LTC7802EUFDM datasheet(34/34 Pages) AD

34 / 34 page

LTC7802

Rev. 0

For more information www.analog.com



ANALOG DEVICES, INC. 2020

09/20

www.analog.com

RELATED PARTS

TYPICAL APPLICATION

Figure 12. High Efficiency 360W 2-Phase Single Output 12V Step-Down Regulator

MTOP1

MBOT1

0.1µF

1nF

L1, 4.7µH

7802 F12a

LTC7802

RUN1

RUN2

VFB2

MODE

INTVCC

VIN

16V TO 38V

VOUT

12V, 30A

SENSE1–

BOOST2

EXTVCC

VFB1

TG2

SW2

BG2

ITH1

TRACK/SS1

PGOOD1

PGOOD2

ITH2

TRACK/SS2

FREQ

PLLIN/SPREAD

SENSE1+

SW1

BG1

TG1

BOOST1

fSW = 200kHz

MTOP1,2: VISHAY SIJA72ADP

MBOT1,2: VISHAY SIR640ADP

L1,2: COILCRAFT XAL1510-472MEB

D1,2: CENTRAL SEMI CMDSH-4E

COUT: KEMET T521X337M016ATE025

GND

140k

10k

0.1µF

100pF

10nF

5.9k

185k

SENSE2+

SENSE2–

100µF

10µF

INTVCC

VIN

MTOP2

MBOT2

0.1µF

L2, 4.7µH

INTVCC

VIN

COUT

330µF

16V

10µF

×6

4.7µF

10pF

PART NUMBER

DESCRIPTION

COMMENTS

LTC7802-3.3

40V Dual Low IQ, 3MHz, 2-Phase Synchronous Step-Down

Controller with Spread Spectrum and Fixed 3.3VOUT1

4.5V ≤ VIN ≤ 40V, VOUT Up to 40V, IQ = 12µA Fixed Frequency

100kHz to 3MHz, 4mm × 5mm QFN-28

LTC7803

40V Low IQ, 100% Duty Cycle, Synchronous Step-Down

Controller with Spread Spectrum

4.5V ≤ VIN ≤ 40V, VOUT Up to 40V, IQ = 12µA Fixed Frequency

100kHz to 3MHz, 3mm × 3mm QFN-16/MSOP-16

LTC3807

38V Low IQ, Synchronous Step-Down Controller with

24V Output Voltage Capability

4V ≤ VIN ≤ 38V, 0.8V ≤ VOUT ≤ 24V, IQ = 50µA PLL Fixed Frequency

50kHz to 900kHz, 3mm × 4mm QFN-20/TSSOP-20

LTC3890/LTC3890-1/

LTC3890-2/LTC3890-3

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

DC/DC Controller with 99% Duty Cycle

4V ≤ VIN ≤ 60V, 0.8V ≤ VOUT ≤ 24V, IQ = 50µA PLL Fixed Frequency

50kHz to 900kHz

LTC3892

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

DC/DC Controller with Adjustable Gate Drive Voltage

4V ≤ VIN ≤ 60V, 0.8V ≤ VOUT ≤ 24V, IQ = 29µA PLL Fixed Frequency

50kHz to 900kHz

LTC3850

Dual, 2-Phase Synchronous Step-Down DC/DC Controller 4V ≤ VIN ≤ 24V, VOUT Up to 5.5V PLL Fixed Frequency 250kHz to 750kHz

LTC3855

Dual, Multiphase, Synchronous Step-Down DC/DC Controller

with Diff Amp and DCR Temperature Compensation

4.5V ≤ VIN ≤ 38V, 0.8V ≤ VOUT ≤ 12V PLL Fixed Frequency 250kHz

to 770kHz, Excellent Current Share

LTC3869/LTC3869-2

Dual Output, 2-Phase Synchronous Step-Down DC/DC

Controller, with Accurate Current Share

4V ≤ VIN ≤ 38V, VOUT Up to 12.5V PLL Fixed 250kHz to 750kHz

Frequency

LTC3875

Dual, 2-Phase, Synchronous Controller with Sub-Milliohm

DCR Sensing and Temperature Compensation

4.75V ≤ VIN ≤ 38V, 0.6V ≤ VOUT ≤ 3.5V/5V, Excellent Current Share

LTC3774

Dual, Multiphase Current Mode Synchronous Step-Down

DC/DC Controller for Sub-Milliohm DCR Sensing

Operates with DrMOS, Power Blocks or External Drivers/MOSFETs,

4.5V≤ VIN ≤ 38V, 0.6V ≤ VOUT ≤ 3.5V

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