LT3757 datasheet(38/38 Pages) LINER

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LTC3784

3784fb

For more information www.linear.com/LTC3784

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LINEAR TECHNOLOGY CORPORATION 2014

LT 0715 REV B • PRINTED IN USA

LinearTechnology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

(408)432-1900 ● FAX: (408) 434-0507 ● www.linear.com/3784

relaTeD parTs

Typical applicaTion

PART NUMBER

DESCRIPTION

COMMENTS

LTC3788/LTC3788-1

Multiphase, Dual Output Synchronous Step-Up

Controller

4.5V (Down to 2.5V After Start-Up) ≤ VIN ≤ 38V, VOUT Up to 60V, 50kHz to

900kHz Fixed Operating Frequency, 5mm

× 5mm QFN-32, SSOP-28

LTC3787

2-Phase Single Output Synchronous Boost Controller 4.5V ≤ VIN ≤ 38V, VOUT Up to 60V, 50kHz to 900kHz, 4mm × 5mm

QFN-28 and SSOP-28 Packages

LTC3786

Low IQ Synchronous Step-Up Controller

4.5V (Down to 2.5V After Start-Up) ≤ VIN ≤ 38V, VOUT Up to 60V, 50kHz to

900kHz Fixed Operating Frequency, 3mm

× 3mm QFN-32, MSOP-16E

LTC3862/LTC3862-1/

LTC3862-2

Multiphase, Dual Channel Single Output Current

Mode Step-Up DC/DC Controller

4V ≤ VIN ≤ 36V, 5V or 10V Gate Drive, 75kHz to 500kHz Fixed Operating

Frequency, SSOP-24, TSSOP-24, 5mm

× 5mm QFN-24

LT3757/LT3758

Boost, Flyback, SEPIC and Inverting Controller

2.9V ≤ VIN ≤ 40V/100V, 100kHz to 1MHz Fixed Operating Frequency,

3mm

× 3mm DFN-10 and MSOP-10E

LTC3859AL

Low IQ, Triple Output Buck/Buck/Boost Synchronous

DC/DC Controller

All Outputs Remain in Regulation Through Cold Crank, 4.5V (Down to

2.5V After Start-Up) ≤ VIN ≤ 38V, VOUT(BUCKS) Up to 24V, VOUT(BOOST)

Up to 60V, IQ = 28µA

LTC3789

High Efficiency Synchronous 4-Switch Buck-Boost

DC/DC Controller

4V ≤ VIN ≤ 38V, 0.8V ≤ VOUT ≤ 38V, 4mm × 5mm QFN-28 and SSOP-28

LT8705

80V VIN and VOUT Synchronous 4-Switch Buck-Boost

DC/DC Controller

VIN Range: 2.8V (Need EXTVCC > 6.4V) to 80V, VOUT Range: 1.3V to 80V,

Four Regulation Loops

LTC3890/LTC3890-1/

LTC3890-2/LTC3890-3

60V, Low IQ, Dual 2-Phase Synchronous Step-Down

DC/DC Controller

Phase-Lockable Fixed Frequency 50kHz to 900kHz, 4V ≤ VIN ≤ 60V,

0.8V ≤ VOUT ≤ 24V, IQ = 50μA

Figure 16. PolyPhase Application

TG1

BG1

0°

BOOST: 24V, 5A

REFER TO FIGURE 15 FOR APPLICATION CIRCUITS

* RIPPLE CURRENT CANCELLATION INCREASES THE RIPPLE

FREQUENCY AND REDUCES THE RMS INPUT/OUTPUT RIPPLE

CURRENT, THUS SAVING INPUT/OUTPUT CAPACITORS

3784 F16

PHASMD

LTC3784

CLKOUT

CIN

12V

24V, 20A

TG2

BG2

180°

BOOST: 24V, 5A

TG1

BG1

90°

90,270

+90°

BOOST: 24V, 5A

PHASMD

LTC3784

PLLIN/MODE

TG2

BG2

270°

BOOST: 24V, 5A

COUT

ICOUT

IIN

I*IN

I*COUT

LT3757 Datasheet(PDF) 38 Page - Linear Technology

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