LTC4155 datasheet(23/26 Pages) AD

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LTC4041

Rev A

For more information www.analog.com

TYPICAL APPLICATIONS

3.3V Backup System with 12V Buck for Automotive Application

(Charge Current Setting: 1A, Input Current Limit Setting: 2A)

340k

1nF

2.2µH

VSYS

CAPFB

BAL

BSTEN

CAPSEL CPF PROG

GND

CHGEN

SYSGD

CAPGD

IMON

IGATE

LTC4041

VIN

CLN

1.07M

MN2

3.3V

12m

VOUT

3.3V

SUPERCAP

50F

100µF

47µF

4.7µF

0.1µF

SYSTEM

LOAD

BSTFB

RSTFB

SCAP

4041 TA02

OVSNS

PFI

121k

75k

422k

L1: COILCRAFT XAL-5030-222

MN2: VISHAY/SILICONIX SiS488DN

18.2k

2.2µH

1.02M

10nF

10pF

1µF

BST

VIN

12V

VIN

EN/UV

SYNC

TR/SS

INTVCC

PGND

LT8610

GND

BIAS

PFO

CAPFLT

348k

698k

5V Backup Application with Non-Backed Up 3.3V Load Option

(Charge Current Setting: 2.5A, Input Current Limit Setting: 2.5A)

200k

113k

38.3k

806

1nF

2.2µH

VSYS

CAPFB

BAL

BSTEN

CAPSEL

CPF PROG

GND

CHGEN

SYSGD

CAPGD

IMON

IGATE

LTC4041

VIN

VOUT

GND

LDO

CLN

1050k

MN1

VSYS

4.7V TO 5V

10m

SUPERCAP

10F

SUPERCAP

10F

100µF

2.2µF

TO BACKED UP

SYSTEM OUTPUT

TO NON-BACKED UP

3.3V SYSTEM OUTPUT

4.7V TO 5V

INPUT SUPPLY

BSTFB

RSTFB

SCAP

4041 TA02a

OVSNS

PFI

L1: COILCRAFT XAL-5030-222

MN2: VISHAY/SILICONIX SiS488DN

PFO

CAPFLT

340k

2.5V OUTPUT

1070k

VSYS

LTC4155 Datasheet(PDF) 23 Page - Analog Devices

LTC4155 Datasheet(HTML) 23 Page - Analog Devices

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