LTC1148CN 查看數據表（PDF） - Linear Technology

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LTC1148CN

High Efficiency Synchronous Step-Down Switching Regulators

Linear Technology 

U

TYPICAL APPLICATIO S

LTC1148

LTC1148-3.3/LTC1148-5

MMSF3P02HD

VIN

3.5V TO 14V

+

D1

MBRS140T3

CIN

100µF

20V

MMSF5N02HD

+ 1µF

CT

270pF

CC

3300pF

RC

1k

1 P-DRIVE

14

N-DRIVE

2

NC

13

NC

LTC1148L-3.3

3

12

VIN

PGND

*L

25µH

4 CT

11

SGND

5 INTVCC SHUTDOWN 10 SHUTDOWN

6

ITH

NC 9

7 SENSE– SENSE+ 8

1000pF

*COILTRONICS CTX25-5 Kool Mµ CORE

**IRC LR2512-01-R050-G

+

RSENSE**

0.05Ω

COUT

220µF

10V

×2

AVX

VOUT

3.3V/2A

LTC1148 • F13

Figure 13. 5V Input Voltage, 3.3V/2A Low Dropout, High Efficiency Regulator

CT

560pF

VIN

4V TO 9V

VIN: ACTIVE

0V: SHUTDOWN

TP0610L

Si4431DY

+

D1

MBRS140T3

CIN

220µF

20V

+ 1µF

10nF

CC

6800pF

RC

1k

1 P-DRIVE N-DRIVE 14

2 NC

NC 13

LTC1148

3

12

VIN

PGND

4 CT

11

SGND

5 INTVCC SHUTDOWN 10

6

ITH

VFB 9

7 SENSE–

SENSE+ 8

*COILTRONICS CTX50-2-MP

**KRL SL-1-C1-0R050J

Si4412DY

*L

50µH

1M

1000pF

200pF

RSENSE**

0.05Ω

R1

25k

1%

+

R2

75k

1%

VOUT

– 5V/1.4A

COUT

220µF

10V

×2

OS-CON

LTC1148 • F14

Figure 14. 4V to 9V Input Voltage to – 5V/1A Regulator

17

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