LTC3829 datasheet(49/54 Pages) LINER

49 / 54 page

LTC3838

3838fa

TYPICAL APPLICATIONS

Figure 19. 6.5V to 34V Input, 5V/12A and 3.3V/12A Dual Output, 300kHz, RSENSE, 5V Output Tied to EXTVCC, Step-Down Converter

100k

3838 F19

1nF

0.1μF

1.3μH

COUT4

100μF

COUT3

330μF

DB2

VOUT1

MT2

MB2

LTC3838

2.2Ω

73.2k

100k

137k

220pF

22pF

53.6k

45.3k

VIN

1μF

1nF

4.7μF

0.1μF

0.01μF

2.2μH

RS1

0.002Ω

RS2

0.002Ω

COUT2

150μF

COUT1

100μF

VOUT1

12A

VOUT2

3.3V

12A

VIN

6.5V TO 34V

45.3k

10k

SENSE1–

SENSE1+

BOOST1

TG1

SW1

SENSE2+

BOOST2

TG2

SW2

DRVCC1

INTVCC

DRVCC2

EXTVCC

DB1

SENSE2–

BG1

BG2

VFB2

PGND

VOUTSENSE1

–

PGOOD1

PGOOD2

TRACK/SS1

ITH1

DTR1

VRNG1

TRACK/SS2

ITH2

DTR2

PHASMD

MODE/PLLIN

CLKOUT

RUN2

VRNG2

SGND

RUN1

PGOOD1

PGOOD2

MB1

MT1

1μF

CIN2

10μF

CIN1

220μF

20Ω

CIN1: PANASONIC EEEFK1V221P

CIN2: TAIYO YUDEN GMK325BJ106MN-T

COUT1, COUT4: MURATA GRM31CR60J107ME39L

COUT2: SANYO 6TPE150MIC2

COUT3: SANYO 4TPD330M

DB1, DB2: DIODES INC. SDM10K45

L1: WÜRTH 7443320220

L2: WÜRTH 7443551130

MT1, MT2: INFINEON BSC093N04LSG

MB1, MB2: INFINEON BSC035N04LSG

LOAD CURRENT (A)

0.1

100

110

3838 F19b

0.5

1.0

1.5

2.0

3.0

2.5

FORCED CONTINUOUS MODE

DISCONTINUOUS MODE

EFFICIENCY

POWER

LOSS

VIN = 12V

VOUT = 5V

LOAD CURRENT (A)

0.1

100

110

3838 F19c

0.5

1.0

1.5

2.0

3.0

2.5

FORCED CONTINUOUS MODE

DISCONTINUOUS MODE

EFFICIENCY

POWER

LOSS

VIN = 12V

VOUT = 3.3V

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