LT8705 datasheet(42/42 Pages) LINER

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LTC7813

7813f

For more information www.linear.com/LTC7813

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LINEAR TECHNOLOGY CORPORATION 2016

LT 0316 • PRINTED IN USA

LinearTechnology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

(408)432-1900 ● FAX: (408) 434-0507 ● www.linear.com/LTC7813

relaTeD parTs

Typical applicaTion

PART NUMBER DESCRIPTION

COMMENTS

LTC7812

38V Synchronous Boost+Buck Controller with Low EMI

and Low Input/Output Ripple

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

0.8V ≤ Buck VOUT ≤ 24V, IQ = 33µA, 5mm × 5mm QFN-32

LTM®4609

36VIN, 34VOUT, Buck-Boost µModule Regulator

4.5V≤ VIN ≤ 36V, 0.8V ≤ VOUT ≤ 34V, Up to 4A 15mm × 15mm LGA and

BGA Packages

LTM8056

58VIN, 48VOUT, Buck-Boost µModule Regulator

5V≤ VIN ≤ 58V, 1.2V ≤ VOUT ≤ 48V, Up to 5.4A 15mm × 15mm × 4.92mm

BGA Package

LTC3789

High Efficiency (Up to 98%) Synchronous 4-Switch

Buck-Boost DC/DC Controller

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

LT®3790

60V 4-Switch Synchronous Buck-Boost Controller

4.7V ≤ VIN ≤ 60V, 1.2V ≤ VOUT ≤ 60V, TSSOP-38

LT8705

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

DC/DC Controller

2.8V ≤ VIN ≤ 80V, 1.3V ≤ VOUT ≤ 80V, Regulates VOUT, IOUT, VIN, IIN,

5mm × 7mm QFN-38, Modified TSSOP Package for High Voltage

LTC3769

Low IQ, 60V Synchronous Step-Up DC/DC Controller

4.5V (Down to 2.3V After Start-Up) ≤ VIN ≤ 60V, VOUT Up to 60V, IQ = 28µA

PLL Fixed Frequency 50kHz to 900kHz, 4mm × 4mm QFN-24, TSSOP-20E

LTC3891

Low IQ, 60V Synchronous Step-Down Controller with

99% Duty Cycle

PLL Fixed Frequency 50kHz to 900kHz, 4V ≤ VIN ≤ 60V, 0.8V ≤ VOUT ≤ 24V,

IQ = 50µA

LTC3859AL

38V Low IQ Triple Output, Buck/Buck/Boost Synchronous

Controller with 28μA Burst Mode IQ

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

Buck VOUT Range: 0.8V to 24V

LTC3899

60V, Triple Output, Buck/Buck/Boost Synchronous

Controller with 29µA Burst Mode IQ

4.5V (Down to 2.2V after Start-Up) ≤ VIN ≤ 60V, VOUT Up to 60V,

Buck VOUT Range: 0.8V to 60V

LTC3892/

LTC3892-1/

LTC3892-2

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

DC/DC Controller with 29µA Burst Mode IQ

4.5V≤ VIN ≤ 60V, 0.8V ≤ VOUT ≤ 0.99VIN, 5mm × 5mm QFN-32,

TSSOP-28 Packages

0.1µF

100pF

2200pF

26.1k

820pF

10nF

2.94k

4.7µF

CIN1

47µF

CIN2,3,4

2.2µF

1000pF

4.7µH

7.3µH

MBOT2

MTOP2

MTOP1

MBOT1

COUT1

6.7µF

COUT2,3

56µF

1000pF

2.05k

3.01k

SENSE2+ SENSE2– BG2

SW2 BOOST2

TG2

INTVCC

GND

VFB2

VBIAS TG1 BOOST1 SW1 BG1 SENSE1+ SENSE1– VFB1

VOUT

20V TO 32V

5A*

VIN

4V TO 56V

DOWN TO

2.2V AFTER

START-UP

RUN1

VIN

RUN2 ITH1

ITH2

TRACK/SS1 SS2

FREQ PLLIN/MODE

ILIM DRVUV DRVSET

DRVCC

VMID, 20V**

LTC7813

VPRG2

MTOP1: INFINEON BSC123N08NS3

MTOP2, MBOT1, MBOT2: INFINEON BSC047N08NS3

L1: WÜRTH 7443551470

L2: WÜRTH 7443551730

CIN1, CMID4: SUNCON 63HVH47M

COUT3: SUNCON 50HVH56M

7813 TA02

RB1

499k

CB1

0.1µF

CB2

0.1µF

RA1

12.7k

RB2

499k

RA2

31.6k

CMID1,2,3

2.2µF

CMID4

47µF

CSS1

0.1µF

CSS2

0.1µF

* WHEN VIN < 12V MAXIMUM LOAD CURRENT

AVAILABLE IS REDUCED

** VMID = 20V WHEN VIN < 20V

VMID FOLLOWS VIN WHEN VIN > 20V

VOUT = 20V WHEN VIN < 20V

VOUT = 32V WHEN VIN > 32V

VOUT FOLLOWS VIN WHEN VIN IS 20V TO 32V

Low EMI, Wide Input Range Pass-Through Cascaded Boost+Buck Regulator

LT8705 Datasheet(PDF) 42 Page - Linear Technology

LT8705 Datasheet(HTML) 42 Page - Linear Technology

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