTC3785IUF#TR

3785

24-Lead (4mm

× 4mm) 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.

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

This product is only offered in trays. For more information go to: http://www.linear.com/packaging/

elecTrical characTerisTics

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