LTC1148CN 查看數據表（PDF） - Linear Technology

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LTC1148CN

High Efficiency Synchronous Step-Down Switching Regulators

Linear Technology 

LTC1148

LTC1148-3.3/LTC1148-5

U

TYPICAL APPLICATIO S

1/2 Si4532

VIN

5.2V TO 18V

+

D1

MBRS140T3

CIN

100µF

25V

1/2 Si4532

+ 1µF

CT

390pF

CC

3300pF

RC

1k

1

14

P-DRIVE N-DRIVE

2 NC

NC 13

LTC1148HV-5

3 VIN

PGND 12

4

CT

SGND 11

*L

100µH

5

10

INTVCC SHUTDOWN

SHUTDOWN

6 ITH

NC 9

7 SENSE– SENSE+ 8

1000pF

*COILTRONICS CTX100-4 Kool Mµ CORE

**KRL SP-1/2-A1-0R100

+

RSENSE**

0.1Ω

COUT

220µF

10V

AVX

VOUT

5V/1A

LTC1148 • F10

Figure 10. 5V/1A High Efficiency Regulator

with Extended Input Voltage Range

1/2 Si4532

VIN

4V TO 18V

+

D1

MBRS140T3

CIN

100µF

25V

1/2 Si4532

+ 1µF

CT

300pF

CC

3300pF

RC

1k

1 P-DRIVE N-DRIVE 14

2 NC

NC 13

LTC1148HV-3.3

3

12

VIN

PGND

*L

50µH

4 CT

11

SGND

5

INTVCC SHUTDOWN

10

SHUTDOWN

6

ITH

9

NC

7 SENSE– SENSE+ 8

1000pF

*COILTRONICS CTX50-4 Kool Mµ CORE

**IRC LR2010-01-R100-G

+

RSENSE**

0.1Ω

COUT

220µF

10V

OS-CON

VOUT

3.3V/1A

LTC1148 • F11

Figure 11. High Efficiency 5V to 3.3V/1A Converter

with Extended Input Voltage Range

16

CT

390pF

IRF7204

VIN

8V TO 14V

+

D1

MBRS140T3

CIN

330µF

20V

IRF7201

1 P-DRIVE

14

N-DRIVE

+ 1µF

2

NC

13

NC

LTC1148

3

12

VIN

PGND

*L

50µH

4

CT

11

SGND

5

INTVCC SHUTDOWN

10

SHUTDOWN

R1

100pF

10k

1%

10nF

6 ITH

9

VFB

CC

3300pF

7 SENSE–

SENSE+ 8

R2

30k

RC

220Ω

1%

0.01µF

RSENSE**

0.033Ω

*COILTRONICS CTX50-2-MP

**KRL SL-1-C1-0R033J

( ) VOUT =

1

+

R2

R1

1.25V

VALUES SHOWN FOR VOUT = 5V

COUT

220µF

+ 10V

×2

OS-CON

VOUT

5V/3A

LTC1148 • F12

Figure 12. High Efficiency Adjustable 3A Regulator

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